Eternal Change for No Energy: A Time Crystal Finally Made Real:
In a preprint posted online Thursday night, researchers at Google in collaboration with physicists at Stanford, Princeton and other universities say that they have used Google's quantum computer to demonstrate a genuine "time crystal." In addition, a separate research group claimed earlier this month to have created a time crystal in a diamond.
A novel phase of matter that physicists have strived to realize for many years, a time crystal is an object whose parts move in a regular, repeating cycle, sustaining this constant change without burning any energy.
"The consequence is amazing: You evade the second law of thermodynamics," said Roderich Moessner, director of the Max Planck Institute for the Physics of Complex Systems in Dresden, Germany, and a co-author on the Google paper. That's the law that says disorder always increases.
Time crystals are also the first objects to spontaneously break "time-translation symmetry," the usual rule that a stable object will remain the same throughout time. A time crystal is both stable and ever-changing, with special moments that come at periodic intervals in time.
[...] "This is just this completely new and exciting space that we're working in now," said Vedika Khemani, a condensed matter physicist now at Stanford who co-discovered the novel phase while she was a graduate student and co-authored the new paper with the Google team.
Journal Reference:
Mi, Xiao, Ippoliti, Matteo, Quintana, Chris, et al. Observation of Time-Crystalline Eigenstate Order on a Quantum Processor, (DOI: https://arxiv.org/abs/2107.13571)
(Score: 2) by Tork on Monday August 30 2021, @10:25PM (10 children)
Like putting too much air into a balloon. Make it so.
🏳️🌈 Proud Ally 🏳️🌈
(Score: 3, Insightful) by fustakrakich on Monday August 30 2021, @10:29PM (4 children)
quantum simulation platform
La politica e i criminali sono la stessa cosa..
(Score: 3, Funny) by Tork on Monday August 30 2021, @10:34PM (2 children)
🏳️🌈 Proud Ally 🏳️🌈
(Score: 0) by Anonymous Coward on Monday August 30 2021, @11:06PM (1 child)
Like a balloon, when something bad happens!
(Score: 3, Touché) by Tork on Monday August 30 2021, @11:21PM
🏳️🌈 Proud Ally 🏳️🌈
(Score: 1, Insightful) by Anonymous Coward on Monday August 30 2021, @11:35PM
Reminds me of my early exposure to a SPICE electronic circuit analyzer...
I designed an absolutely perfect voltage reference.
I built it. It worked almost as good as the simple standard op amp stabilized zener circuit, was far more complicated, used five times more parts, required precision low tempco resistors.
In other words, wild goose chase.
Moral and lesson learned...math is exact, but my models are not.
(Score: 3, Touché) by krishnoid on Monday August 30 2021, @10:34PM
I'm sure everyone knows the Futurama reference, but just in case [youtu.be].
(Score: 4, Interesting) by darkfeline on Tuesday August 31 2021, @02:40AM (2 children)
Sounds like relativity bullshit. You can change an object without changing an object by changing the point of reference. Maybe time crystals are simply objects that don't have the same "inertia" as the frames of reference we're used to.
Join the SDF Public Access UNIX System today!
(Score: 3, Interesting) by hendrikboom on Tuesday August 31 2021, @03:23AM
Not relativity. It's quantum-mechanical bullshit. And it looks as if it's just ordinary nonweirdness -- QM just behaving as it ought to until something decoheres.
When it decoheres, that's when entropy and the second law get their due.
(Score: 3, Informative) by edIII on Tuesday August 31 2021, @07:41PM
I think this whole quantum simulation is fucking people up here.
A time crystal is like an ordinary crystal. Ordinary crystals have repeating patterns in space, so you might call them space-crystals. A "time-crystal" is just like it sounds, it has repeating patterns in time. It's not that time crystals break symmetry, they just have a different symmetry.
Yes, these actually exist outside of simulations - Video recording of a time crystal [is.mpg.de]
This PBS Video [youtube.com] does a good job of explaining them.
Technically, lunchtime is at any moment. It's just a wave function.
(Score: 0) by Anonymous Coward on Tuesday August 31 2021, @05:18AM
Extraordinary claims demand extraordinary evidence. It's no good if it's true.
You need to be able to bring your understanding and knowledge to the wider society.
Let's put it this way. If technology at whatever level X requires a certain intelligence level and a certain amount of actual energy/effort to build the understanding of that technology into your brain, there's a certain percentage of the population who we will not educate to that technology.
As the required intelligence and effort rises, so too do the opportunity costs. We have other stuff to do!
Problem is, the error rate goes up. We're checking the results far fewer times. There will be more errors, and progress will slow, simply because catching the errors is one core way we evolve our model: science.
That's why you need to ELI-5. To make science work the way it's supposed to. When you claim to break something we spent generations educating the population on, you need to expend similar effort to help us understand the new information.
(Score: 4, Funny) by Anonymous Coward on Tuesday August 31 2021, @12:49AM (1 child)
Only temporarily... until Google cancels this project.
(Score: 1, Funny) by Anonymous Coward on Tuesday August 31 2021, @03:04AM
Not to worry, they've got all the documentation on their Google+ page.
(Score: 5, Touché) by Rosco P. Coltrane on Tuesday August 31 2021, @01:04AM (7 children)
No you don't.
And this time I'll proudly admit I didn't read TFA, because I stopped right there: either the guy is serious and he's a crackpot, or it's a trick to get me to read the rest of the article to find out how this outrageous claim can be true, and I don't appreciate sensationalist science writeups designed to sucker me into reading it.
(Score: 4, Interesting) by hendrikboom on Tuesday August 31 2021, @03:27AM (1 child)
Move along, nothing to see here. It's just a quantum-mechanical state that stays as it is until it decoheres. Is it oscillating? Of course. Just about any quantum-mechanical state oscillates. It used to be called wave mechanics, remember?
(Score: 0) by Anonymous Coward on Tuesday August 31 2021, @05:54AM
(Score: 2, Touché) by Anonymous Coward on Tuesday August 31 2021, @03:36AM (4 children)
Yeah, but by rigorously playing with the statistical definitions within the laws of thermodynamics you can end up with negative temperatures. That behave as if they're hotter than infinite temperatures. That's not the regime under which the laws of thermodynamics are designed to work.
The laws of probability don't model the shell game or the stock market either.
(Score: 0) by Anonymous Coward on Tuesday August 31 2021, @03:08PM (2 children)
Yeah, not so sure about that second one [wikipedia.org].
(Score: 2) by FatPhil on Tuesday August 31 2021, @04:15PM (1 child)
Got any evidence that E[eps_t.eps_{t+d}] = 0 for small d?
Great minds discuss ideas; average minds discuss events; small minds discuss people; the smallest discuss themselves
(Score: 0) by Anonymous Coward on Tuesday August 31 2021, @04:39PM
The answer, as usual, is it depends [sciencedirect.com]:
(Score: 2) by hendrikboom on Monday September 27 2021, @04:32PM
Last time I heard, those negative temperatures [wikipedia.org] have actually been observed. It turns out that the temperature scale connects the negative temperatures with the positive ones across infinity, not across zero. Which suggests to me that we should be talking about the reciprocal of temperature rather than about the temperature.
(Score: 2) by looorg on Tuesday August 31 2021, @02:22AM
Just what I always wanted a Google Time Crystal Perpetual Motion Machine (GTCPMM!, another acronym that just rolls of the tongue ...)
(Score: 0) by Anonymous Coward on Tuesday August 31 2021, @09:15PM
It doesn't sound any different to me than having two bodies orbiting each other, in just the right way, that they perpetually orbit each other without any decay; except the quantum version of this. I would imagine you couldn't extract any useful energy out of this system without it decaying...
Kind of neat though, I suppose; It would seem then... One of the applications for this could be quantum computing; which, is, probably why Google's name is in the article. Perhaps, this is the path to room temperature quantum computing...
That'd be neat, I suppose..