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

Juuso Manninen, Souvik Agasti, Francesco Massel

Research output: Contribution to journalArticleScientificpeer-review

2 Citations (Scopus)
123 Downloads (Pure)


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, modeling 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.

Original languageEnglish
Article number063830
Pages (from-to)1-8
JournalPhysical Review A
Issue number6
Publication statusPublished - 20 Dec 2017
MoE publication typeA1 Journal article-refereed

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