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Scientists Just Captured Quantum Jumps in Sound · The Quark Side - Quantum Physics Podcast

• 0:01
  Speaker 1: Welcome to the QuarkSide Quantum Physics Podcast, an exploration of
• 0:05
  Speaker 1: the fundamental structure of reality, where quantum laws govern matter, energy,
• 0:11
  Speaker 1: and information. Here, uncertainty is a feature, not a flaw,
• 0:16
  Speaker 1: and understanding begins at the smallest scales.
• 0:27
  Speaker 2: I want you to imagine, just for a second, That
• 0:29
  Speaker 2: you're standing right next to a massive ancient bronze bell.
• 0:33
  Speaker 3: Okay, I'm picturing it.
• 0:35
  Speaker 2: So you take a heavy wooden mallet and you strike
• 0:38
  Speaker 2: the side of it as hard as you can. You
• 0:40
  Speaker 2: can literally feel that deep, resonant, powerful sound vibrating right
• 0:45
  Speaker 2: in your chest.
• 0:46
  Speaker 3: Yeah, you definitely feel that physically.
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  Speaker 2: But I want you to focus on what happens next.
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  Speaker 2: You stand there and you listen closely as that sound gradually, beautifully,
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  Speaker 2: and smoothly fades away into total silence.
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  Speaker 3: Right. I mean, that's an incredibly intuitive experience. The slow,
• 1:01
  Speaker 3: continuous decay of a sound wave is something you've probably
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  Speaker 3: heard and felt, you know, countless times in your life.
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  Speaker 2: Exactly.
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  Speaker 3: Whether it's a bell, a piano chord, or just an
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  Speaker 3: echo in an empty room, our brains are basically hardwired
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  Speaker 3: to understand acoustic energy as a flowing, continuous stream that
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  Speaker 3: eventually just runs dry.
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  Speaker 2: But what if I told you that this reality, that
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  Speaker 2: smooth fade-out you have experienced your entire life, is actually
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  Speaker 2: a total illusion?
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  Speaker 3: It's a pretty wild thought. It is.
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  Speaker 2: What if, when you zoom all the way down to
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  Speaker 2: the absolute microscopic level, that sound doesn't fade smoothly at all?
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  Speaker 2: What if, instead of fading like a dying echo, it
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  Speaker 2: suddenly and abruptly just jumps into total silence, like a
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  Speaker 2: light switch being flicked off in a dark room?
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  Speaker 3: It completely divides our everyday macroscopic experience of the physical world.
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  Speaker 3: I mean, we expect things to wind down smoothly.
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  Speaker 2: Right. A slow fade.
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  Speaker 3: Exactly. But the microscopic reality of the universe operates under
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  Speaker 3: a completely different, rigid set of rules that are honestly
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  Speaker 3: incredibly difficult for human beings to visualize.
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  Speaker 2: Well, today, our mission is to figure out how scientists
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  Speaker 2: finally pierce through that illusion. Because on September 17th, 2026,
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  Speaker 2: a monumental breakthrough was published in the journal Science.
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  Speaker 3: A really massive milestone.
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  Speaker 2: Truly. A team of physicists at Stanford University actually did
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  Speaker 2: the impossible. They recorded in real time the quantum jumps
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  Speaker 2: of sound.
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  Speaker 3: They managed to catch that microscopic light switch flicking off.
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  Speaker 2: Yes. Completing a scientific quest that physicists have literally been
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  Speaker 2: chasing for over 100 years.
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  Speaker 3: The theory behind this has actually been around since the
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  Speaker 3: very birth of quantum mechanics in the early 20th century.
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  Speaker 1: Right.
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  Speaker 2: The math was there.
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  Speaker 3: Yeah. The fundamental math of the universe told us this
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  Speaker 3: sudden instantaneous jump into silence had to be happening.
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  Speaker 2: But seeing it is a different story.
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  Speaker 3: Completely different. Actually building a mechanical trap sensitive enough to
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  Speaker 3: catch a single solitary unit of sound doing this in
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  Speaker 3: real time. That required pushing the absolute boundaries of modern engineering.
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  Speaker 2: So I really want to unpack this concept because the
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  Speaker 2: term quantum jump sounds like something out of a science
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  Speaker 2: fiction movie.
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  Speaker 3: It does get thrown around a lot in sci-fi.
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  Speaker 2: Right. So think about it like a volume knob on
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  Speaker 2: your stereo. Right. You and I, we experience the world
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  Speaker 2: like a smooth, continuous volume dial. You can turn it
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  Speaker 2: to a four or a four and a half.
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  Speaker 3: Or a 4.125.
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  Speaker 2: Exactly. You can have any fractional amount of volume you want.
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  Speaker 3: The underlying quantum reality of the universe, however, is a
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  Speaker 3: dial with distinct, rigid, locked clicks.
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  Speaker 2: No in-between states. Right.
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  Speaker 3: The universe just doesn't allow for in-between states at the
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  Speaker 3: microscopic level. You can be at an energy state of
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  Speaker 3: one or you can be at a zero. You absolutely
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  Speaker 3: cannot be at a 0.5.
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  Speaker 2: So the universe isn't a ramp. It's a staircase.
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  Speaker 3: A very rigid staircase.
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  Speaker 2: And today we're going to explore how scientists finally, literally,
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  Speaker 2: heard that tiny microscopic click down a step. And more importantly,
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  Speaker 2: we're going to explain why this seemingly abstract discovery is
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  Speaker 2: is going to fundamentally change the technology you use in
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  Speaker 2: your pocket every single day.
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  Speaker 3: Because to really appreciate why capturing this click of sound
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  Speaker 3: is such a massive milestone in human history, we have
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  Speaker 3: to look back the timeline of quantum physics.
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  Speaker 2: Okay, let's go back.
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  Speaker 3: So the concept of the quantum jump, the sudden transition
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  Speaker 3: from one energy state to another, without passing through any
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  Speaker 3: state in between that was first theorized in the early 1900s.
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  Speaker 2: I need to stop you for a second because I'm
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  Speaker 2: struggling to map this out in my head. We've known
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  Speaker 2: about this math since the 1900s.
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  Speaker 1: Yes.
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  Speaker 2: But it stayed purely theoretical for decades. The timeline here
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  Speaker 2: is what confuses me. Like, what took so long?
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  Speaker 3: Well, it was incredibly difficult to prove experimentally. Technology basically
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  Speaker 3: had to catch up with the theory. It wasn't until
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  Speaker 3: 1986 that scientists finally proved this phenomenon by observing quantum
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  Speaker 3: jumps in trapped ions. Okay, 1986?
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  Speaker 2: Right. They used specialized technology.
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  Speaker 3: Lasers to isolate an atom and actually watched it instantly
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  Speaker 3: snap from one state to another. That was the first
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  Speaker 3: major victory. Wow. Then, two decades later, in 2007, physicists
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  Speaker 3: managed to observe the exact same discrete jumping behavior in photons,
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  Speaker 3: which are the fundamental indivisible particles of light.
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  Speaker 2: See, that is the part that genuinely trips me up.
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  Speaker 3: How so?
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  Speaker 2: If we figured out how to watch an isolated atom
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  Speaker 2: jump in the 80s and we developed the technology to
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  Speaker 2: watch a particle of light jump in 2007, why on
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  Speaker 2: earth did it take until 2026 to watch sound do
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  Speaker 2: the exact same thing?
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  Speaker 3: Ah, I see what you mean.
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  Speaker 2: I mean, light travels at 186,000 miles per second. Sound
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  Speaker 2: is comparatively sluggish. Shouldn't a sluggish sound wave have been
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  Speaker 2: like so much easier to trap and measure?
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  Speaker 3: It seems completely counterintuitive until you stop thinking about speed
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  Speaker 3: and start thinking about mass and physical coordination. Okay. There
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  Speaker 3: is a fundamental structural difference between a quantum unit of
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  Speaker 3: light and a quantum unit of sound. When we talk
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  Speaker 3: about a single quantum unit of light, we're talking about
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  Speaker 3: a photon.
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  Speaker 2: Right. A single particle.
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  Speaker 3: Exactly. A photon is solitary. It is a singular independent
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  Speaker 3: entity just zipping through space. A quantum unit of sound
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  Speaker 3: is called a phonon. And a phonon is not a
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  Speaker 3: solitary object.
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  Speaker 2: A phonon is more like an event, isn't it? It's
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  Speaker 2: not a thing you can hold.
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  Speaker 3: That's a great way to put it. A phonon represents
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  Speaker 3: the highly coordinated movement of a massive, messy group of atoms.
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  Speaker 2: Because sound doesn't exist in a vacuum.
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  Speaker 3: Exactly. Sound is literally just the physical vibration of matter.
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  Speaker 3: So to capture a single phonon, you aren't trying to
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  Speaker 3: catch one solitary particle flying through an empty void. You're
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  Speaker 3: trying to isolate and measure the microscopic collective shivering of
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  Speaker 3: billions of atoms all working together in perfect rhythm.
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  Speaker 2: That distinction makes so much more sense. It's like, OK,
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  Speaker 2: a photon is a single person running across an empty
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  Speaker 2: football field. You can just point a camera at them
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  Speaker 2: and track them easily.
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  Speaker 3: Sure. Easy target.
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  Speaker 2: But a phonon is like trying to track a single
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  Speaker 2: stadium wave moving through a crowd of 80,000 screaming fans.
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  Speaker 3: Oh, that's a perfect analogy.
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  Speaker 2: The wave itself isn't a person. The wave is the temporary,
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  Speaker 2: perfectly timed movement of all those individual people standing up
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  Speaker 2: and sitting down.
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  Speaker 3: And that fragility, that reliance on perfect timing, is the
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  Speaker 3: exact barrier scientists faced for a century. The quantum state
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  Speaker 3: of a phonon is unimaginably delicate.
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  Speaker 2: Because of the measurement problem, right?
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  Speaker 3: Exactly. In quantum mechanics, we have this thing called the
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  Speaker 3: measurement problem.
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  Speaker 2: Yeah.
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  Speaker 3: The very act of observing a quantum system usually forces
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  Speaker 3: it to collapse.
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  Speaker 2: So if you try to aggressively measure your stadium wave.
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  Speaker 3: You end up bumping into the fans, throwing off their timing,
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  Speaker 3: and ruining the wave entirely. The energy just disperses.
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  Speaker 2: So you can't just stick a microscopic microphone in there
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  Speaker 2: and record it.
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  Speaker 3: Not at all. Any traditional microphone works by absorbing acoustic
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  Speaker 3: energy to move a physical diaphragm.
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  Speaker 2: Oh, right.
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  Speaker 3: If you absorb the energy of a single phone on
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  Speaker 3: to measure it, You destroy the phonon instantly. So the
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  Speaker 3: question became, how do you look at this incredibly fragile
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  Speaker 3: collective vibration without interacting with it so harshly that it
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  Speaker 3: collapses before you can even see the jump?
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  Speaker 2: And this brings us to the Stanford team and the
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  Speaker 2: brilliant engineering behind their 2026 science paper.
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  Speaker 3: Yes, the breakthrough.
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  Speaker 2: The team was led by physicists Amir Safavi-Naini, Takuma Makihara,
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  Speaker 2: and Eric Sakyo. And they realized they couldn't just scale
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  Speaker 2: down existing audio equipment. They had to invent an entirely
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  Speaker 2: new kind of physical trap.
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  Speaker 3: They really had to start from scratch.
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  Speaker 2: Right. They turned to advanced microchip fabrication techniques.
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  Speaker 3: They engineered a microscopic mechanical resonator out of solid materials
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  Speaker 3: on a silicon chip. To visualize this, just imagine a tiny,
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  Speaker 3: perfectly carved tuning fork so small you'd need a powerful
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  Speaker 3: electron microscope just to see its prongs.
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  Speaker 2: The scale is just hard to wrap your head around.
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  Speaker 2: But what really blew my mind was learning about the
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  Speaker 2: ring down time.
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  Speaker 3: Oh, yeah. The ring down time is incredible.
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  Speaker 2: They engineered this tiny structure so flawlessly and isolated it
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  Speaker 2: so perfectly from the ambient heat and noise of the
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  Speaker 2: room that once it starts vibrating with just one single
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  Speaker 2: phonon of acoustic energy, it will ring for two entire milliseconds.
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  Speaker 3: Which doesn't sound like a lot. To human perception, two
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  Speaker 3: milliseconds is nothing. It's a fraction of the time it
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  Speaker 3: takes you to blink. Right. But when you're operating in
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  Speaker 3: the quantum realm, where states collapse and atoms interact in
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  Speaker 3: billionths of a second, a two millisecond ring down time
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  Speaker 3: is an absolute eternity.
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  Speaker 2: The researchers provided an analogy that really grounds this engineering marvel.
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  Speaker 3: Let's hear it.
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  Speaker 2: They said if you were to scale their microscopic tuning
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  Speaker 2: fork up to the size of a regular tuning fork,
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  Speaker 2: the kind you might strike on a table to tune
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  Speaker 2: a piano, and it retained this exact same level of
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  Speaker 2: physical isolation... and perfect engineering.
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  Speaker 3: Right, if you kept the proportions perfect.
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  Speaker 2: You would strike it once and it would ring continuously
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  Speaker 2: for several hours. That is how desperately they had to
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  Speaker 2: protect this single unit of sound from the chaotic noise
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  Speaker 2: of the outside world.
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  Speaker 3: And that unprecedented two millisecond window was the key to
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  Speaker 3: the entire breakthrough. Because the phonon lasts so long inside
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  Speaker 3: this protective trap, The Stanford team finally had enough time
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  Speaker 3: to actually measure it.
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  Speaker 2: But they still had to solve that observation problem we
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  Speaker 2: discussed earlier.
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  Speaker 3: Right, the stadium wave.
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  Speaker 2: They had their perfectly isolated stadium wave, but they needed
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  Speaker 2: a way to watch it without bumping into the fans.
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  Speaker 2: So how did Makihara and Zekiel actually pull that off?
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  Speaker 3: They utilized something called a superconducting quibbit.
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  Speaker 2: A quibbit, like in a quantum computer.
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  Speaker 3: Exactly. A quibbit is a highly sensitive, microscopic electrical circuit
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  Speaker 3: that operates quantum mechanically. The genius of their experiment was
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  Speaker 3: taking this electrical detector and placing it incredibly close to
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  Speaker 3: the mechanical tuning fork.
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  Speaker 2: Close, but not touching.
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  Speaker 3: Right, they didn't wire them together in a way that
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  Speaker 3: transfers the vibration.
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  Speaker 2: So they aren't physically touching in a way that absorbs
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  Speaker 2: the sound wave.
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  Speaker 3: No, it's what physicists call an indirect measurement. As the
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  Speaker 3: mechanical tuning fork vibrates, it slightly alters the physical space
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  Speaker 3: around it.
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  Speaker 2: Okay, I follow.
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  Speaker 3: That subtle physical change... causes a tiny shift in the
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  Speaker 3: resonant frequency of the electrical circuit sitting next to it.
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  Speaker 2: Oh, wow.
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  Speaker 1: Yeah.
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  Speaker 3: So the quibbit isn't absorbing the sound at all. It's
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  Speaker 3: just sensing the secondary effects of the sound.
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  Speaker 2: It's like having a baby sleeping in a crib.
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  Speaker 3: Okay. How so?
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  Speaker 2: Well, if you open the door, turn on the bright
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  Speaker 2: overhead lights, and walk over to check on them, you're
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  Speaker 2: going to wake them up instantly. You've ruined the sleep
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  Speaker 2: state by observing it too aggressively.
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  Speaker 3: You've bumped the fans.
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  Speaker 2: Exactly. But if you set up a gentle infrared baby monitor,
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  Speaker 2: You can glance at the screen from the other room
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  Speaker 2: over and over again without ever disturbing the child.
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  Speaker 3: That is spot on. The superconducting quibbit is essentially the
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  Speaker 3: ultimate quantum baby monitor.
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  Speaker 2: I love that.
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  Speaker 3: During those two long milliseconds, while the microscopic tuning fork
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  Speaker 3: is ringing with one phonon of energy, the quibbit gently
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  Speaker 3: checks on it. It pulls the tuning fork hundreds of
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  Speaker 3: times in rapid succession, essentially asking the environment, is the
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  Speaker 3: vibration still happening? Is it still happening?
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  Speaker 2: And because it's so gentle, the delicate quantum state doesn't
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  Speaker 2: collapse from the observation.
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  Speaker 3: Precisely. They were able to check it hundreds of times
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  Speaker 3: in real time. And that is how they finally caught
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  Speaker 3: the physical universe in the act.
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  Speaker 2: They saw the jumps.
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  Speaker 3: They watched the tuning fork vibrating at a locked energy
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  Speaker 3: state of one. And then instantly, abruptly, with absolutely no
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  Speaker 3: smooth transition, the vibrational energy vanished. It dropped directly to
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  Speaker 3: an energy state of zero.
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  Speaker 2: They heard the click. They caught the rigid click of
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  Speaker 2: the quantum volume dial, that sudden jump into total silence.
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  Speaker 3: It is the very first real-time observation of a quantum
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  Speaker 3: jump in a macroscopic mechanical object. It definitively proves that
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  Speaker 3: mechanical structures, things with physical mass, things made of billions
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  Speaker 3: of coordinating atoms, can genuinely exhibit discrete quantum behavior. Just
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  Speaker 3: like those solitary photons of light or isolated ions.
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  Speaker 2: We've successfully proven a hundred-year-old physics theory. We proved the
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  Speaker 2: math was right. We proved the universe is a staircase.
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  Speaker 2: And we managed to safely observe the stadium wave.
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  Speaker 3: It's an incredibly elegant piece of laboratory science.
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  Speaker 2: It really is. But I can already hear you, the listener,
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  Speaker 2: asking the most important question. Why should you care?
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  Speaker 3: The so what factor.
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  Speaker 2: Right. How does catching a single sound wave jump from
• 13:21
  Speaker 2: a one to a zero actually impact the real world?
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  Speaker 2: What does this allow human beings to build tomorrow?
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  Speaker 3: Well, this goes far beyond confirming old theories. The Stanford
• 13:30
  Speaker 3: team has essentially established a foundational new platform for human technology.
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  Speaker 2: A whole new platform.
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  Speaker 1: Yeah.
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  Speaker 3: When you prove that you can control and measure physical
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  Speaker 3: sound at the absolute quantum limit, you kick open the
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  Speaker 3: doors in completely different technological industries. And the most immediate
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  Speaker 3: and critical application is in the race for quantum computing. Right.
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  Speaker 2: Quantum computers are often pitched as the ultimate future of tech.
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  Speaker 2: They promise to solve incredibly complex problems in seconds that
• 13:57
  Speaker 2: would take our current classical supercomputers thousands of years to crack.
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  Speaker 2: But they have a massive Achilles heel preventing them from
• 14:04
  Speaker 2: being useful right now.
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  Speaker 3: They are notoriously error prone. The entire system relies on
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  Speaker 3: quibbets holding on to their delicate quantum states while calculations
• 14:13
  Speaker 3: are performed. But any slight disturbance in the physical environment
• 14:17
  Speaker 3: around the quantum computer, a tiny fluctuation in temperature, a
• 14:22
  Speaker 3: stray electromagnetic wave, or even ambient physical vibrations can cause
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  Speaker 3: the calculation to instantly collapse.
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  Speaker 2: Just from a vibration.
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  Speaker 1: Yeah.
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  Speaker 3: In quantum computing architectures, a random quantum jump usually equals
• 14:36
  Speaker 3: a catastrophic error.
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  Speaker 2: I try to visualize quantum computing like building an impossibly
• 14:40
  Speaker 2: tall house of cards on top of a table.
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  Speaker 1: Okay.
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  Speaker 2: The complex calculation is the house of cards. But the
• 14:45
  Speaker 2: table is wobbly. If someone bumps the table or even
• 14:49
  Speaker 2: breathes too heavily on it, the entire structure instantly collapses
• 14:52
  Speaker 2: before you can finish building it.
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  Speaker 3: And the wobble of that table is very often caused
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  Speaker 3: by acoustic and thermal noise. In other words, stray phonons.
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  Speaker 2: Oh, stray phonons.
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  Speaker 1: Yes.
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  Speaker 3: If a piece of information in the computer randomly jumps
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  Speaker 3: from a 1 to a 0 because a rogue phonon
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  Speaker 3: vibrated through the chip, your output becomes complete garbage. The
• 15:12
  Speaker 3: biggest bottleneck in quantum computing today is error correction.
• 15:16
  Speaker 2: Finding the errors.
• 15:17
  Speaker 3: Exactly. Identifying exactly when and where those errors happen so
• 15:22
  Speaker 3: the system can fix them in real time.
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  Speaker 2: So by proving that we can reliably detect these spontaneous
• 15:27
  Speaker 2: quantum jumps using mechanical tuning forks and quibbets, we actually
• 15:32
  Speaker 2: have a new tool to track the errors.
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  Speaker 3: The Stanford team has shown that we can monitor the
• 15:36
  Speaker 3: wobble of the table in real time without knocking over
• 15:39
  Speaker 3: the cards ourselves.
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  Speaker 2: That's huge.
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  Speaker 3: It really is. By integrating these incredibly sensitive acoustic detection
• 15:45
  Speaker 3: devices into quantum architectures, we take a massive step to robust,
• 15:49
  Speaker 3: reliable quantum computers that actually work outside of a highly
• 15:53
  Speaker 3: controlled laboratory.
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  Speaker 2: That alone would completely change the trajectory of modern computing.
• 15:58
  Speaker 2: But the applications get even more tangible when we start
• 16:00
  Speaker 2: talking about human health and medical sensing.
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  Speaker 3: Definitely. Consider the physical platform they constructed. A microscopic mechanical
• 16:08
  Speaker 3: tuning fork hooked up to a hypersensitive electrical detector. To
• 16:12
  Speaker 3: get this to work, they had to cool the entire
• 16:14
  Speaker 3: system down to the quantum limit.
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  Speaker 2: Now, for someone who isn't a physicist, what does operating
• 16:19
  Speaker 2: at the quantum limit actually look like?
• 16:21
  Speaker 3: It basically involves placing the microchip in a highly specialized
• 16:24
  Speaker 3: refrigerator and cooling it down to just a tiny fraction
• 16:28
  Speaker 3: of a degree above absolute zero.
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  Speaker 2: So unimaginably cold.
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  Speaker 3: Exactly. At that extreme temperature, all the chaotic classical heat
• 16:37
  Speaker 3: vibrations that normally shake atoms around just freeze out.
• 16:40
  Speaker 2: They stop moving.
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  Speaker 3: The only vibration left is the absolute minimum allowed by
• 16:44
  Speaker 3: the laws of physics. Because the tuning fork is resting
• 16:47
  Speaker 3: in this perfectly still, ultra-cold state, it becomes unimaginably sensitive
• 16:52
  Speaker 3: to its environment. If even the tiniest speck of extra-physical
• 16:56
  Speaker 3: mass lands on the tuning fork, it will significantly change
• 16:59
  Speaker 3: the way the fork rings.
• 17:00
  Speaker 2: It's essentially the most accurate digital scale in human history.
• 17:03
  Speaker 3: Precisely. And Safavi Naini's team at Stanford recognized this potential immediately.
• 17:09
  Speaker 3: They're actually already collaborating with physicist Michael Rooks' team over
• 17:12
  Speaker 3: at Caltech to use this exact quantum acoustic platform for
• 17:17
  Speaker 3: biological sensing.
• 17:18
  Speaker 2: Really? How so?
• 17:19
  Speaker 3: They want to use the resonator to detect, weigh, and
• 17:22
  Speaker 3: identify individual proteins inside human cells.
• 17:26
  Speaker 2: Weighing an individual protein? That sounds impossible.
• 17:29
  Speaker 3: It is currently impossible with classical technology. But by analyzing
• 17:32
  Speaker 3: how a single protein molecule changes the precise quantum vibration
• 17:36
  Speaker 3: of this tuning fork, By literally listening to how the
• 17:39
  Speaker 3: pitch of the quantum click changes, they could potentially identify
• 17:42
  Speaker 3: mutated proteins that cause diseases long before any symptoms appear. Wow.
• 17:47
  Speaker 3: They could map cellular functions and understand human biology at
• 17:50
  Speaker 3: a level of mechanical precision we've never had access to.
• 17:54
  Speaker 3: We're talking about using quantum sound waves to read the
• 17:56
  Speaker 3: hidden mechanics of human life itself.
• 17:58
  Speaker 2: That is just incredible. We go from proving an obscure
• 18:02
  Speaker 2: 1900s physics theory to potentially diagnosing neurodegenerative diseases by listening
• 18:06
  Speaker 2: to the microscopic pitch of a cell.
• 18:08
  Speaker 3: It really illustrates how foundational science trickles up to save lives.
• 18:12
  Speaker 2: It really does. But let's bring it even closer to home.
• 18:16
  Speaker 2: Let's bring it right to the device that is probably
• 18:18
  Speaker 2: sitting in your pocket or resting on your desk right now.
• 18:21
  Speaker 2: Because sound isn't just for playing music or taking phone calls.
• 18:25
  Speaker 2: Sound is a fundamental structural technology in modern consumer electronics.
• 18:29
  Speaker 3: Yeah, Eric Sakiel, one of the doctoral students who worked
• 18:32
  Speaker 3: on this project, made this point very clearly. Most people
• 18:36
  Speaker 3: have no idea how heavily their daily digital lives rely
• 18:39
  Speaker 3: on physical acoustic technology.
• 18:42
  Speaker 2: Like in our phones.
• 18:43
  Speaker 3: Exactly. Your smartphone, for instance, is packed with dozens of
• 18:47
  Speaker 3: microscopic acoustic filters. When your phone connects to a 5G network,
• 18:52
  Speaker 3: It uses mechanical sound waves moving across tiny chips to
• 18:55
  Speaker 3: filter out background static, manage crowding radio frequencies, and cleanly
• 18:59
  Speaker 3: process incoming signals.
• 19:00
  Speaker 2: So our modern wireless communication networks literally would not function
• 19:04
  Speaker 2: without precisely controlled physical sound waves vibrating on microchips.
• 19:08
  Speaker 3: They wouldn't. Currently, those acoustic chips inside your phone are
• 19:12
  Speaker 3: operating under the messy, continuous rules of classical physics.
• 19:16
  Speaker 2: They're bumping into the fans.
• 19:17
  Speaker 3: Exactly. They generate heat, they bleed energy, and they are
• 19:20
  Speaker 3: constantly fighting against background noise. But Sakil notes that this
• 19:25
  Speaker 3: Stanford breakthrough represents unprecedented fine-tuned control over sound at the
• 19:31
  Speaker 3: ultimate fundamental limit of nature.
• 19:33
  Speaker 2: So if engineers can design acoustic smartphone chips that harness
• 19:36
  Speaker 2: these discrete quantum jumps, chips that operate with perfectly clean transitions,
• 19:42
  Speaker 2: zero energy bleed, and absolute microscopic precision.
• 19:46
  Speaker 3: We are paving the way for a vastly improved generation
• 19:48
  Speaker 3: of consumer devices. The invisible mechanics of the universe aren't
• 19:52
  Speaker 3: just academic curiosities confined to a chalkboard. The ability to
• 19:56
  Speaker 3: control phonons at the quantum level is the actual blueprint
• 20:00
  Speaker 3: for smartphones that are astronomically faster, batteries that last significantly longer,
• 20:05
  Speaker 3: and communication networks that never drop a signal.
• 20:07
  Speaker 2: Let's take a step back and look at the entire
• 20:09
  Speaker 2: journey we've gone on today. We started with an abstract
• 20:12
  Speaker 2: mathematical theory developed by the pioneers of quantum physics over
• 20:15
  Speaker 2: a century ago. This wild, counterintuitive idea that the universe
• 20:19
  Speaker 2: operates in rigid, sudden steps rather than smooth curves.
• 20:23
  Speaker 3: A staircase, not a ramp. Right.
• 20:25
  Speaker 2: And we watched scientists prove that math with isolated ions
• 20:28
  Speaker 2: in the 1980s and solitary photons of light in the 2000s.
• 20:31
  Speaker 2: And now, in 2026... Thanks to a two-millisecond microscopic tuning
• 20:38
  Speaker 2: fork carved into a silicon chip, human beings have finally
• 20:41
  Speaker 2: trapped and observed the discrete quantum jump of sound.
• 20:45
  Speaker 3: In doing so, we've crossed a major technological threshold. We
• 20:49
  Speaker 3: have taken a fragile, chaotic, collective wave of atoms and
• 20:53
  Speaker 3: successfully subjected it to perfect quantum control.
• 20:57
  Speaker 2: It's an incredible achievement.
• 20:58
  Speaker 3: It is. Whether that achievement eventually leads to flawless error-corrected
• 21:02
  Speaker 3: quantum computers... medical sensors capable of weighing a single disease-causing protein,
• 21:07
  Speaker 3: or just a vastly superior smartphone in your pocket, the
• 21:10
  Speaker 3: barrier of the macroscopic world has been fundamentally broken.
• 21:14
  Speaker 2: Learning about a breakthrough like this really makes you look
• 21:16
  Speaker 2: at your everyday environment differently, completely changes your relationship with
• 21:20
  Speaker 2: the physical world. And that brings me back to where
• 21:22
  Speaker 2: we started our conversation. I want you to think about
• 21:25
  Speaker 2: that massive bronze bell again.
• 21:27
  Speaker 3: The one fading out.
• 21:28
  Speaker 2: Yes. Think about that deep, resonant echo that seems to
• 21:32
  Speaker 2: fade so beautifully, so continuously into the air around you.
• 21:36
  Speaker 2: We now know definitively that the smooth fade is a lie.
• 21:39
  Speaker 3: It's a complete illusion.
• 21:40
  Speaker 2: It is an illusion painted by your brain over a
• 21:43
  Speaker 2: reality that is actually jagged, discreet, and jumping instantly into silence.
• 21:47
  Speaker 2: And if the fundamental building blocks of our noisy, chaotic
• 21:50
  Speaker 2: world actually operate in these discreet, rigid, silent steps... What
• 21:55
  Speaker 2: other smooth, continuous experiences in your everyday life are really
• 21:58
  Speaker 2: just an illusion hiding a rapid fire series of microscopic
• 22:02
  Speaker 2: quantum clicks?