Latest / The Quark Side - Quantum Physics Podcast / A Major Step Toward Stable Quantum Data Storage

Transcript

A Major Step Toward Stable Quantum Data Storage · The Quark Side - Quantum Physics Podcast

• 0:01
  Speaker 1: Welcome to the coret 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: I want you to try something with me today. It's
• 0:29
  Speaker 2: a little mental exercise to get us started.
• 0:31
  Speaker 3: Okay, I'm in.
• 0:32
  Speaker 2: I want you to close your eyes seriously, unless you are,
• 0:36
  Speaker 2: you know, currently operating heavy machinery or driving down the freeway.
• 0:41
  Speaker 2: Just close them for a second.
• 0:42
  Speaker 3: Safety first, please, But if you're safe, go for it
• 0:45
  Speaker 3: right exactly.
• 0:46
  Speaker 2: So picture your warning routine. You know the drill. You
• 0:49
  Speaker 2: walk into that coffee shop you love.
• 0:51
  Speaker 3: Uh huh, I can see it now.
• 0:53
  Speaker 2: You know the one I'm talking about. It's always just
• 0:55
  Speaker 2: a little bit too loud. The grinder is going in
• 0:57
  Speaker 2: the background, and it smells like roasted beans and maybe
• 1:01
  Speaker 2: a hint of rain if it's a gloomy day.
• 1:03
  Speaker 3: Mm hm.
• 1:04
  Speaker 2: You walk up to the counter and you order a latte.
• 1:06
  Speaker 3: The classic choice, very good.
• 1:08
  Speaker 2: The classic, and the barista who clearly takes their craft
• 1:12
  Speaker 2: very very seriously.
• 1:13
  Speaker 3: Oh yeah, the one with the wax mustache and the
• 1:15
  Speaker 3: denim aper.
• 1:16
  Speaker 2: That's the one. The whole vibe. They pour that steamed
• 1:19
  Speaker 2: milk into the dark espresso and they do that specific
• 1:22
  Speaker 2: little wrist flick at the end. You know what I'm
• 1:24
  Speaker 2: talking about.
• 1:25
  Speaker 3: The poor It's mesmerizing to watch it, really is it is.
• 1:29
  Speaker 2: And boom there it is a perfect tulip pattern in
• 1:32
  Speaker 2: the foam, crisp white lines against the dark coffee. It's symmetry,
• 1:38
  Speaker 2: it's structure.
• 1:39
  Speaker 3: It's a little piece of art that you are about
• 1:41
  Speaker 3: to destroy.
• 1:42
  Speaker 2: Exactly. It is beautiful and it's fleeting, so fleeting. Right
• 1:46
  Speaker 2: now here is the experiment. Keep your eyes closed. Imagine
• 1:49
  Speaker 2: taking that cup but it's hot in your hand and
• 1:52
  Speaker 2: just giving it a violent swirl. Okay, I mean really
• 1:55
  Speaker 2: shake it, agitate the whole thing. What happens to the tulip.
• 1:57
  Speaker 3: Well, obviously it's obliterated. You don't have a tulip anymore.
• 2:01
  Speaker 3: You have a beige, frothy mess. The milk mixes with
• 2:05
  Speaker 3: the coffee, the pattern dissolves, and you are left with
• 2:08
  Speaker 3: a tasty, but you know, visually boring drink.
• 2:11
  Speaker 2: Right. That is what our intuition tells us. That is
• 2:14
  Speaker 2: what common sense tells us. That is what's seeing the
• 2:16
  Speaker 2: world every day tells us things mix, things mix, order
• 2:19
  Speaker 2: turns into chaos. The tulip does not survive the swirl.
• 2:24
  Speaker 2: It can't.
• 2:25
  Speaker 3: It's the law of the universe, or at least the
• 2:27
  Speaker 3: law of the kitchen table.
• 2:28
  Speaker 2: What if I told you that in the quantum world,
• 2:30
  Speaker 2: that logic just got completely flipped on its head.
• 2:32
  Speaker 3: And this is where we leave the kitchen table behind.
• 2:34
  Speaker 2: This is where it gets weird. Imagine you swirl that cup,
• 2:38
  Speaker 2: you shake it, you tap it, you disturb it, and
• 2:41
  Speaker 2: you look down and the tulip is still there. Oh wow,
• 2:44
  Speaker 2: perfectly crisp every petal, define. It refuses to mix, it
• 2:49
  Speaker 2: refuses to blend, It just stays.
• 2:52
  Speaker 3: That is a perfect visualization of what we were talking
• 2:55
  Speaker 3: about today. It sounds like magic or maybe a glitch
• 2:58
  Speaker 3: in the simulation, right, it does. But it's actually a
• 3:00
  Speaker 3: major breakthrough in physics known as statistical localization.
• 3:04
  Speaker 2: And this isn't science fiction. This isn't a theory from
• 3:06
  Speaker 2: fifty years ago that we're digging up. This is coming
• 3:09
  Speaker 2: directly from a study published literally yesterday, February eighteenth, twenty
• 3:14
  Speaker 2: twenty six. That's brand new, brand new, in the journal
• 3:17
  Speaker 2: Nature Physics, and it's coming out of Duke University.
• 3:20
  Speaker 3: That's right. It's fresh research and it is challenging some
• 3:23
  Speaker 3: of our most i mean our most fundamental assumptions about
• 3:25
  Speaker 3: how matter behaves when you start looking really really closely
• 3:29
  Speaker 3: at it.
• 3:29
  Speaker 2: So today, that's our whole journey. We are going to
• 3:32
  Speaker 2: unpack how a team of scientists use a quantum simulator,
• 3:37
  Speaker 2: which by the way, sounds as something straight out of
• 3:39
  Speaker 2: a sci fi movie, it really does to essentially freeze
• 3:42
  Speaker 2: the state of matter in a way that just shouldn't
• 3:44
  Speaker 2: be possible.
• 3:45
  Speaker 3: And we need to be clear from the top. This
• 3:48
  Speaker 3: isn't just a cool party trick for atoms. This isn't
• 3:51
  Speaker 3: just hey, look at this weird thing we found. This
• 3:54
  Speaker 3: is a big deal. It's potentially the key to solving
• 3:57
  Speaker 3: one of the biggest bottlenecks in quantum computing, which is
• 4:00
  Speaker 3: memory storage.
• 4:01
  Speaker 2: And if that wasn't enough, it might even help us
• 4:03
  Speaker 2: understand the fundamental forces that hold the entire universe together.
• 4:07
  Speaker 3: It connects the very small to the very big. It's
• 4:10
  Speaker 3: the bridge between the micro and the macro.
• 4:12
  Speaker 2: So grab your coffee, don't swirl it too hard or
• 4:14
  Speaker 2: it maybe do. Just to prove physics still works in
• 4:17
  Speaker 2: your kitchen, and let's get into it.
• 4:18
  Speaker 3: Let's do it.
• 4:19
  Speaker 2: To understand why this frozen latte effect is so profoundly weird,
• 4:23
  Speaker 2: we first have to understand what's supposed to happen. You
• 4:26
  Speaker 2: mentioned earlier that the tulip disappearing is obvious. Why is that?
• 4:30
  Speaker 2: What is the physics behind the beige mess?
• 4:33
  Speaker 3: So in the classical world, the world we live in
• 4:36
  Speaker 3: the world of coffee cups and tables and cars, we
• 4:40
  Speaker 3: are governed by a concept called thermalization.
• 4:43
  Speaker 2: Thermalization, Okay, let's unpack that word. It sounds like it
• 4:46
  Speaker 2: has something to do with heat.
• 4:48
  Speaker 3: It does, but it's really about equilibrium, about things evening out.
• 4:53
  Speaker 3: Think about dropping a single drop of dark blue ink
• 4:56
  Speaker 3: into a glass of clear water.
• 4:59
  Speaker 2: Okay, when you.
• 4:59
  Speaker 3: First drop it in, for that first split second, it's
• 5:02
  Speaker 3: a tight little ball of color. It has a specific location.
• 5:05
  Speaker 3: It's organized right.
• 5:07
  Speaker 2: You can point to it and say the ink is
• 5:08
  Speaker 2: right there exactly.
• 5:09
  Speaker 3: But if you walk away and come back in, say
• 5:11
  Speaker 3: ten minutes, what do you see.
• 5:13
  Speaker 2: The water is just light blue. It's all spread out.
• 5:17
  Speaker 2: You can't tell where the drop landed anymore. The blob
• 5:19
  Speaker 2: is totally gone.
• 5:20
  Speaker 3: Precisely, the ink molecules have moved. They've gone from an
• 5:23
  Speaker 3: area of high concentration that initial drop, to an area
• 5:26
  Speaker 3: of low concentration the rest of the water they've spread
• 5:29
  Speaker 3: out until everything.
• 5:31
  Speaker 2: Is equal homogenized.
• 5:32
  Speaker 3: That is equilibrium, and that process is thermalization.
• 5:36
  Speaker 2: It's the same with temperature, right, that's the thermal part
• 5:39
  Speaker 2: of the word.
• 5:40
  Speaker 3: Yes. The source material uses this great simple example of
• 5:44
  Speaker 3: a glass of ice water sitting on your kitchen table.
• 5:46
  Speaker 3: You leave it there, right, The heat from the room
• 5:49
  Speaker 3: transfers to the glass, the ice melts, the water warms up.
• 5:52
  Speaker 3: Eventually the water, the glass, and the air in the
• 5:55
  Speaker 3: room are all roughly the same temperature. They've reached equilibrium.
• 6:00
  Speaker 2: Everything wants to settle down, Everything wants to mix. It's
• 6:03
  Speaker 2: like the universe has this deep seated hatred of distinct things.
• 6:08
  Speaker 2: It wants everything to be a lukewarm soup.
• 6:10
  Speaker 3: That's a pretty good way to put it. This is
• 6:12
  Speaker 3: all rooted in energy transport, energy moves. It flows from
• 6:16
  Speaker 3: hot to cold, from organized to disorganized. In classical physics,
• 6:20
  Speaker 3: systems naturally evolve toward this state of equilibrium.
• 6:24
  Speaker 2: It's predictable. It's what we see every single day. Honestly,
• 6:27
  Speaker 2: it's kind of comforting. Isn't it.
• 6:28
  Speaker 3: It is comforting. We know that if we put something
• 6:30
  Speaker 3: hot next to something cold, they'll meet in the middle.
• 6:33
  Speaker 3: It makes sense.
• 6:33
  Speaker 2: It's the arrow of time in a way. You can't
• 6:36
  Speaker 2: unmix the ink. You can't unmelt the ice. No, once
• 6:39
  Speaker 2: the latte is beige, you can't just shake it and
• 6:42
  Speaker 2: get a perfect tool.
• 6:43
  Speaker 3: Look back exactly. It's an irreversible process.
• 6:45
  Speaker 2: But here comes the butt. I knew there was a
• 6:49
  Speaker 2: butt coming.
• 6:50
  Speaker 3: But this is not always how things behave. When you
• 6:52
  Speaker 3: zoom in way way into the atomic and subatomic scales,
• 6:56
  Speaker 3: the quantum realm, the.
• 6:58
  Speaker 2: Quantum realm where the rules are and the points don't matter,
• 7:01
  Speaker 2: or rather, the points matter a lot, but the rules
• 7:04
  Speaker 2: are completely different from our intuition.
• 7:06
  Speaker 3: They are definitely different. At this scale, we encounter a
• 7:09
  Speaker 3: phenomenon called localization localization.
• 7:12
  Speaker 2: Okay, so contrast that with thermalization. For me, if thermalization
• 7:16
  Speaker 2: is all about mixing and spreading.
• 7:17
  Speaker 3: Out, localization is the opposite. It's about staying put. So
• 7:21
  Speaker 3: if thermalization is the ink spreading out to fill the
• 7:23
  Speaker 3: entire glass, localization is the ink drop hitting the water
• 7:27
  Speaker 3: and just staying there, staying as a drop, as a
• 7:30
  Speaker 3: perfect tight little blue sphere, just suspended in the clear water.
• 7:34
  Speaker 2: Why is there something holding it there?
• 7:37
  Speaker 3: That's the weird part. Nothing is holding it. There are
• 7:39
  Speaker 3: no walls keeping it there. It just doesn't spread.
• 7:41
  Speaker 2: It feels wrong, like physically viscerally wrong. My brain doesn't
• 7:46
  Speaker 2: like that.
• 7:47
  Speaker 3: It feels very wrong. The source describes it as a
• 7:51
  Speaker 3: situation where equilibrium spreading does not occur, even with nothing
• 7:55
  Speaker 3: obviously preventing it.
• 7:57
  Speaker 2: So it's just stubborn. The ink is just refue using
• 8:00
  Speaker 2: to participate in the laws of physics as we know.
• 8:02
  Speaker 3: Them in a way. Yes, the energy transport we talked
• 8:06
  Speaker 3: about before, it just stops. Yeah, the system retains a
• 8:09
  Speaker 3: memory of its original state the ink drop forever, instead
• 8:13
  Speaker 3: of forgetting it and becoming a uniform mix.
• 8:16
  Speaker 2: It remembers where it started.
• 8:17
  Speaker 3: It remembers it doesn't thermalize.
• 8:19
  Speaker 2: Okay, So that's the baseline weirdness of quantum localization. This
• 8:23
  Speaker 2: isn't a brand new idea, right. Physicists have known about
• 8:26
  Speaker 2: this concept for a little while.
• 8:27
  Speaker 3: Correct. We've known about standard localization often it's called Anderson
• 8:30
  Speaker 3: localization for decades. Usually happens when there's a lot of
• 8:34
  Speaker 3: disorder or sort of dirt in a system that ends
• 8:37
  Speaker 3: up trapping the particles.
• 8:39
  Speaker 2: Like potholes in a road that stop traffic.
• 8:41
  Speaker 3: That's a great analogy. Yeah, but this new paper from
• 8:44
  Speaker 3: Duke is talking about something even more specific and frankly
• 8:46
  Speaker 3: even weirder, isn't it. It's statistical localization.
• 8:49
  Speaker 2: Right, and that's the new discovery.
• 8:51
  Speaker 3: Yes, And to understand that, we really need to look
• 8:54
  Speaker 3: at the experiment itself, because they didn't just stumble upon this.
• 8:59
  Speaker 3: They had to build a very very complex machine to
• 9:02
  Speaker 3: even see it.
• 9:03
  Speaker 2: This wasn't something they just found lying around in nature.
• 9:06
  Speaker 2: They had to engineer it precisely. Let's talk about the team.
• 9:09
  Speaker 2: We have huonkin Low, she's an assistant professor of electrical
• 9:13
  Speaker 2: and computer engineering and physics at Duke.
• 9:15
  Speaker 3: And her colleagues, including Natalie Palko, who will definitely hear
• 9:19
  Speaker 3: about later when we get to the theory side of things.
• 9:22
  Speaker 3: It's a multidisciplinary effort, which is key here.
• 9:25
  Speaker 2: And they build something called a neutral atom quantum simulator. Now,
• 9:29
  Speaker 2: when I hear simulator, I'm thinking of software. I'm thinking
• 9:31
  Speaker 2: of like the SIMS or a flight simulator on a PC. Right,
• 9:35
  Speaker 2: But that's not what this is at all, is No,
• 9:37
  Speaker 2: not at all.
• 9:38
  Speaker 3: This is a piece of hardware. The source material calls
• 9:41
  Speaker 3: it a tabletop setup. But don't let that fool you
• 9:43
  Speaker 3: into thinking it's simple. It's incredibly sophisticated.
• 9:46
  Speaker 2: So it's not code.
• 9:47
  Speaker 3: It's not code. We aren't simulating quantum mechanics using ones
• 9:52
  Speaker 3: and zeros on a normal chip. We are using actual
• 9:54
  Speaker 3: quantum objects to simulate other quantum objects.
• 9:58
  Speaker 2: So it's like using legos to SIMI light how bricks work,
• 10:01
  Speaker 2: rather than drawing bricks on a computer screen.
• 10:03
  Speaker 3: That's a perfect analogy. They are building a physical model
• 10:06
  Speaker 3: of the physics they want to study.
• 10:07
  Speaker 2: Okay, so what are the legos in this case? What
• 10:10
  Speaker 2: are the actual building blocks?
• 10:11
  Speaker 3: They used atoms of rubidium.
• 10:13
  Speaker 2: Rubidium element thirty seven on the periodic table.
• 10:16
  Speaker 3: That's the one, and they arrange these rubidium atoms into
• 10:19
  Speaker 3: a one dimensional chain. So I want you to imagine
• 10:22
  Speaker 3: a string of pearls. But the pearls are individual atoms
• 10:26
  Speaker 3: and they're floating in a vacuum.
• 10:27
  Speaker 2: Okay, string of atomic pearls. But how do you keep
• 10:30
  Speaker 2: an atom from just flying away? You can't exactly glue
• 10:34
  Speaker 2: it down. Atoms are wiggly little things.
• 10:36
  Speaker 3: You use light. That's the amazing part. They used highly
• 10:39
  Speaker 3: focused lasers they're often called optical tweezers to tightly control
• 10:43
  Speaker 3: the position of each individual atom.
• 10:45
  Speaker 2: Optical tweezers.
• 10:46
  Speaker 3: Yeah, so you have this row of atoms, each one
• 10:49
  Speaker 3: pinned in placed by its own beam of light.
• 10:51
  Speaker 2: That is just it always blows my mind that we
• 10:54
  Speaker 2: can actually do that here. Let me just hold this
• 10:56
  Speaker 2: single atom for you with a flashlight. It sounds like
• 10:59
  Speaker 2: something for Star Trek.
• 11:00
  Speaker 3: It really is remarkable technology. The source highlights this high
• 11:05
  Speaker 3: degree of quantum engineering. They are manipulating the fundamental building
• 11:09
  Speaker 3: blocks of matter with incredible, almost unbelievable precision.
• 11:14
  Speaker 2: But holding them in place is just step one, just
• 11:16
  Speaker 2: step one.
• 11:16
  Speaker 3: Step two is getting them to interact with each other.
• 11:19
  Speaker 2: Right, because a frozen line of atoms doesn't tell you
• 11:21
  Speaker 2: much about mixing if they aren't even allowed to talk
• 11:24
  Speaker 2: to each other exactly.
• 11:25
  Speaker 3: So, they used another laser to excite the atom's electrons.
• 11:29
  Speaker 2: Excite them How what does that mean? To excite an electron?
• 11:32
  Speaker 3: It means they use the laser's energy to push the
• 11:35
  Speaker 3: electron into a higher energy state, a different orbit around
• 11:39
  Speaker 3: the nucleus. When they do this, it causes the atom's
• 11:42
  Speaker 3: behaviors to become intertwined.
• 11:44
  Speaker 2: Oh okay.
• 11:45
  Speaker 3: In quantum terms, we're dealing with things like entanglement and interaction.
• 11:49
  Speaker 3: The atoms stop acting like solitary individuals and they start
• 11:52
  Speaker 3: acting like a collective system. Their fates are linked.
• 11:55
  Speaker 2: Okay, so we have a chain of rubidium atoms. They
• 11:58
  Speaker 2: are pinned in place by l They are excited at
• 12:01
  Speaker 2: interacting with each other. This is the choreography that the
• 12:04
  Speaker 2: source talks about.
• 12:05
  Speaker 3: Yes, the researchers set up this very specific initial state,
• 12:09
  Speaker 3: and this is like drawing the tulip in the latte
• 12:11
  Speaker 3: from They positioned everything perfectly, they set the energy levels
• 12:14
  Speaker 3: just so, and then then they let it go. They
• 12:17
  Speaker 3: let it go, They let the system run.
• 12:19
  Speaker 2: They introduced the squirrel exactly.
• 12:22
  Speaker 3: They allowed the engineered quantum evolution to happen. They released
• 12:26
  Speaker 3: the atoms from that initial rigid control just enough to
• 12:30
  Speaker 3: see what they would do. Would they thermalize? Would they mix?
• 12:33
  Speaker 2: Would the ink spread?
• 12:34
  Speaker 3: Yeah?
• 12:35
  Speaker 2: Would the tulip dissolve? That's the moment of truth.
• 12:38
  Speaker 3: That was the big question. And remember, in a normal system,
• 12:41
  Speaker 3: or even in many quantum systems, you would absolutely expect
• 12:44
  Speaker 3: interaction to lead to mixing. If I'm an excited atom,
• 12:47
  Speaker 3: and I bump into my neighbor. I transfer some energy.
• 12:50
  Speaker 3: That neighbor bumps into the next one. Eventually the energy
• 12:53
  Speaker 3: is spread all over the place.
• 12:54
  Speaker 2: Everything should average out.
• 12:55
  Speaker 3: It should, but that's not what happened. No, they observed
• 12:59
  Speaker 3: statistical localization.
• 13:01
  Speaker 2: So did the atoms mix like the coffee foam.
• 13:04
  Speaker 3: They did not. They stayed put, or rather their state
• 13:07
  Speaker 3: stayed put.
• 13:07
  Speaker 2: Almost all states are frozen. That's the quote from Wonky
• 13:10
  Speaker 2: and Low.
• 13:10
  Speaker 3: Almost all states are frozen. It's such a powerful and
• 13:14
  Speaker 3: surprising statement. It defies the expectation of chaos.
• 13:18
  Speaker 2: I want to dig into how this is different from
• 13:20
  Speaker 2: that normal localization you mentioned earlier, said that was like
• 13:22
  Speaker 2: potholes in the road. How is statistical localization different because
• 13:27
  Speaker 2: the source makes a pretty specific and important distinction here.
• 13:30
  Speaker 3: This is a nuanced but really crucial point that Low
• 13:33
  Speaker 3: makes in the paper. In the usual form of localization
• 13:36
  Speaker 3: that Anderson localization with the potholes, the properties of the
• 13:40
  Speaker 3: system are pinned to a particular site, like.
• 13:42
  Speaker 2: A specific location in space. So atom A belongs in
• 13:45
  Speaker 2: seat one, atomy is in C two, and they can't
• 13:48
  Speaker 2: move right.
• 13:49
  Speaker 3: Think of it like a traffic gym where every single
• 13:51
  Speaker 3: car is stuck exactly where it is. Nothing moves at all.
• 13:54
  Speaker 3: The disorder in the road, the potholes, prevents any movement.
• 13:57
  Speaker 3: You look at the GPS and that car is at
• 13:59
  Speaker 3: the same co ordinate for an hour.
• 14:01
  Speaker 2: Okay, total gridlock, every car for itself stuck in place.
• 14:05
  Speaker 3: But in statistical localization it's different. And this is the
• 14:08
  Speaker 3: mind bending part. The quote from the paper is here
• 14:12
  Speaker 3: we see localization, even though the conserved properties are rather
• 14:15
  Speaker 3: spread out.
• 14:16
  Speaker 2: Spread out, but localized. That sounds like a contradiction. How
• 14:21
  Speaker 2: can something be spread out and frozen at the same time.
• 14:24
  Speaker 3: It does sound like a paradox, it doesn't it. Let's
• 14:27
  Speaker 3: go back to the traffic jam analogy. In the old model,
• 14:30
  Speaker 3: every car is stuck on the highway completely alone. In
• 14:33
  Speaker 3: this new state, it's more like the cars might be
• 14:36
  Speaker 3: able to drive around a little bit, maybe they can
• 14:38
  Speaker 3: swap lanes with the cars right next to them, but
• 14:40
  Speaker 3: they can never leave their specific little group of cars.
• 14:43
  Speaker 3: The group itself is frozen in terms of its overall configuration,
• 14:47
  Speaker 3: even if there's some internal movement.
• 14:50
  Speaker 2: So it's not that every single atom is glued to
• 14:52
  Speaker 2: a specific coordinate. It's that the pattern. The relationship between
• 14:56
  Speaker 2: the atoms is.
• 14:57
  Speaker 3: What's frozen exactly. The overall state is preserved. The source
• 15:01
  Speaker 3: explains that this was actually theorized back in twenty twenty.
• 15:05
  Speaker 3: The Fear predicted that in certain quantum systems you would
• 15:08
  Speaker 3: find subsets of quantum states are connected to each other
• 15:11
  Speaker 3: and otherwise remain disjointed from all other quantum states.
• 15:15
  Speaker 2: Disjointed. That's a really key word here.
• 15:18
  Speaker 3: It is. Imagine a big cocktail party. Usually everyone mingles.
• 15:22
  Speaker 3: After an hour, you've probably talked to a bunch of
• 15:24
  Speaker 3: different people. The room has mixed. That's thermalization.
• 15:28
  Speaker 2: Okay, the room is buzzing, everyone is meeting new people,
• 15:31
  Speaker 2: sharing information exactly.
• 15:33
  Speaker 3: In this system, it's like the party immediately splits into
• 15:37
  Speaker 3: tiny separate clicks. The people in click A talk to
• 15:40
  Speaker 3: each other furiously. They're interacting, they're sharing energy, but only
• 15:44
  Speaker 3: with each other, and they absolutely completely ignore click B,
• 15:48
  Speaker 3: click C and.
• 15:48
  Speaker 2: Click b and clickbe ignores everyone else.
• 15:51
  Speaker 3: Too, everyone else. The room never mixes. The clicks remain disjointed.
• 15:55
  Speaker 3: They form these little isolated islands.
• 15:57
  Speaker 2: So the system is fragmented. It shatters into peace that
• 16:00
  Speaker 2: don't communicate.
• 16:01
  Speaker 3: Yes, the technical term is a fragmented state space. And
• 16:05
  Speaker 3: because these fragments don't talk to each other, the information
• 16:08
  Speaker 3: that's contained within them doesn't leak out, doesn't dissipate into
• 16:12
  Speaker 3: the rest of the system. It's protected.
• 16:14
  Speaker 2: So if we bring this all the way back to
• 16:16
  Speaker 2: the latte, if my latte had statistical localization, the milk
• 16:21
  Speaker 2: molecules might be dancing around with other milk molecules in
• 16:24
  Speaker 2: their own little cleek, right, but they refuse to acknowledge
• 16:27
  Speaker 2: the existence of the coffee molecules next to them.
• 16:30
  Speaker 3: Roughly speaking, yes, that's a great way to think about it.
• 16:33
  Speaker 3: The tulip pattern is made of milk. If the milk
• 16:35
  Speaker 3: molecules refuse to integrate with the coffee molecules, the tulip
• 16:38
  Speaker 3: pattern stays. Even if you swirl the cup. The swirling
• 16:42
  Speaker 3: moves the whole liquid around, but the internal separation remains.
• 16:47
  Speaker 3: The cleek's hold strong.
• 16:49
  Speaker 2: Low calls is very, very weird, and I have to
• 16:51
  Speaker 2: agree with her.
• 16:52
  Speaker 3: And she's right too, she says, in this imaginary example,
• 16:55
  Speaker 3: we would have expected the elements to mix together to
• 16:58
  Speaker 3: reach equilibrium, and yet we still some how see localization.
• 17:01
  Speaker 3: It's a genuine surprise.
• 17:03
  Speaker 2: It's weird, but she also says it could be a
• 17:05
  Speaker 2: powerful feature, And this brings us to the really important
• 17:09
  Speaker 2: part of this whole discussion, the so what why do
• 17:13
  Speaker 2: we care if Adam's form clicks? Why does it matter
• 17:17
  Speaker 2: if my hypothetical quantum latte doesn't mix well.
• 17:20
  Speaker 3: The first big application, and maybe the most immediate one,
• 17:23
  Speaker 3: is the holy grail of modern technology quantum computing.
• 17:27
  Speaker 2: Right. We hear about quantum computers all the time. They're
• 17:30
  Speaker 2: supposed to be faster, smarter, solve impossible problems, but they're
• 17:33
  Speaker 2: also incredibly fragile, aren't they? That's the catch.
• 17:37
  Speaker 3: Incredibly the biggest problem, the single biggest obstacle in building
• 17:40
  Speaker 3: a useful, large scale quantum computer is something called decohuans.
• 17:45
  Speaker 2: Which is basically the system just falling apart.
• 17:47
  Speaker 3: It's the coffee mixing, it's thermalization. Quantum states, the quibits
• 17:52
  Speaker 3: that do the computing are ridiculously delicate. Any little bit
• 17:55
  Speaker 3: of noise from the environment, a tiny change in temperature,
• 17:57
  Speaker 3: or a stray electromagnetic field, even the simple passage of
• 18:01
  Speaker 3: time causes the quantum information to degrade.
• 18:04
  Speaker 2: It leaks out, It leaks out.
• 18:06
  Speaker 3: It thermalizes, it turns into that beige uniform mess ah,
• 18:10
  Speaker 3: and when your information turns into a beige mess, you've
• 18:12
  Speaker 3: lost your data. Your calculation is completely ruined.
• 18:16
  Speaker 2: So if you want a quantum computer to actually work
• 18:18
  Speaker 2: for more than a fraction of a second, you need
• 18:20
  Speaker 2: a way to keep the ink blue and the water clear.
• 18:23
  Speaker 3: You need to preserve the state precisely. You need a
• 18:27
  Speaker 3: way to store information that is, and this is a
• 18:30
  Speaker 3: quote from the paper robust to unpredictable surroundings. You need
• 18:35
  Speaker 3: a memory system that fights back against entropy.
• 18:38
  Speaker 2: And statistical localization offers a path to that.
• 18:41
  Speaker 3: It offers a very exciting pathway. Low says, its implications
• 18:45
  Speaker 3: for robustly storing information in a quantum system are quite exciting.
• 18:50
  Speaker 3: Think about it. If you can encode your data, your
• 18:53
  Speaker 3: ones and zeros, into these frozen states, into these disjointed fragments.
• 18:57
  Speaker 2: Then they're naturally protected.
• 18:58
  Speaker 3: They're naturally protected. Environment can't mess them up as easily
• 19:01
  Speaker 3: because they refuse to mix, they refuse to listen to
• 19:04
  Speaker 3: the outside noise because.
• 19:05
  Speaker 2: They're in their own little clique YEA, ignoring everyone else.
• 19:08
  Speaker 3: They're in their click. The system naturally protects the information.
• 19:12
  Speaker 3: It's like having a hard drive that automatically rejects any
• 19:15
  Speaker 3: attempt to corrupt the files. It isolates the data in
• 19:19
  Speaker 3: these little protective quantum bubbles.
• 19:21
  Speaker 2: That's huge. I mean the source mentions that we're trying
• 19:24
  Speaker 2: to move from these small simulators with a anful equivots
• 19:28
  Speaker 2: to larger quantum computers that harness thousands of them.
• 19:33
  Speaker 3: Right, And as you scale up, the noise problem gets
• 19:36
  Speaker 3: exponentially worse. You have more atoms, more interactions, more chances
• 19:40
  Speaker 3: for things to go wrong. Finding a mechanism that inherently
• 19:43
  Speaker 3: resists the mixing without you having to constantly fight to
• 19:45
  Speaker 3: keep it separate with complicated error correction is a game changer.
• 19:49
  Speaker 2: It's like finding a material that's naturally fireproof instead of
• 19:52
  Speaker 2: having to constantly spray it with a fire hose.
• 19:54
  Speaker 3: That's a perfect analogy. It builds the protection right into
• 19:56
  Speaker 3: the fabric of the system.
• 19:58
  Speaker 2: So reason number one this matters better more stable quantum memory.
• 20:02
  Speaker 2: That alone would be enough to call this a major breakthrough.
• 20:05
  Speaker 2: But there's a second reason this matters, and it gets
• 20:07
  Speaker 2: a little more causal.
• 20:08
  Speaker 3: Yes, this is where it gets really fundamental. This connects
• 20:12
  Speaker 3: to the work of Natalie Culco, the assistant professor of
• 20:15
  Speaker 3: physics at Duke who was also on the study. It
• 20:18
  Speaker 3: turns out this experiment wasn't just about building a better
• 20:21
  Speaker 3: memory chip. It was also simulating a very specific and
• 20:24
  Speaker 3: very important kind of theory called lattice gauge theory.
• 20:28
  Speaker 2: Lattice gauge theory that sounds intense. I feel like I
• 20:33
  Speaker 2: need a degree just to say that sentence. What on
• 20:35
  Speaker 2: earth is that?
• 20:36
  Speaker 3: Kalco describes it as the language that we use to
• 20:39
  Speaker 3: describe three of the four fundamental forces in nature.
• 20:43
  Speaker 2: Okay, so just the building blocks of reality, No big deal, right,
• 20:46
  Speaker 2: just the instruction manual for.
• 20:48
  Speaker 3: The universe pretty much. We use these theories to understand
• 20:51
  Speaker 3: the strong nuclear force which holds atoms together, the weak
• 20:54
  Speaker 3: nuclear force, which governs radioactive decay and electromagnetism, everything from
• 20:59
  Speaker 3: the nuclei of atoms to the environments inside particle colliders
• 21:03
  Speaker 3: or weird astrophysical anomalies.
• 21:06
  Speaker 2: So typically, physicists use massive supercomputers to crunch the numbers
• 21:10
  Speaker 2: on these theories and make predictions.
• 21:11
  Speaker 3: They try to, but Calco points out a major major problem.
• 21:15
  Speaker 3: Calculating the elaborate predictions embedded in these theories is exceedingly costly,
• 21:20
  Speaker 3: if possible at all. On classical computers.
• 21:24
  Speaker 2: Why is that? Is the math just too hard? We
• 21:27
  Speaker 2: have some unbelievably powerful supercomputers these days.
• 21:30
  Speaker 3: It's not just that it's hard, it's that it is
• 21:33
  Speaker 3: exponentially complex. The number of variables you have to track
• 21:36
  Speaker 3: just explodes. Trying to simulate the interaction of sub atomic
• 21:40
  Speaker 3: particles on a classical binary computer one that uses just
• 21:44
  Speaker 3: ones and zeros is incredibly inefficient.
• 21:47
  Speaker 2: It's the wrong tool for the job.
• 21:48
  Speaker 3: It's like trying to simulate a hurricane using an abacus.
• 21:51
  Speaker 3: You run out of computing power almost immediately.
• 21:54
  Speaker 2: So enter the quantum simulator, right.
• 21:56
  Speaker 3: And this is the genius of it. Instead of trying
• 21:58
  Speaker 3: to calculate what the atoms would do using a formula,
• 22:01
  Speaker 3: they built a system out of atoms and watched what
• 22:04
  Speaker 3: they did do.
• 22:04
  Speaker 2: It's the ultimate modeling tool. It's analog. It's like using
• 22:08
  Speaker 2: a little wave pool to study how waves work, instead
• 22:10
  Speaker 2: of writing out a bunch of complex fluid dynamics equations.
• 22:14
  Speaker 3: Exactly and here is the beautiful connection. It turns out
• 22:18
  Speaker 3: that fragmented state spaces, those frozen disjointed cliques we've been
• 22:23
  Speaker 3: talking about, are a key feature of these gauge theories.
• 22:27
  Speaker 2: That's interesting so the weirdness of the frozen latte isn't
• 22:30
  Speaker 2: just a quirk of this one experiment. It's actually a
• 22:33
  Speaker 2: feature of the fundamental laws of physics.
• 22:35
  Speaker 3: That's the punchline. The experiment successfully mimiced the math of
• 22:39
  Speaker 3: the universe. The paper specifically says they used a U
• 22:43
  Speaker 3: one lattice gauge theory in a Rideberg simulator.
• 22:46
  Speaker 2: Okay, there's a lot of jargon in there. You one
• 22:48
  Speaker 2: lattice gauge theory.
• 22:49
  Speaker 3: I know it's a mouthful, but essentially it's a specific
• 22:52
  Speaker 3: mathematical framework that describes how fields like electric fields interact
• 22:56
  Speaker 3: with matter at a fundamental level. The truly significant thing
• 22:59
  Speaker 3: is that they proved this type of simulator can act
• 23:02
  Speaker 3: as a laboratory for sub atomic physics.
• 23:05
  Speaker 2: We can study things that are too complex for our
• 23:07
  Speaker 2: best supercomputers.
• 23:08
  Speaker 3: By creating them on a tabletop in a lab in
• 23:10
  Speaker 3: North Carolina.
• 23:11
  Speaker 2: Kilko calls it an encouraging step toward a highly anticipated
• 23:15
  Speaker 2: application of quantum computing for sub atomic physics.
• 23:18
  Speaker 3: It opens a door that was closed if we want
• 23:21
  Speaker 3: to understand how quarks bind together to form protons and neutrons,
• 23:25
  Speaker 3: or what happens inside the core of a neutron star.
• 23:28
  Speaker 3: We might not be able to calculate it on a
• 23:30
  Speaker 3: standard computer, but we might be able to build a
• 23:32
  Speaker 3: model of it using rubidium atoms and lasers, observe the
• 23:36
  Speaker 3: statistical localization and say, uh huh, that's how it works.
• 23:40
  Speaker 2: It's really bridging two completely different worlds. You've got the
• 23:44
  Speaker 2: engineers trying to build better computers for the future, and
• 23:47
  Speaker 2: you've got the theoretical physicists trying to understand the fabric
• 23:51
  Speaker 2: of reality itself, and this one experiment helps both of
• 23:54
  Speaker 2: them at the same time.
• 23:55
  Speaker 3: That's the beauty of it. The same phenomenon, this bizarre
• 23:58
  Speaker 3: refusal to mix solves the engineer's very practical memory problem
• 24:03
  Speaker 3: and validates the physicists very abstract theory.
• 24:06
  Speaker 2: I want to step back and just look at the
• 24:07
  Speaker 2: big picture here for a minute. We started with a
• 24:09
  Speaker 2: simple cup of coffee. We ended up with the fundamental
• 24:12
  Speaker 2: forces of the universe.
• 24:13
  Speaker 3: It's quite a trip, isn't it.
• 24:15
  Speaker 2: It really is the source material mentions that this research
• 24:19
  Speaker 2: could help probe questions about unusual material properties. What does
• 24:25
  Speaker 2: that look like in the real world? What are we
• 24:26
  Speaker 2: talking about here?
• 24:27
  Speaker 3: Well, we're entering an era of what people call novel
• 24:30
  Speaker 3: quantum materials. We are discovering and creating states of matter
• 24:36
  Speaker 3: that just don't exist in nature, things like high temperature superconductors, superfluids,
• 24:41
  Speaker 3: maybe even time crystals. Okay, statistical localization suggests there could
• 24:45
  Speaker 3: be materials that exist in a perpetual state of non equilibrium.
• 24:49
  Speaker 2: A material that never settles down, a material that stays
• 24:52
  Speaker 2: excited forever, or a material.
• 24:54
  Speaker 3: That conducts energy in very specific, choreographed ways rather than
• 24:58
  Speaker 3: just letting it spread out randomly. As he imagine a
• 25:01
  Speaker 3: wire that doesn't heat up when you pass electricity through
• 25:04
  Speaker 3: it because the electrons refuse to thermalize with the metal lattice.
• 25:07
  Speaker 2: That would change electronics forever. No more overheating phones, no
• 25:10
  Speaker 2: more fans in our laptops.
• 25:12
  Speaker 3: Potentially, it's speculative at this point of course, but that's
• 25:15
  Speaker 3: where this kind of basic research leads. It changes the
• 25:17
  Speaker 3: rule book of what materials are even capable of doing.
• 25:20
  Speaker 2: And it all comes back to that initial surprise, the weirdness.
• 25:25
  Speaker 3: Low said it best in that quote, that is very,
• 25:28
  Speaker 3: very weird, but it could be a powerful feature.
• 25:31
  Speaker 2: I love that attitude. In science, weird usually means we
• 25:34
  Speaker 2: found something important. It's not a bug it's a feature.
• 25:38
  Speaker 3: Weird is where the discovery is. If the experiment had
• 25:41
  Speaker 3: done exactly what they expected, if the atoms had just
• 25:44
  Speaker 3: mixed and thermalized like a cup of coffee, it would
• 25:47
  Speaker 3: have been a boring day at the lab. Right yep,
• 25:50
  Speaker 3: Entropy still works. The second law of thermodynamics is safe.
• 25:54
  Speaker 3: Let's go get lunch.
• 25:55
  Speaker 2: Physics still works as advertised. Everyone can go home now exactly.
• 25:59
  Speaker 3: But because it didn't mix, because the tulip stayed in
• 26:02
  Speaker 3: the foam, they have a new tool, a new principle
• 26:04
  Speaker 3: to work with.
• 26:05
  Speaker 2: It's fascinating to think about the scale of it all too.
• 26:07
  Speaker 2: The article talks about this, spanning from nuclei all the
• 26:11
  Speaker 2: way to astrophysical environments.
• 26:13
  Speaker 3: It shows the universality of physics, which is just a
• 26:16
  Speaker 3: beautiful concept. The same fundamental rules that govern a tiny
• 26:20
  Speaker 3: chain of rubedium atoms and a vacuum chamber also govern
• 26:23
  Speaker 3: the massive forces inside stars, and by studying one we
• 26:26
  Speaker 3: learn about the other.
• 26:28
  Speaker 2: So let's recap for everyone who might still be picturing
• 26:30
  Speaker 2: that coffee cup. What is the headline news here? What's
• 26:33
  Speaker 2: the big takeaway?
• 26:34
  Speaker 3: The headline is researchers at Duke University used a neutral
• 26:38
  Speaker 3: atom quantum simulator to observe a phenomenon called statistical localization.
• 26:43
  Speaker 3: This is a state where atoms, despite being able to interact,
• 26:46
  Speaker 3: refuse to mix or reach thermal equilibrium. They stay frozen
• 26:50
  Speaker 3: in their initial patterns.
• 26:52
  Speaker 2: And this is important for two main reasons.
• 26:54
  Speaker 1: Right.
• 26:54
  Speaker 3: Two main reasons. One it suggests a way to build
• 26:57
  Speaker 3: robust quantum memory that doesn't degrade over time, which is
• 27:00
  Speaker 3: a huge step for quantum computing. And two, it provides
• 27:04
  Speaker 3: a powerful new way to simulate and study the fundamental
• 27:07
  Speaker 3: forces of nature, specifically lattice gauge theories, which are too
• 27:10
  Speaker 3: hard for normal computers to handle.
• 27:12
  Speaker 2: It's a win win, a practical win, and a theoretical win.
• 27:16
  Speaker 3: It's a massive win, and it validates a theory from
• 27:18
  Speaker 3: just a few years ago, proving that these fragmented states
• 27:22
  Speaker 3: are real things you can build and observe.
• 27:24
  Speaker 2: It really challenges our perception of time and chaos, doesn't it.
• 27:27
  Speaker 2: I mean, we are so used to the idea that
• 27:29
  Speaker 2: things fall apart, that order degrades into disorder.
• 27:32
  Speaker 3: That's the second law of thermodynamics. Entropy always increases. Things
• 27:37
  Speaker 3: fall apart. The center cannot hold. It's one of the
• 27:39
  Speaker 3: most fundamental laws we have.
• 27:41
  Speaker 2: But here, in this little pocket of the quantum universe,
• 27:44
  Speaker 2: entropy is. It's held at bay, It's paused.
• 27:48
  Speaker 3: The system finds a way to preserve its structure, to
• 27:52
  Speaker 3: preserve its information against all odds.
• 27:55
  Speaker 2: It's like finding a sand castle that the tide can't
• 27:57
  Speaker 2: wash away.
• 27:58
  Speaker 3: That is a beautiful way to put it, a perfect analogy.
• 28:00
  Speaker 2: Before we wrap up, I just want to touch on
• 28:02
  Speaker 2: the technology one more time, the lasers and lenses. The
• 28:05
  Speaker 2: article has a picture. Obviously you can't see it if
• 28:07
  Speaker 2: you're listening, but it mentions a close up look at
• 28:10
  Speaker 2: tabletop quantum simulator setups and that phrase high degree of
• 28:15
  Speaker 2: quantum engineering.
• 28:16
  Speaker 3: We really shouldn't closs over that. This isn't just theory
• 28:18
  Speaker 3: on a talkboard. The ability to control individual atoms, to
• 28:22
  Speaker 3: grab them with light, place them precisely where you want them,
• 28:25
  Speaker 3: and then poke them with another laser to excite them
• 28:28
  Speaker 3: with this level of precision is a monumental triumph of engineering.
• 28:31
  Speaker 2: It really is. We are manipulating the literal building blocks
• 28:36
  Speaker 2: of matter like they are legos. We were playing God
• 28:40
  Speaker 2: with atoms in a very real, tangible.
• 28:43
  Speaker 3: Way, and we're doing it to test theories that describe
• 28:45
  Speaker 3: the birth of the universe. There's something almost poetic about that.
• 28:48
  Speaker 2: So what's next for this team? The article mentions the
• 28:51
  Speaker 2: evolution from small simulators to larger computers. Is that the
• 28:55
  Speaker 2: next logical step?
• 28:56
  Speaker 3: That's the path. They've proven the principle with this one
• 28:59
  Speaker 3: dimension chain of atoms. Now can they scale it? Can
• 29:02
  Speaker 3: they build a two dimensional grid? Can they use this
• 29:04
  Speaker 3: freezing technique to build a reliable memory bank for a
• 29:08
  Speaker 3: one thousand kubit computer?
• 29:10
  Speaker 2: And if they can, what is that unlocked?
• 29:12
  Speaker 3: If they can, we are one giant step closer to practical,
• 29:16
  Speaker 3: fault tolerant quantum computing, which means better drug discovery, new
• 29:19
  Speaker 3: material science, more accurate climate modeling, all the things we've been.
• 29:23
  Speaker 2: Promised, all starting from a frozen latte.
• 29:25
  Speaker 3: All starting from a frozen latte.
• 29:27
  Speaker 2: I want to leave everyone with something to think about.
• 29:30
  Speaker 2: We spend our entire lives operating under the assumption that
• 29:33
  Speaker 2: time moves forward and things mix. You spill the milk,
• 29:37
  Speaker 2: it spreads, you break the glass, it shatters into a
• 29:40
  Speaker 2: million pieces. But this research shows that at the very
• 29:44
  Speaker 2: very bottom of reality, there are exceptions. There are pockets
• 29:48
  Speaker 2: of existence that refuse to mix.
• 29:50
  Speaker 3: It makes you wonder what else is down there?
• 29:52
  Speaker 2: It really does. If nature has a built in mechanism
• 29:55
  Speaker 2: to preserve information perfectly, to keep that tulip crisp against
• 29:59
  Speaker 2: the relat let's flow of chaos. What else might be
• 30:02
  Speaker 2: frozen in the quantum fabric that we haven't found yet?
• 30:06
  Speaker 2: Is there information stored in the universe using this exact
• 30:09
  Speaker 2: mechanism that has been there since the beginning of time,
• 30:12
  Speaker 2: just waiting for us to learn how to read it.
• 30:14
  Speaker 3: That is a profound question, a really profound question.
• 30:17
  Speaker 2: Something to mull over with your next cup of coffee. Yeah,
• 30:20
  Speaker 2: just you know, don't stare at the bone for too long.
• 30:22
  Speaker 2: People might think you're up to something. Indeed, thanks for
• 30:25
  Speaker 2: joining us on this exploration of the quantum weirdness coming
• 30:28
  Speaker 2: out of Duke. It's been a blast.
• 30:29
  Speaker 3: It's always a pleasure to freeze time with you.
• 30:31
  Speaker 2: See you next time.