Physics – Quantum Physics
Scientific paper
2010-03-08
J. Phys. A: Math. Theor. 43, 405304 (2010)
Physics
Quantum Physics
17 pages, 0 figures.
Scientific paper
10.1088/1751-8113/43/40/405304
We provide an in-depth and thorough treatment of the validity of the rotating-wave approximation (RWA) in an open quantum system. We find that when it is introduced after tracing out the environment, all timescales of the open system are correctly reproduced, but the details of the quantum state may not be. The RWA made before the trace is more problematic: it results in incorrect values for environmentally-induced shifts to system frequencies, and the resulting theory has no Markovian limit. We point out that great care must be taken when coupling two open systems together under the RWA. Though the RWA can yield a master equation of Lindblad form similar to what one might get in the Markovian limit with white noise, the master equation for the two coupled systems is not a simple combination of the master equation for each system, as is possible in the Markovian limit. Such a naive combination yields inaccurate dynamics. To obtain the correct master equation for the composite system a proper consideration of the non-Markovian dynamics is required.
Anastopoulos Charis
Cummings Nick I.
Fleming Chris
Hu Liang-Bin
No associations
LandOfFree
The Rotating-Wave Approximation: Consistency and Applicability from an Open Quantum System Analysis does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The Rotating-Wave Approximation: Consistency and Applicability from an Open Quantum System Analysis, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Rotating-Wave Approximation: Consistency and Applicability from an Open Quantum System Analysis will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-454153