Journal
SCIENCE
Volume 364, Issue 6443, Pages 878-+Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.aaw8205
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Funding
- National Key R&D Program of China [2018YFA0306600, 2016YFB0501603]
- NNSFC [11761131011]
- Chinese Academy of Sciences [GJJSTD20170001, QYZDY-SSW-SLH004, QYZDB-SSW-SLH005]
- Anhui Initiative in Quantum Information Technologies [AHY050000]
- Youth Innovation Promotion Association of Chinese Academy of Sciences
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Steering the evolution of single spin systems is crucial for quantum computing and quantum sensing. The dynamics of quantum systems has been theoretically investigated with parity-time-symmetric Hamiltonians exhibiting exotic properties. Although parity-time symmetry has been explored in classical systems, its observation in a single quantum system remains elusive. We developed amethod to dilate a general parity-time-symmetric Hamiltonian into a Hermitian one. The quantum state evolutions ranging from regions of unbroken to broken PT symmetry have been observed with a single nitrogen-vacancy center in diamond. Owing to the universality of the dilation method, our result provides a route for further exploiting and understanding the exotic properties of parity-time symmetric Hamiltonian in quantum systems.
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