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Reversing Quantum Chaos: Recovering Lost Information · The Quark Side - Quantum Physics Podcast

• 0:01
  Speaker 1: Welcome to the quart Side Quantum Physics Podcast, an exploration
• 0:05
  Speaker 1: of 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: Imagine a machine that has the power to cure complex
• 0:32
  Speaker 2: diseases in a weekend, or map the entire chemical history
• 0:36
  Speaker 2: of the universe.
• 0:37
  Speaker 3: Or even design flawless new synthetic materials totally from scratch.
• 0:42
  Speaker 2: I mean, it's the ultimate dream of quantum computing.
• 0:44
  Speaker 3: Right exactly. We are talking about a promise of processing
• 0:48
  Speaker 3: power that is so exponentially vast it basically makes our
• 0:53
  Speaker 3: current state of the art supercomputers look like like Wooden adbacuses.
• 0:57
  Speaker 2: Yeah, the leap is just that massive. It's complete paradigm shift.
• 1:01
  Speaker 3: But today our mission is to figure out what happens
• 1:03
  Speaker 3: when these supermachines just spontaneously scramble.
• 1:06
  Speaker 2: Their own brains, right the big catch?
• 1:07
  Speaker 3: Yeah, and more importantly, how a pair of physicist basically
• 1:11
  Speaker 3: just figured out how to hit the rewind button on
• 1:13
  Speaker 3: reality to actually.
• 1:14
  Speaker 2: Fix it, which is monumental. I mean, the stakes here
• 1:16
  Speaker 2: really can't be overstated. This is a technological leap that
• 1:20
  Speaker 2: redefines the boundaries of what humanity can even achieve.
• 1:23
  Speaker 3: Right, But we are staring down this massive, equally monumental hurdle.
• 1:29
  Speaker 3: You build this miraculous world changing machine, you give it
• 1:32
  Speaker 3: a brilliant, lightning fast calculation, and then right in the
• 1:36
  Speaker 3: middle of thinking, it just it loses the information.
• 1:39
  Speaker 2: You gave it. It just slips right through its digital singers.
• 1:43
  Speaker 2: I mean, we are dealing with a super genius machine
• 1:46
  Speaker 2: that is basically afflicted with a bizarre built in form
• 1:50
  Speaker 2: of temporary amnesia.
• 1:52
  Speaker 3: That's a really good way to put it. Temporary amnesia.
• 1:54
  Speaker 3: That is exactly the reality researchers are facing today.
• 1:57
  Speaker 2: And it's because the very mind bending rules of quantum
• 2:00
  Speaker 2: physics that give these computers their immense power, they also
• 2:05
  Speaker 2: make them incredibly frustratingly fragile.
• 2:07
  Speaker 3: Yeah, the information just gets completely scrambled.
• 2:09
  Speaker 2: So we need to explore exactly how scientists figured out
• 2:12
  Speaker 2: a way to unscramble it. Let's unpack the mechanics of
• 2:15
  Speaker 2: this MBSIA first. Yeah, because to understand how to rescue
• 2:18
  Speaker 2: lost data, I think we first have to understand how
• 2:21
  Speaker 2: it's stored in the first place, and why it is
• 2:24
  Speaker 2: so prone to.
• 2:24
  Speaker 3: Getting messy, right, we have to look at the foundation.
• 2:26
  Speaker 2: Yeah. Think about the device you are listening to this
• 2:28
  Speaker 2: on right now. You know, whether it's a phone, a laptop,
• 2:31
  Speaker 2: a tablet. It runs on a very strict, very comfortable
• 2:35
  Speaker 2: set of rules.
• 2:36
  Speaker 3: Because the classical realm of computing operates on extremely rigid boundaries,
• 2:41
  Speaker 3: and the foundation of that entire world, the building block.
• 2:46
  Speaker 2: Is the bit, right, the trusty bit, the fundamental unit
• 2:50
  Speaker 2: of classical information. It's essentially just a microscopic switch, right, exactly.
• 2:54
  Speaker 3: It is definitively either a zero or.
• 2:57
  Speaker 2: One offer on black or white.
• 2:58
  Speaker 3: Yeah, and it's reliable, specifically because it is so incredibly simple.
• 3:03
  Speaker 3: When you know, type a document or save a photo,
• 3:06
  Speaker 3: your device flips millions of these tiny switches into a
• 3:10
  Speaker 3: specific pattern of zeros in one.
• 3:11
  Speaker 2: And they stay exactly where you put them until you
• 3:13
  Speaker 2: decide to change them. They don't just wander off.
• 3:15
  Speaker 3: Right. Classical bits are very well behaved, but quantum computers
• 3:19
  Speaker 3: throw that comfortable rigidity entirely out the window.
• 3:21
  Speaker 2: They just toss it out completely.
• 3:23
  Speaker 3: Instead of bits, the fundamental unit in the quantum realm
• 3:27
  Speaker 3: is the quibbit, and thanks to the strange, the counterintuitive
• 3:31
  Speaker 3: rules of quantum mechanics. A quibit doesn't have to choose
• 3:35
  Speaker 3: between being a zero or a one.
• 3:37
  Speaker 2: It doesn't have to choose, which is so wild.
• 3:40
  Speaker 3: It can be a zero, it can be a one,
• 3:42
  Speaker 3: or crucially, it can be both at the exact same time.
• 3:45
  Speaker 3: This is that famous state known as superposition, which.
• 3:49
  Speaker 2: I mean that feels totally counterintuitive to how we experience
• 3:52
  Speaker 2: the physical world right now, because if you flip a coin,
• 3:54
  Speaker 2: it lands on heads.
• 3:55
  Speaker 3: Or tails, right, always one or the other.
• 3:57
  Speaker 2: The superposition is like watching that crane spin on the table.
• 4:00
  Speaker 2: While it's spinning, it's not really heads and it's not
• 4:03
  Speaker 2: really tails. It's this blur of both probabilities existing at once.
• 4:07
  Speaker 3: That's a perfect analogy, and if we scale that up,
• 4:10
  Speaker 3: the computing power becomes just staggering. Imagine, for instance, you
• 4:14
  Speaker 3: are trying to find your way out of a really
• 4:16
  Speaker 3: complex maze, okay, amaze. A classical computer using standard bits
• 4:21
  Speaker 3: has to walk down every single path one at a time.
• 4:23
  Speaker 3: It goes down a path, hits a dead end, turns around,
• 4:26
  Speaker 3: goes back and tries the next path.
• 4:28
  Speaker 2: Very methodical, but very slow exactly.
• 4:31
  Speaker 3: But a quantum computer utilizing those quibits in superposition. It
• 4:36
  Speaker 3: essentially floods the maze with water.
• 4:38
  Speaker 2: Oh wow.
• 4:39
  Speaker 3: Yeah, it explores every single path simultaneously. Because you have
• 4:43
  Speaker 3: all these quibbitts existing in these complex, overlapping states, they
• 4:46
  Speaker 3: can process massive, unimaginable amounts of possibilities all at once.
• 4:52
  Speaker 2: That's simultaneous processing is basically the holy grail of computing.
• 4:56
  Speaker 3: It really is.
• 4:57
  Speaker 2: But and here's the catch, That exact same comp perplexity
• 5:00
  Speaker 2: is what leads to the massive hurdle we are focusing
• 5:03
  Speaker 2: on today, quantum scrambling.
• 5:05
  Speaker 3: Yeah, the greatest strength of the system becomes its ultimate
• 5:08
  Speaker 3: weakness because in a quantum chip, you don't just have
• 5:11
  Speaker 3: one quibot working in.
• 5:13
  Speaker 2: Isolation, right, You need tons of them.
• 5:15
  Speaker 3: We have dozens or hundreds and eventually, you know, hopefully
• 5:18
  Speaker 3: millions of them. And for the computer to actually execute
• 5:20
  Speaker 3: its calculations, those quibbits have to interact. They have to connect,
• 5:24
  Speaker 3: talk to each other, exchange information dynamically.
• 5:27
  Speaker 2: And this connection that's entanglement.
• 5:29
  Speaker 3: Right, exactly, entanglement, And.
• 5:31
  Speaker 2: As they talk, things just get entirely out of hand.
• 5:35
  Speaker 2: Like you encode some specific precious piece of information into
• 5:39
  Speaker 2: a small cluster of these quibbits, your data right, your data.
• 5:44
  Speaker 2: But as the quibits interact and entangle with their neighbors,
• 5:47
  Speaker 2: that information doesn't just stay neatly put where you left it.
• 5:50
  Speaker 2: It begins to spread.
• 5:51
  Speaker 3: It ripples outward.
• 5:52
  Speaker 2: Yeah, it ripples through the entire network of quibbits on
• 5:55
  Speaker 2: the chip, and it keeps spreading, getting more and more diluted,
• 5:59
  Speaker 2: until it vanished. To any science is trying to read
• 6:03
  Speaker 2: the result, it becomes entirely lost.
• 6:05
  Speaker 3: And that scrambling effect is a fundamental roadblock in physics
• 6:09
  Speaker 3: right now, because historically, error correction in classical computers is pretty.
• 6:13
  Speaker 2: Easy, right, You just make copies.
• 6:14
  Speaker 3: Yeah, if a bit flips accidentally, you just keep backup
• 6:17
  Speaker 3: copies of the data and check against them. But in
• 6:20
  Speaker 3: quantum mechanics, the sheer act of looking at equibit to check.
• 6:23
  Speaker 2: Its status it breaks.
• 6:24
  Speaker 3: It doesn't it, Yes, It forces it to stop spinning
• 6:27
  Speaker 3: and pick aside. It collapses the superposition. You destroy the
• 6:31
  Speaker 3: very calculation you're actually trying to save.
• 6:33
  Speaker 2: So if you can't hold onto the information long enough
• 6:36
  Speaker 2: to read the answer, and you can't even look at
• 6:38
  Speaker 2: it to back it up, you don't really have a
• 6:40
  Speaker 2: functioning computer.
• 6:41
  Speaker 3: No, you just have a very expensive random noise generator.
• 6:44
  Speaker 2: Which is a problem. Yeah, But I've been thinking about
• 6:47
  Speaker 2: a way to visualize this concept of scrambling, because when
• 6:51
  Speaker 2: you hear that the information just spreads out, it sounds
• 6:53
  Speaker 2: almost gentle.
• 6:54
  Speaker 3: Right, kind of peaceful, Yeah.
• 6:57
  Speaker 2: But the reality is highly chaotic. Imagine you have a
• 7:01
  Speaker 2: glass of perfectly clear water. Okay, that's your pristine quantum chip.
• 7:06
  Speaker 2: Now you take a single drop of dark, heavy ink,
• 7:10
  Speaker 2: and that ink is the vital information you've encoded. You
• 7:13
  Speaker 2: let that drop fall into the glass. At first, you
• 7:17
  Speaker 2: can clearly see the drop. It's highly localized. It holds
• 7:20
  Speaker 2: its shape in the water.
• 7:21
  Speaker 3: But as the water molecules interact with the ink molecules,
• 7:25
  Speaker 3: which is very much like are quibets talking to each
• 7:27
  Speaker 3: other and tangling up, that ink starts to swirl and
• 7:30
  Speaker 3: drift exactly.
• 7:32
  Speaker 2: It disperses. Within just a few short moments. You don't
• 7:34
  Speaker 2: have a distinct drop of ink anymore. You just have
• 7:36
  Speaker 2: this slightly cloudy glass of water.
• 7:38
  Speaker 3: The information hasn't physically left the glass.
• 7:41
  Speaker 2: Yeah, but gathering it all back up into that single
• 7:44
  Speaker 2: pristine drop seems like an absolutely impossible task.
• 7:47
  Speaker 3: It seems irreversible, right, But.
• 7:49
  Speaker 2: I want to challenge this concept of the data being
• 7:52
  Speaker 2: quote unquote lost because you know, I know what happens
• 7:56
  Speaker 2: when my standard classical laptop loses data.
• 8:00
  Speaker 3: We've all been there, right, If.
• 8:02
  Speaker 2: My hard drive corrupts or a sector fails or something
• 8:05
  Speaker 2: gets overwritten, the physical state of the machine has essentially
• 8:09
  Speaker 2: destroyed the data.
• 8:10
  Speaker 3: Yeah, it's gone.
• 8:11
  Speaker 2: So if the information in the quantum computer is just
• 8:13
  Speaker 2: too spread out to read like the cloudy ink in
• 8:16
  Speaker 2: the water, how is this actually different from regular data corruption?
• 8:20
  Speaker 2: Is it truly gone or is it just like hiding?
• 8:23
  Speaker 3: That distinction right there is profound. The difference between classical
• 8:26
  Speaker 3: corruption and quantum scrambling is night and day. Okay, how so,
• 8:30
  Speaker 3: when your laptop corrupts a file, there is often a
• 8:32
  Speaker 3: real physical degradation, like a magnetic domain flipped the wrong
• 8:36
  Speaker 3: way or a microscopic capacitor leaked its charge. The hardware
• 8:39
  Speaker 3: failed exactly, the data was physically damaged. It is dead.
• 8:44
  Speaker 3: But in the quantum realm, during this scrambling process, the
• 8:48
  Speaker 3: information is definitively not destroyed.
• 8:51
  Speaker 2: It's still there.
• 8:51
  Speaker 3: It is simply dispersed in an incredibly complex, highly entangled
• 8:56
  Speaker 3: web across many many interacting particles.
• 9:00
  Speaker 2: Is just lost in the noise. Yeah, it's mathematically encoded
• 9:03
  Speaker 2: in the totality of the system, but it's just completely
• 9:06
  Speaker 2: inaccessible to any local measurement.
• 9:08
  Speaker 3: Yes, it's as if someone took a highly sensitive, top
• 9:11
  Speaker 3: secret document, ran it through shredder, cut it into single letters,
• 9:15
  Speaker 3: and then scattered those letters evenly across an entire city.
• 9:19
  Speaker 3: Oh wow, the document is not erased from existence, but
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  Speaker 3: reading it practically impossible.
• 9:24
  Speaker 2: We basically have a city full of scattered letters or
• 9:27
  Speaker 2: glass of cloudy water. The information is technically there, but
• 9:30
  Speaker 2: utterly useless to us.
• 9:31
  Speaker 3: Utterly useless. And this is exactly where the narrative shifts
• 9:34
  Speaker 3: completely thanks to two physicists at the University of California.
• 9:37
  Speaker 2: Irvine, right, Assistant Professor Thomas Scaffiti and his graduate student
• 9:42
  Speaker 2: Rishik Prugu.
• 9:43
  Speaker 3: Yes, their approach to this problem flips the perspective entirely
• 9:48
  Speaker 3: because they didn't try to build a wall to stop
• 9:50
  Speaker 3: the ink from spreading.
• 9:52
  Speaker 2: Which is what a lot of people were trying to do, right,
• 9:54
  Speaker 2: just keep the.
• 9:54
  Speaker 3: Noise out exactly. Instead, they asked if the fundamental laws
• 9:57
  Speaker 3: of physics might actually allow them to force the ink
• 10:00
  Speaker 3: back into a.
• 10:01
  Speaker 2: Drop, which sounds like magic, but they relied on this
• 10:05
  Speaker 2: very subtle underlying feature of quantum physics. It turns out
• 10:09
  Speaker 2: that the microscopic laws governing these particles are in principle
• 10:14
  Speaker 2: completely reversible.
• 10:15
  Speaker 3: Yeah, at the most fundamental level, the equations describing how
• 10:19
  Speaker 3: quantum particles interact, they don't actually care which direction time
• 10:22
  Speaker 3: is flowing.
• 10:23
  Speaker 2: Skeffity used this really vivid analogy to explain this time symmetry.
• 10:27
  Speaker 2: He said, imagine you're watching a movie of two microscopic
• 10:30
  Speaker 2: particles flying toward each other, colliding, and then bouncing off. Okay,
• 10:34
  Speaker 2: if you took that movie and played it forward, it
• 10:36
  Speaker 2: would make perfect sense. And if you hit rewind and
• 10:38
  Speaker 2: played the exact same movie backward, it would still look
• 10:41
  Speaker 2: completely sensible. The laws of physics are obeyed in both directions.
• 10:45
  Speaker 3: Because there is no obvious forward or backward at that
• 10:49
  Speaker 3: fundamental microscopic scale exactly, So every single interaction that scrambles
• 10:54
  Speaker 3: the information is inherently a two way street. The collision
• 10:58
  Speaker 3: that hangled the particles together can be perfectly mirrored by
• 11:01
  Speaker 3: a collision that untangles them.
• 11:03
  Speaker 2: Okay, I have to push back on this reversibility idea
• 11:05
  Speaker 2: for a second, because it clashes so hard with reality. Sure,
• 11:09
  Speaker 2: think about the last time you dropped a coffee mug.
• 11:11
  Speaker 2: For you and me, time is a relentless one way street.
• 11:15
  Speaker 3: Unfortunately, yes, right, yes.
• 11:17
  Speaker 2: If I accidentally spill my coffee across the table, the
• 11:20
  Speaker 2: liquid does not spontaneously gather itself back up and jump
• 11:23
  Speaker 2: perfectly into the mug.
• 11:24
  Speaker 3: It definitely doesn't.
• 11:26
  Speaker 2: The movie of a shattering mug looks completely absurd. If
• 11:29
  Speaker 2: you play it backward, you know immediately that it's in reverse.
• 11:32
  Speaker 2: So why did these microscopic particles get a free pass?
• 11:35
  Speaker 2: Why do they get to play by a set of
• 11:36
  Speaker 2: rules where the movie can just casually play in reverse?
• 11:39
  Speaker 3: Well, this touches on one of the great historical debates
• 11:41
  Speaker 3: and physics. Actually, the difference really lies between macro chaos
• 11:46
  Speaker 3: and micro precision.
• 11:47
  Speaker 2: Okay, unpack that.
• 11:48
  Speaker 3: Let's look closely at your spilled coffee. A splash of
• 11:51
  Speaker 3: coffee is not too simple. Particles is composed of trillions
• 11:55
  Speaker 3: upon trillions of interacting.
• 11:57
  Speaker 2: Atoms, right, it's huge.
• 11:59
  Speaker 3: When it's spilled, the kinetic energy disperses into sound, into heat,
• 12:03
  Speaker 3: and chaotic motion across the entire table. There are nearly
• 12:08
  Speaker 3: infinite ways for those trillions of atoms to represent a
• 12:11
  Speaker 3: spilled puddle. Sure, but there is only one incredibly specific
• 12:15
  Speaker 3: way for them to represent a hot cup of coffee
• 12:18
  Speaker 3: resting peacefully in a mug.
• 12:20
  Speaker 2: Right, So the statistical odds of all those trillions of
• 12:22
  Speaker 2: atoms spontaneously deciding to jump back into a perfect unified
• 12:27
  Speaker 2: shape are functionally zero exactly.
• 12:30
  Speaker 3: That is the inescapable march of entropy. At the macroscopic scale,
• 12:34
  Speaker 3: the sheer overwhelming number of particles creates a statistical certainty
• 12:38
  Speaker 3: that things will move from order to disorder.
• 12:41
  Speaker 2: So the mug breaks, the coffee spills.
• 12:43
  Speaker 3: But when we zoom all the way down to a
• 12:44
  Speaker 3: few isolated quantum particles that microprecision level, that statistical inevitability
• 12:49
  Speaker 3: hasn't taken over yet. I see, you are dealing with clean,
• 12:52
  Speaker 3: fundamental interactions. So while you cannot unspill coffee made of
• 12:57
  Speaker 3: trillions of atoms, the math dictates that if you have
• 13:00
  Speaker 3: carefully controlled quantum system, the interactions between those specific isolated
• 13:05
  Speaker 3: quibits can be physically run in reverse.
• 13:08
  Speaker 2: Because the system is so fundamental in small scale, the
• 13:11
  Speaker 2: scrambled data is not a permanent deletion like a burned
• 13:14
  Speaker 2: hard driver or a smashed mug. It's really just a
• 13:17
  Speaker 2: solvable puzzle.
• 13:18
  Speaker 3: Yes, the ink in the water is still governed by
• 13:21
  Speaker 3: rules that allow the ink to reform into a pristine drop.
• 13:25
  Speaker 2: Which is incredible. But recognizing that the microscopic interactions are
• 13:29
  Speaker 2: fundamentally reversible, I mean it means the scrambling isn't a
• 13:33
  Speaker 2: death sentence for the data.
• 13:34
  Speaker 3: No, it's not. That data has simply taken a very
• 13:37
  Speaker 3: complex journey. And if you know the exact mathematical path
• 13:40
  Speaker 3: it took, physics doesn't explicitly forbid you from marching it
• 13:43
  Speaker 3: right back to where it started.
• 13:45
  Speaker 2: But and this is a big butt. Knowing that the
• 13:47
  Speaker 2: universe merely allows for a rewind button is entirely different
• 13:51
  Speaker 2: from actually knowing how to press it.
• 13:52
  Speaker 3: Oh, totally theory versus practice, right, And.
• 13:55
  Speaker 2: That brings us to the actual fix they proposed. And
• 13:58
  Speaker 2: there's a really interesting human lament to this discovery. The
• 14:02
  Speaker 2: project had actually stalled for a period of time.
• 14:05
  Speaker 3: Yeah, Scaffiti openly mentioned that they hit a wall. The
• 14:08
  Speaker 3: research is just stuck.
• 14:09
  Speaker 2: It wasn't until Rishik Purugu, his graduate student, joined the
• 14:13
  Speaker 2: research group, that the project got a massive injection of
• 14:17
  Speaker 2: new momentum.
• 14:18
  Speaker 3: Because Perugu was the one who managed to really sit
• 14:21
  Speaker 3: down and perform the incredibly complex calculations to reveal exactly
• 14:26
  Speaker 3: how this scrambling could be reversed mathematically.
• 14:29
  Speaker 2: Which is a brilliant reminder of how collaborative scientific progress
• 14:33
  Speaker 2: actually is. Yeah, it often takes a fresh mind looking
• 14:35
  Speaker 2: at the equations to unlock a mathematical roadblock that has
• 14:39
  Speaker 2: stopped everyone else.
• 14:40
  Speaker 3: Absolutely, and that mathematical proof was so definitive in groundbreaking
• 14:44
  Speaker 3: it became the centerpiece of their publication in the journal
• 14:46
  Speaker 3: Physical Review Letters.
• 14:48
  Speaker 2: Right and Perugu discovered something vital during these calculations too.
• 14:52
  Speaker 2: He found that this reversible behavior isn't just a quirky
• 14:55
  Speaker 2: anomaly in one specific type of quantum setup.
• 14:58
  Speaker 3: No, it's much bigger than that universal.
• 15:00
  Speaker 2: Property that appears across many different quantum systems.
• 15:04
  Speaker 3: And uncovering a universal property gives the scientific community a
• 15:07
  Speaker 3: generalized framework to work from. They didn't just solve the
• 15:11
  Speaker 3: problem for one specific machine made of say, superconducting loops.
• 15:15
  Speaker 2: They uncovered a fundamental behavior of quantum information dynamics itself exactly.
• 15:20
  Speaker 3: It applies to trapped ions, silicon spin quibets, and various
• 15:24
  Speaker 3: other architectures people are testing.
• 15:26
  Speaker 2: But the big question remains, how do they actually hit rewind.
• 15:30
  Speaker 2: How do you practically mathematically unmix the ink?
• 15:33
  Speaker 3: Well, the solution they mapped out involves counteracting the quantum
• 15:36
  Speaker 3: scrambling with what they call a precisely tuned intervention.
• 15:39
  Speaker 2: A precisely tuned intervention.
• 15:41
  Speaker 3: Yeah. By applying this specific targeted intervention, you effectively drive
• 15:46
  Speaker 3: the entire quantum system backward.
• 15:48
  Speaker 2: Okay.
• 15:49
  Speaker 3: The dispersed chaotic information is forced to retrace its steps,
• 15:52
  Speaker 3: refocusing and gathering back together right near where it originally started.
• 15:56
  Speaker 2: So you are essentially taking the mathematical equation that controls
• 16:01
  Speaker 2: the system's energy, like the blueprint of how the quibots
• 16:04
  Speaker 2: evolve over time, and forcing it to operate in reverse.
• 16:08
  Speaker 3: That's right. It's like finding the master gear that drives
• 16:10
  Speaker 3: a very complex clock forward and applying a highly specific
• 16:14
  Speaker 3: force to turn it in the exact opposite direction.
• 16:17
  Speaker 2: But what does that physical intervention actually look like? Like?
• 16:20
  Speaker 2: Are we talking about hitting the quibitts with a tiny hammer?
• 16:23
  Speaker 3: Uh? No, tiny hammers. In a practical quantum computer, intervening
• 16:28
  Speaker 3: usually involves applying highly calibrated.
• 16:30
  Speaker 2: Bursts of energy bursts of energy Okay.
• 16:32
  Speaker 3: Yeah, Depending on the type of quibts being used, researchers
• 16:36
  Speaker 3: might fire a perfectly timed sequence of microwave pulses or
• 16:39
  Speaker 3: use precisely targeted lasers. Lasers, Yeah, lasers. These pulses manipulate
• 16:45
  Speaker 3: the magnetic spin of the quibots. So by hitting the
• 16:47
  Speaker 3: system with the exact right sequence of energy bursts, you
• 16:51
  Speaker 3: flip the momentum of the interactions.
• 16:53
  Speaker 2: You force the entangled particles to run their energetic exchange
• 16:56
  Speaker 2: in reverse.
• 16:56
  Speaker 3: Step by step, untangling the information.
• 16:59
  Speaker 2: That sounds like engineering nightmare.
• 17:00
  Speaker 1: Oh it is.
• 17:01
  Speaker 2: I mean the phrase precisely tuned intervention is doing a
• 17:04
  Speaker 2: massive amount of heavy lifting here. Yeah, let's go back
• 17:07
  Speaker 2: to my glass of water with the dispersed ink. Sure,
• 17:10
  Speaker 2: if I want to reverse that process using this concept,
• 17:13
  Speaker 2: I can't just stir the water backward with a spoon,
• 17:16
  Speaker 2: The math says, I need a precise intervention. Right to me,
• 17:20
  Speaker 2: that sounds like trying to create a perfectly timed, completely customized,
• 17:25
  Speaker 2: microscopic gust of wind inside the water to blow every
• 17:29
  Speaker 2: single individual ink molecule perfectly back into a single drop
• 17:34
  Speaker 2: at the exact center of the glass.
• 17:35
  Speaker 3: Honestly, that captures the sheer scale of the difficulty perfectly.
• 17:38
  Speaker 3: You have to account for every single interaction that took
• 17:41
  Speaker 3: place and apply the exact right counterforce.
• 17:43
  Speaker 2: The math clearly works on paper, and Burugu proved that
• 17:47
  Speaker 2: beyond a doubt. But actually building a machine to shoot
• 17:49
  Speaker 2: the perfect sequence of lasers or microwaves to execute this
• 17:52
  Speaker 2: perfect intervention without accidentally bumping something else and creating even
• 17:56
  Speaker 2: more chaos, it seems unbelievably difficult.
• 17:59
  Speaker 3: It is you would need an unprecedented level of control
• 18:02
  Speaker 3: over the physical world, and Scaffiti acknowledges this caveat completely.
• 18:06
  Speaker 3: He noted that while it is definitively possible to reverse
• 18:10
  Speaker 3: the scrambling, it requires an extremely fine tuned level of
• 18:13
  Speaker 3: control on the system. The gap between a theoretical proof
• 18:17
  Speaker 3: and the engineering reality is vast. Trying to catch every
• 18:22
  Speaker 3: ink particle and reverse its trajectory perfectly is a monumental
• 18:27
  Speaker 3: physical task. If your microwave pulses off by even a
• 18:31
  Speaker 3: microscopic fraction of a second, or your laser is slightly misaligned.
• 18:35
  Speaker 2: You don't reverse the scrambling.
• 18:36
  Speaker 3: No, you just scramble it further.
• 18:38
  Speaker 2: You are just during the cloudy water even more aggressively,
• 18:41
  Speaker 2: basically creating more noise.
• 18:43
  Speaker 3: Precisely the danger. However, looking at how scientific leaps historically
• 18:47
  Speaker 3: happen changes the context here. Proving that the underlying rules
• 18:51
  Speaker 3: of the universe allow for this. Proving that reversibility is
• 18:53
  Speaker 3: a universal property is the mandatory first step.
• 18:56
  Speaker 2: It profoundly shifts the nature of the entire problem. It
• 18:59
  Speaker 2: does moves the goalposts from impossible according to the laws
• 19:02
  Speaker 2: of physics to just really really hard for engineers to build.
• 19:07
  Speaker 3: Exactly. It changes from a fundamental roadblock in nature to
• 19:11
  Speaker 3: a practical engineering hurdle, and human beings have a phenomenal
• 19:15
  Speaker 3: track record of solving engineering hurdles given enough time.
• 19:18
  Speaker 2: That's true. Think about the trajectory of classical computers, right.
• 19:21
  Speaker 3: We went from giant, fragile vacuum tubes that burned out
• 19:24
  Speaker 3: every few hours and filled entire rooms to packing billions
• 19:28
  Speaker 3: of microscopic transistors onto a reliable chip the size of
• 19:32
  Speaker 3: your fingernail.
• 19:33
  Speaker 2: It's wild when you think about it.
• 19:35
  Speaker 3: Achieving that fine tuned quantum control, you know, the perfect
• 19:39
  Speaker 3: sequence of laser pulses, that is the grand engineering challenge
• 19:43
  Speaker 3: of the next few decades. Knowing the information can be
• 19:46
  Speaker 3: coaxed back to its origin means building reliable error correcting
• 19:50
  Speaker 3: quantum computers is actually a realistic destination.
• 19:53
  Speaker 2: Now it really alters the entire landscape of quantum computing.
• 19:57
  Speaker 2: We started with this incredible promise of machines capable of
• 20:00
  Speaker 2: revolutionizing medicine and material science, but it was immediately overshadowed
• 20:03
  Speaker 2: by this crippling problem of quantum scrambling.
• 20:06
  Speaker 3: Right, we had this maddening tendency for a super advanced
• 20:10
  Speaker 3: machine to simply lose its own data in a web
• 20:13
  Speaker 3: of its own complex interactions.
• 20:15
  Speaker 2: The information spreading out like ink and water, becoming practically
• 20:19
  Speaker 2: invisible and functionally useless to the scientist trying to read it.
• 20:23
  Speaker 2: But by leaning into the microscopic laws of physics, Thomas
• 20:26
  Speaker 2: Scaffiti and Rushik Perugu proved that time and chaos at
• 20:30
  Speaker 2: that tiny scale are two way streets. They mapped out
• 20:33
  Speaker 2: the complex math to show that with a perfectly executed intervention,
• 20:38
  Speaker 2: a flawless burst of energy, you can actually force that
• 20:42
  Speaker 2: dispersed data to gather back to its starting point.
• 20:44
  Speaker 3: You can effectively hit rewind on reality.
• 20:47
  Speaker 2: They took a physics impossibility and transformed it into an
• 20:50
  Speaker 2: engineering roadmap, which is a profound shift in how we
• 20:53
  Speaker 2: understand the life cycle of information itself. It really is
• 20:56
  Speaker 2: and it leaves you with such a massive, mind expanding
• 20:59
  Speaker 2: concept to you on long after you hear it. I mean,
• 21:02
  Speaker 2: if fundamental physics dictates that at a microscopic level, this complex,
• 21:07
  Speaker 2: entirely scattered information isn't actually destroyed, that it's just dispersed
• 21:12
  Speaker 2: patiently waiting for the exact right intervention to hit rewind
• 21:16
  Speaker 2: and bring it all back together. What else in the
• 21:19
  Speaker 2: universe do we simply assume is permanently lost just because
• 21:23
  Speaker 2: we haven't figured out how to hit reverse yet.
• 21:25
  Speaker 3: It makes you wonder how much of the universe's history
• 21:28
  Speaker 3: is still written in the noise, just waiting for us
• 21:30
  Speaker 3: to develop the tools to read it.
• 21:32
  Speaker 2: Keep questioning the things that seem permanent around you, Keep
• 21:35
  Speaker 2: looking closer, because the rules always change when you dig
• 21:38
  Speaker 2: deep enough