Synthetic Anti-PT Symmetry in a Single Microcavity

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...

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Bibliographic Details
Published in:Physical review letters Vol. 124; no. 5; p. 053901
Main Authors: Zhang, Fangxing, Feng, Yaming, Chen, Xianfeng, Ge, Li, Wan, Wenjie
Format: Journal Article
Language:English
Published: United States American Physical Society 07.02.2020
Subjects:
Optical communication
Phase transitions
Photonics
Quantum phenomena
Resonance scattering
Signal processing
Symmetry
ISSN:0031-9007, 1079-7114, 1079-7114
Online Access:Get full text
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Summary: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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ISSN:0031-9007
1079-7114
1079-7114
DOI:10.1103/PhysRevLett.124.053901