Observation of parity-time symmetry breaking in a single-spin system

Wu, Yang; Liu, Wenquan; Geng, Jianpei; Song, Xingrui; Ye, Xiangyu; Duan, Chang-Kui; Rong, Xing; Du, Jiangfeng

doi:10.1126/science.aaw8205

Observation of parity-time symmetry breaking in a single-spin system

May 31, 2019

3 pages

Published in:

Science 364 (2019) 6443, 878-880

Published: May 31, 2019

DOI:

10.1126/science.aaw8205

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Abstract: (submitter)

Breaking symmetry with single spins The energetics of quantum systems are typically described by Hermitian Hamiltonians. The exploration of non-Hermitian physics in classical parity-time (PT)–symmetric systems has provided fertile theoretical and experimental ground to develop systems exhibiting exotic behavior. Wu et al. now demonstrate that non-Hermitian physics can be found in a solid-state quantum system. They developed a protocol, termed dilation, which transformed a PT-symmetric Hamiltonian into a Hermitian one. This allowed them to investigate PT-symmetric physics with a single nitrogen-vacancy center in diamond. The results provide a starting point for exploiting and understanding the exotic properties of PT-symmetric Hamiltonians in quantum systems. Science , this issue p. 878

Hamiltonian
symmetry breaking
diamond
spin
dilation

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