期刊
PHYSICAL REVIEW A
卷 94, 期 2, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.94.023803
关键词
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资金
- Royal Society
- Winton Programme for the Physics of Sustainability
- UK Engineering and Physical Sciences Research Council (EPSRC) [EP/M506485/1]
- Engineering and Physical Sciences Research Council [1642448] Funding Source: researchfish
We develop a Floquet approach to solve time-periodic quantum Langevin equations in the steady state. We show that two-time correlation functions of system operators can be expanded in a Fourier series and that a generalized Wiener-Khinchin theorem relates the Fourier transform of their zeroth Fourier component to the measured spectrum. We apply our framework to bichromatically driven cavity optomechanical systems, a setting in which mechanical oscillators have recently been prepared in quantum-squeezed states. Our method provides an intuitive way to calculate the power spectral densities for time-periodic quantum Langevin equations in arbitrary rotating frames.
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