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Time Crystal News

A space-time crystal or four-dimensional crystal is a theoretical structure periodic in time and space. It extends the idea of a crystal to four dimensions. The idea was proposed by Frank Wilczek in 2012. His speculation was that a construct would have a group of particles that move and periodically return to their original state, perhaps moving in a circle, and form a time crystal. In order for this perpetual motion to work, the system must not radiate its rotational energy. This type of motion is distinct from that of persistent currents in a superconductor, wherein the rotating Cooper pairs are not time crystals because their wave functions are homogenous, meaning time translational symmetry isn t broken. Symmetry would be spontaneously broken in Wilczek s ring system if its ground state still involves continuous movement. Tongcang Li and others proposed a system with beryllium ions circulating in a magnetic ion trap at about 10−9 K. Wilczek also suggested that a computing device ....

Frank Wilczek , Patrick Bruno , Tongcang Li , All Articles ,

Researchers Use Gold Film To Enhance Quantum Sensing With Qubits In A 2D Material

Researchers Use Gold Film To Enhance Quantum Sensing With Qubits In A 2D Material
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Tongcang Li , Purdue University , Engineering Institute , Office Of Science , Quantum Science Center , National Science Foundation , National Quantum Information Science Research Centers , Us Department Of Energy , Nature Physics , Nano Letters , Purdue Quantum Science , Light Matter Interactions , Quantum Science ,