Decoherence and dissipation of a quantum harmonic oscillator coupled to two-level systems

Schlosshauer, Maximilian, Hines, A. P. and Milburn, G. J. (2008) Decoherence and dissipation of a quantum harmonic oscillator coupled to two-level systems. Physical Review A, 77 2: 022111.1-022111.7. doi:10.1103/PhysRevA.77.022111

Attached Files (Some files may be inaccessible until you login with your UQ eSpace credentials)
Name Description MIMEType Size Downloads
UQ172624_OA.pdf Full text (open access) application/pdf 214.52KB 0

Author Schlosshauer, Maximilian
Hines, A. P.
Milburn, G. J.
Title Decoherence and dissipation of a quantum harmonic oscillator coupled to two-level systems
Journal name Physical Review A   Check publisher's open access policy
ISSN 1050-2947
1094-1622
Publication date 2008-02-19
Year available 2008
Sub-type Article (original research)
DOI 10.1103/PhysRevA.77.022111
Open Access Status File (Publisher version)
Volume 77
Issue 2
Start page 022111.1
End page 022111.7
Total pages 7
Place of publication College Park, MD, United States
Publisher American Physical Society
Language eng
Abstract We derive and analyze the Born-Markov master equation for a quantum harmonic oscillator interacting with a bath of independent two-level systems. This hitherto virtually unexplored model plays a fundamental role as one of the four “canonical” system-environment models for decoherence and dissipation. To investigate the influence of further couplings of the environmental spins to a dissipative bath, we also derive the master equation for a harmonic oscillator interacting with a single spin coupled to a bosonic bath. Our models are experimentally motivated by quantum-electromechanical systems and micron-scale ion traps. Decoherence and dissipation rates are found to exhibit temperature dependencies significantly different from those in quantum Brownian motion. In particular, the systematic dissipation rate for the central oscillator decreases with increasing temperature and goes to zero at zero temperature, but there also exists a temperature-independent momentum-diffusion (heating) rate.
Keyword Browman-motion
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Article #022111

Document type: Journal Article
Sub-type: Article (original research)
Collections: 2009 Higher Education Research Data Collection
School of Mathematics and Physics
 
Versions
Version Filter Type
Citation counts: TR Web of Science Citation Count  Cited 23 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 17 times in Scopus Article | Citations
Google Scholar Search Google Scholar
Created: Tue, 31 Mar 2009, 00:25:44 EST by Jo Hughes on behalf of School of Mathematics & Physics