The first movie of a space-time crystal has been successfully recorded by a German-Polish team of researchers, shedding light on some of the potential uses of these intriguing structures.
By definition, a crystal is a substance that is a highly organized microscopic structure whose components are arranged in a lattice. The order in a time crystal is the same, but observed in time rather than space. The structure oscillates and changes, periodically returning to a certain state.
The result of combining the two is a space-time crystal. The crystal used in the study was made using a permalloy strip, an iron-nickel alloy, and mounted on a small antenna through which they passed radio frequency current. Study in 2021 Physical Review Letters was published in the magazine.
Electrons in this substance have undergone unique excitation states as a result of this activity. They are known as semi-particle magnons because they behave like particles even though they are not. Magnons in this matter, a classical space-time crystal, can be observed as they periodically enter and exit their arrangement in both space and time.
"We've succeeded in showing that such space-time crystals are much more robust and common than first thought," said Pawel Gruszecki, a researcher at the Faculty of Physics at Adam Mickiewicz University in Pozna and also one of the study's lead authors.
“Unlike an isolated medium, our crystal condenses at room temperature and allows particle interaction. It has also reached a size that can be used with the magnonic space-time crystal. According to Gruszecki, there are many potential uses.
The repetitive material structure was at room temperature and in micrometer size. The discovery that space-time crystals could interact with additional magnons that the researchers dumped into the system was incredibly exciting. Two time crystals were created to interact in 2020, but this study marks the first time we've studied how quasiparticles interact with a spacetime crystal.
“We sent more magnons into the regular pattern of magnons in space and time, and they dispersed as a result. As we have shown, the time crystal can interact with other quasiparticles. Co-author Nick Träger, a PhD candidate at the Max Planck Institute for Intelligent Systems, said no one has yet been able to directly demonstrate this, let alone in an experiment, let alone in a movie.
There is great curiosity about how time crystal structures can be used for communication or imaging technologies because crystals are useful in a wide variety of technologies.
Günceleme: 25/03/2023 21:13