A1 Journal article (refereed)
Nonlinear quantum Langevin equations for bosonic modes in solid-state systems (2017)

Manninen, J., Agasti, S., & Massel, F. (2017). Nonlinear quantum Langevin equations for bosonic modes in solid-state systems. Physical Review A, 96(6), Article 063830. https://doi.org/10.1103/PhysRevA.96.063830

JYU authors or editors

Agasti, Souvik
Massel, Francesco

Publication details

All authors or editors: Manninen, Juuso; Agasti, Souvik; Massel, Francesco

Journal or series: Physical Review A

ISSN: 2469-9926

eISSN: 2469-9934

Publication year: 2017

Volume: 96

Issue number: 6

Article number: 063830

Publisher: American Physical Society

Publication country: United States

Publication language: English

DOI: https://doi.org/10.1103/PhysRevA.96.063830

Publication open access: Openly available

Publication channel open access: Open Access channel

Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/56755

Web address where publication is available: https://arxiv.org/abs/1711.00424

Abstract

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.

Free keywords: Langevin equations; solid-state systems

Fields of science: