Decoherence and thermalization dynamics of a quantum oscillator

Details Decoherence and thermalization dynamics of a quantum oscillator Decoherence and thermalization dynamics of a quantum oscillator

2000-04-19

arxiv.org/abs/quant-ph/0004075v1

J. Opt. B, v.2, no.3, p.271-281 (2000)

Physics

Quantum Physics

24 pages, LaTex, 8 ps figures, accepted for publication in J. Opt. B

Scientific paper

10.1088/1464-4266/2/3/309

We introduce the quantitative measures characterizing the rates of decoherence and thermalization of quantum systems. We study the time evolution of these measures in the case of a quantum harmonic oscillator whose relaxation is described in the framework of the standard master equation, for various initial states (coherent, `cat', squeezed and number). We establish the conditions under which the true decoherence measure can be approximated by the linear entropy $1-{Tr}\hat\rho^2$. We show that at low temperatures and for highly excited initial states the decoherence process consists of three distinct stages with quite different time scales. In particular, the `cat' states preserve 50% of the initial coherence for a long time interval which increases logarithmically with increase of the initial energy.

Affiliated with

Also associated with

No associations

Rating

Decoherence and thermalization dynamics of a quantum oscillator 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 Decoherence and thermalization dynamics of a quantum oscillator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Decoherence and thermalization dynamics of a quantum oscillator will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-314302