Exact non-Markovian cavity dynamics strongly coupled to a reservoir

Journal Article · Thu Jul 15 04:00:00 EDT 2010 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.82.012105· OSTI ID:21440458

Xiong, Heng-Na ^[1]; Zhang, Wei-Min; Wu, Meng-Hsiu ^[1]; Xiaoguang, Wang ^[2]

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1. Department of Physics and Center for Quantum Information Science, National Cheng Kung University, Tainan 70101, Taiwan (China)
2. Zhejiang Institute of Modern Physics and Department of Physics, Zhejiang University, Hangzhou (China)

The exact non-Markovian dynamics of a microcavity strongly coupled to a general reservoir at arbitrary temperature are studied. With the exact master equation for the reduced density operator of the cavity system, we analytically solve the time evolution of the cavity state and the associated physical observables. We show that the non-Markovian dynamics are completely determined by the propagating (retarded) and correlation Green functions. Comparing the non-Markovian behavior at finite temperature with those at the zero-temperature limit or Born-Markov limit, we find that the non-Markovian memory effect can dramatically change the coherent and thermal dynamics of the cavity. We also numerically study the dissipation dynamics of the cavity through the mean mode amplitude decay and the average photon number decay in the microwave regime. It is shown that the strong coupling between the cavity and the reservoir results in a long-time dissipationless evolution to the cavity field amplitude, and its noise dynamics undergo a critical transition from the weak to the strong coupling due to the non-Markovian memory effect.

• OSTI ID: 21440458
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 1 Vol. 82; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
AMPLITUDES
BOSONS
CAVITY RESONATORS
CORRELATIONS
COUPLING
ELECTROMAGNETIC RADIATION
ELECTRONIC EQUIPMENT
ELEMENTARY PARTICLES
EQUIPMENT
FUNCTIONS
GREEN FUNCTION
MARKOV PROCESS
MASSLESS PARTICLES
MATHEMATICAL OPERATORS
MICROWAVE RADIATION
NOISE
PHOTONS
QUANTUM OPERATORS
RADIATIONS
RESONATORS
STOCHASTIC PROCESSES