Decoherence by a chaotic many-spin bath

Details Decoherence by a chaotic many-spin bath Decoherence by a chaotic many-spin bath

2004-05-31

arxiv.org/abs/quant-ph/0406001v1

Physics

Quantum Physics

4 pages, RevTeX, 5 eps figures

Scientific paper

10.1103/PhysRevE.72.026225

We numerically investigate decoherence of a two-spin system (central system) by a bath of many spins 1/2. By carefully adjusting parameters, the dynamical regime of the bath has been varied from quantum chaos to regular, while all other dynamical characteristics have been kept practically intact. We explicitly demonstrate that for a many-body quantum bath, the onset of quantum chaos leads to significantly faster and stronger decoherence compared to an equivalent non-chaotic bath. Moreover, the non-diagonal elements of the system's density matrix decay differently for chaotic and non-chaotic baths. Therefore, knowledge of the basic parameters of the bath (strength of the system-bath interaction, bath's spectral density of states) is not always sufficient, and much finer details of the bath's dynamics can strongly affect the decoherence process.

Affiliated with

Also associated with

No associations

Rating

Decoherence by a chaotic many-spin bath 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 by a chaotic many-spin bath, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Decoherence by a chaotic many-spin bath will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-267266