3 years ago

Nonlinear quantum Langevin equations for bosonic modes in solid-state systems.

Francesco Massel, Juuso Manninen, Souvik Agasti

Based on the experimental evidence that impurities contribute to the dissipation properties of solid-state open quantum systems, we provide here a description in terms of nonlinear quantum Langevin equations of the role played by two-level systems in the dynamics of a bosonic degree of freedom. Our starting point is represented by the description of the system/environment coupling in terms of coupling to two separate reservoirs, modelling the interaction with external bosonic modes and two level systems, respectively. Furthermore, we show how this model represents a specific example of a class of open quantum systems that can be described by nonlinear quantum Langevin equations. Our analysis offers a potential explanation of the parametric effects recently observed in circuit-QED cavity optomechanics experiments.

Publisher URL: http://arxiv.org/abs/1711.00424

DOI: arXiv:1711.00424v1

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