期刊
PHYSICAL REVIEW LETTERS
卷 124, 期 5, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.124.053901
关键词
-
资金
- National Key Research and Development Program [2016YFA0302500, 2017YFA0303700]
- National Science Foundation of China [11674228, 11304201, 61475100]
- Shanghai MEC Scientific Innovation Program [E00075]
- NSF [PHY-1847240]
Non-Hermitian systems based on parity-time (PT) and anti-PT symmetry reveal rich physics beyond the Hermitian regime. So far, realizations of such symmetric systems have been limited to the spatial domain. Here we theoretically and experimentally demonstrate synthetic anti-PT symmetry in a spectral dimension induced by nonlinear Brillouin scattering in a single optical microcavity, where Brillouin scattering induced transparency or absorption in two spectral resonances provides the optical gain and loss to observe a phase transition between two symmetry regimes. This scheme provides a new paradigm towards the investigation of non-Hermitian physics in a synthetic photonic dimension for all-optical signal processing and quantum information science.
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