Quantum noise and self-sustained radiation of PT-symmetric systems

Details Quantum noise and self-sustained radiation of PT-symmetric systems Quantum noise and self-sustained radiation of PT-symmetric systems

2010-01-04

arxiv.org/abs/1001.0539v2

Phys. Rev. Lett. 104, 233601 (2010)

Physics

Quantum Physics

4+1 pages (slightly expanded published version)

Scientific paper

10.1103/PhysRevLett.104.233601

The observation that PT-symmetric Hamiltonians can have real-valued energy levels even if they are non-Hermitian has triggered intense activities, with experiments, in particular, focusing on optical systems, where Hermiticity can be broken by absorption and amplification. For classical waves, absorption and amplification are related by time-reversal symmetry. This work shows that microreversibility-breaking quantum noise turns PT-symmetric systems into self-sustained sources of radiation, which distinguishes them from ordinary, Hermitian quantum systems.

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