1. Synthetic parity-time symmetry breaking in a single microcavity
- Author
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Zhang, Fangxing, Feng, Yaming, Ge, Li, and Wan, Wenjie
- Subjects
Physics - Optics - Abstract
Non-Hermitian systems based on parity-time (PT) symmetry reveal rich physics beyond the Hermitian regime. So far, realizations of PT-symmetric systems have been limited to the spatial domain. Here we theoretically and experimentally demonstrate PT symmetry in a synthetic spectral dimension induced by nonlinear Brillouin scattering in a single optical microcavity, where electromagnetically 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., Comment: 11 pages, 3 figures
- Published
- 2019
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