advertisement
Science News
from research organizations

Time crystals 'impossible' but obey quantum physics

Date:
June 2, 2022
Source:
Lancaster University
Summary:
Scientists have created a 'time-crystal' a two-body system in an experiment that seems to bend the laws of physics. A 'two-level system' is a basic building block of a quantum computer. Time crystals could perhaps be used to build quantum devices that work at room temperature. Time crystals were long believed to be impossible because they are made from atoms in never-ending motion. The discovery shows that not only can time crystals be created, but they have potential to be turned into useful devices.
Share:
advertisement

FULL STORY

Scientists have created the first "time-crystal" two-body system in an experiment that seems to bend the laws of physics.

It comes after the same team recently witnessed the first interaction of the new phase of matter.

Time crystals were long believed to be impossible because they are made from atoms in never-ending motion. The discovery, published inNature Communications,shows that not only can time crystals be created, but they have potential to be turned into useful devices.

Time crystals are different from a standard crystal -- like metals or rocks -- which is composed of atoms arranged in a regularly repeating pattern in space.

First theorised in 2012 by Nobel Laureate Frank Wilczek and identified in 2016, time crystals exhibit the bizarre property of being in constant, repeating motion in time despite no external input. Their atoms are constantly oscillating, spinning, or moving first in one direction, and then the other.

EPSRC Fellow Dr Samuli Autti, lead author from Lancaster University's Department of Physics, explained: "Everybody knows that perpetual motion machines are impossible. However, in quantum physics perpetual motion is okay as long as we keep our eyes closed. By sneaking through this crack we can make time crystals."

"It turns out putting two of them together works beautifully, even if time crystals should not exist in the first place. And we already know they also exist at room temperature."

A "two-level system" is a basic building block of a quantum computer. Time crystals could be used to build quantum devices that work at room temperature.

An international team of researchers from Lancaster University, Royal Holloway London, Landau Institute, and Aalto University in Helsinki observed time crystals by using Helium-3 which is a rare isotope of helium with one missing neutron. The experiment was carried out in Aalto University.

They cooled superfluid helium-3 to about one ten thousandth of a degree from absolute zero (0.0001K or -273.15°C). The researchers created two time crystals inside the superfluid, and brought them to touch. The scientists then watched the two time crystals interacting as described by quantum physics.

advertisement

Story Source:

Materialsprovided byLancaster University.注意:内容可能被编辑风格d length.


Journal Reference:

  1. S. Autti, P. J. Heikkinen, J. Nissinen, J. T. Mäkinen, G. E. Volovik, V. V. Zavyalov, V. B. Eltsov.Nonlinear two-level dynamics of quantum time crystals.Nature Communications, 2022; 13 (1) DOI:10.1038/s41467-022-30783-w

Cite This Page:

Lancaster University. "Time crystals 'impossible' but obey quantum physics." ScienceDaily. ScienceDaily, 2 June 2022. .
Lancaster University. (2022, June 2). Time crystals 'impossible' but obey quantum physics.ScienceDaily. Retrieved July 25, 2023 from www.koonmotors.com/releases/2022/06/220602095115.htm
Lancaster University. "Time crystals 'impossible' but obey quantum physics." ScienceDaily. www.koonmotors.com/releases/2022/06/220602095115.htm (accessed July 25, 2023).

Explore More
from ScienceDaily

RELATED STORIES