A Major Step Toward Stable Quantum Data Storage

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