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New Discovery Helps Close the Gap Towards Optically-Controlled Quantum Computation

By IQT News posted 21 Apr 2020

(Phys.org) Scientists at Ames Laboratory, Brookhaven National Laboratory, and the University of Alabama Birmingham have discovered a light-induced switching mechanism in a Dirac semimetal. The mechanism establishes a new way to control the topological material, driven by back-and-forth motion of atoms and electrons, which will enable topological transistor and quantum computation using light waves.
Wide-scale adoption of new computational principles, such as quantum computing, requires building devices in which fragile quantum states are protected from their noisy environments. One approach is through the development of topological quantum computation, in which qubits are based on “symmetry-protected” quasiparticles that are immune to noise.
“Our work opens a new arena of light wave topological electronics and phase transitions controlled by quantum coherence,” says Qiang Li, Group leader of the Brookhaven National Laboratory’s Advanced Energy Materials Group. “This will be useful in the development of future quantum computing strategies and electronics with high speed and low energy consumption.”

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