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  • PhysRevLett 104 233601

    Rights statement: © 2010 The American Physical Society

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

Research output: Contribution to journalJournal articlepeer-review

Article number233601
<mark>Journal publication date</mark>8/06/2010
<mark>Journal</mark>Physical review letters
Issue number23
Number of pages0
Publication StatusPublished
<mark>Original language</mark>English


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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© 2010 The American Physical Society