Questions tagged [time-crystals]

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Why cant time-crystals form in thermal equilibrium?

This would make time-crystals a practically useless source of work, correct?
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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 ...
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2answers
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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 ...
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0answers
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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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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 ...
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1answer
172 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 ...
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0answers
55 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 ...
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2answers
2k 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 ...
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0answers
169 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 ...
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1answer
3k views

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-...
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1answer
872 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 ...