Time Crystals: A New state of Matter

Sorry it’s been quiet here for a while. Exam season slows us down a little.

Original article via Science Alert

It’s official: time crystals are a new state of matter, and now we can create them – ScienceAlert:

Earlier this year, physicists had put together a blueprint for how to make and measure time crystals – a bizarre state of matter with an atomic structure that repeats not just in space, but in time, allowing them to maintain constant oscillation without energy.

Two separate research teams managed to create what looked an awful lot like time crystals back in January, and now both experiments have successfully passed peer-review for the first time, putting the ‘impossible’ phenomenon squarely in the realm of reality. More… 

Image: Pete LinForth/Pixabay

Time Crystals

Original article on Phys.org

Normal crystals, likes diamond, are an atomic lattice that repeats in space, but physicists recently suggested making materials that repeat in time. Last year, UC Berkeley’s Norman Yao sketched out the phases surrounding a time crystal and what to measure in order to confirm that this new material is actually a stable phase of matter. This stimulated two teams to build a time crystal, the first examples of a non-equilibrium form of matter.

To most people, crystals mean diamond bling, semiprecious gems or perhaps the jagged amethyst or beloved by collectors.

To Norman Yao, these inert crystals are the tip of the iceberg.

If crystals have an atomic structure that repeats in space, like the carbon lattice of a diamond, why can’t crystals also have a structure that repeats in time? That is, a time crystal?

In a paper published online last week in the journal Physical Review Letters, the University of California, Berkeley assistant professor of physics describes exactly how to make and measure the properties of such a crystal, and even predicts what the various phases surrounding the time crystal should be—akin to the liquid and gas phases of ice.
Read more at: https://phys.org/news/2017-01-physicists-unveil-mattertime-crystals.html#jCp

 

Thermodynamics constrains interpretations of quantum mechanics

Pilot Wave Theory

The latest PBS Digital video discusses quantum realism via the Pilot Wave Theory. A theory yet to be given the credibility of the Copenhagen interpretation because it doesn’t allow for relativity.

We’ve been discussing here recently how relativity can possibly be independent of time if time itself is quantum. I’ve spoken about this before in relation to dark energy and will probably write an update soon.