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arXiv · 1712.08533

Postquench prethermalization in a disordered quantum fluid of light

P. -É. Larré·D. Delande·N. Cherroret
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Abstract

We study the coherence of a disordered and interacting quantum light field after propagation along a nonlinear optical fiber. Disorder is generated by a cross-phase modulation with a randomized auxiliary classical light field, while interactions are induced by self-phase modulation. When penetrating the fiber from free space, the incoming quantum light undergoes a disorder and interaction quench. By calculating the coherence function of the transmitted quantum light, we show that the decoherence induced by the quench spreads in a light-cone fashion in the nonequilibrium many-body quantum system, leaving the latter prethermalize with peculiar features originating from disorder.

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P. -É. Larré, D. Delande, N. Cherroret. 2017-12-22. Postquench prethermalization in a disordered quantum fluid of light. https://doi.org/10.1103/physreva.97.043805

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