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

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• Prof. Henning Schomerus, U of Lancaster
• Thursday 20 October 2011, 13:45-15:00
• Theory Library.

If you have a question about this talk, please contact Dr Dimitri M Gangardt.

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. I discuss how microreversibility-breaking quantum noise turns PT-symmetric systems into self-sustained sources of radiation, which distinguishes them from ordinary, Hermitian quantum systems [1].

[1] HS, Phys. Rev. Lett. 104, 233601 (2010).

This talk is part of the Theoretical Physics Seminars series.

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