Questions tagged [time-crystals]

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1answer
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Understanding time crystals

In very recent publications, two groups in Maryland (paper: "Observation of a Discrete Time Crystal") and Harvard (paper: "Observation of discrete time-crystalline order in a disordered dipolar many-...
15
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2answers
3k views

What could time crystals be useful for?

Time crystals have been theorized only a few years ago and confirmed recently. The articles reporting it don't talk about what they could be used for. Of course, every branch of physics can help us ...
11
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1answer
920 views

Time crystals: fake or revolution?

This article about time crystals just appeared on the PRL website. Viewpoint: Crystals of Time (http://physics.aps.org/articles/v5/116) The authors (including famous Frank Wilczek) claim that some ...
5
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1answer
235 views

What's the difference between a time crystal and a system undergoing periodic motion?

What's the difference between a time crystal and a system undergoing periodic motion? My understanding of a crystal is that it is a rigid body with a spatially periodic structure. Is any system ...
3
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2answers
155 views

Do time crystals require quantum entanglement?

In this video (at this time in the video) the vlogger seems to make a statement that the only way time crystals can be achieved is if some of the atoms (at a periodic distance from each other) are ...
3
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0answers
70 views

What is internal space translation?

While I was reading the paper named "Classical time crystals," by A. Shapere and F. Wilczek, I found the following transformation. $$f(x) \to f(x+e) - \frac{df}{dx}*e$$ It says the transformation is ...
3
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0answers
57 views

Can time crystals scatter incoming waves toward the past?

Can time crystals scatter incoming waves toward the past? I think it is a fair question to ask, albeit the answer is overwhelmingly likely NO. But since the concept is fairly new, I'm wondering if ...
2
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1answer
42 views

Why cant time-crystals form in thermal equilibrium?

This would make time-crystals a practically useless source of work, correct?
2
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0answers
39 views

Time Crystals: Rigidity, tuning of Hamiltonians

From my basic understanding of Time Crystals, we need a periodically driven Hamiltonian, say $H(t)$ with period $T$, $H(t)= H(T+t)$ and a local order parameter $O(t)$ with a period $nT$ satisfying ...
1
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2answers
88 views

Could spacetime have crystalline properties?

Space-time is currently modeled as a continuous manifold. However, space-time shares many features in general relativity that mimic a fluid-like thing. Fluids are certain states of matter and under ...
1
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0answers
21 views

What are the differences and similarities between Quantum synchronization and time-crystalisation?

I am learning about Quantum synchronization and read [1,2] on Sunday, which are about many-body bosonic systems. I understand that what happens when the system synchronizes is that all the particles ...
1
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0answers
44 views

What are Time Crytals? [duplicate]

I am a physics enthusiast and came upon an article regarding time crystals and didn't understand many things. What exactly are Time Crystals? and what sets them apart from Normal crystals?
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0answers
186 views

How do time crystals not contradict thermodynamics?

Given that one of the basic properties of time crystals is that they move without any energy being applied, does that not mean that it's producing more energy than it's receiving? How does that not ...
0
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1answer
21 views

Trying to understand crystal structures within a solid

I am trying to get a firm understanding of crystal structures in solid state physics but having some issues with the terminology. If I understand correctly, the lattice are points in a 3-D space so ...