Photonic Josephson effect, phase transitions, and chaos in optomechanical systems

Details Photonic Josephson effect, phase transitions, and chaos in optomechanical systems Photonic Josephson effect, phase transitions, and chaos in optomechanical systems

2010-09-15

arxiv.org/abs/1009.2945v2

Phys. Rev. A 84, 021804(R) (2011)

Physics

Quantum Physics

4 pages, 2 figures

Scientific paper

10.1103/PhysRevA.84.021804

A photonic analog of the Josephson effect is analyzed for a system formed by a partly transparent mechanical membrane dividing an optical cavity into two halves. Photons tunneling between the two sub-cavities constitute the coherent Jospehson current. The force acting upon the membrane due to the light pressure induces a nonlinearity which results in a rich dynamical structure. For example, contrary to standard bosonic Josephson systems, we encounter chaos. By means of a mean-field approach we identify the various regimes and corresponding phase diagram. At the short time scale, chaos is demonstrated to prevent regular self-trapping, while for longer times a dissipation induced self-trapping effect is possible.

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