Non-Hermitian photonics based on parity–time symmetry

Nearly one century after the birth of quantum mechanics, parity–time symmetry is revolutionizing and extending quantum theories to include a unique family of non-Hermitian Hamiltonians. While conceptually striking, experimental demonstration of parity–time symmetry remains unexplored in quantum elec...

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Bibliographic Details
Published in:Nature photonics Vol. 11; no. 12; pp. 752 - 762
Main Authors: Feng, Liang, El-Ganainy, Ramy, Ge, Li
Format: Journal Article
Language:English
Published: London Nature Publishing Group UK 01.12.2017
Nature Publishing Group
Subjects:
639/624/1075
639/624/399/1015
639/624/400
Applied and Technical Physics
Electronic systems
Hamiltonian functions
Parity
Photonics
Physics
Physics and Astronomy
Quantum mechanics
Quantum Physics
Quantum theory
Review Article
Symmetry
ISSN:1749-4885, 1749-4893
Online Access:Get full text
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Summary:Nearly one century after the birth of quantum mechanics, parity–time symmetry is revolutionizing and extending quantum theories to include a unique family of non-Hermitian Hamiltonians. While conceptually striking, experimental demonstration of parity–time symmetry remains unexplored in quantum electronic systems. The flexibility of photonics allows for creating and superposing non-Hermitian eigenstates with ease using optical gain and loss, which makes it an ideal platform to explore various non-Hermitian quantum symmetry paradigms for novel device functionalities. Such explorations that employ classical photonic platforms not only deepen our understanding of fundamental quantum physics but also facilitate technological breakthroughs for photonic applications. Research into non-Hermitian photonics therefore advances and benefits both fields simultaneously. General concepts and recent developments of parity–time symmetry in classical photonics are reviewed.
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ISSN:1749-4885
1749-4893
DOI:10.1038/s41566-017-0031-1