Physics – Quantum Physics
Scientific paper
2007-03-07
Physics
Quantum Physics
Accepted for publication in J. Phys. A: Math. Theor.; 23 pages, 8 figures
Scientific paper
We study a generic open quantum system where the coupling between the system and its environment is of an energy-preserving quantum nondemolition (QND) type. We obtain the general master equation for the evolution of such a system under the influence of a squeezed thermal bath of harmonic oscillators. From the master equation it can be seen explicitly that the process involves decoherence or dephasing without any dissipation of energy. We work out the decoherence-causing term in the high and zero temperature limits and check that they match with known results for the case of a thermal bath. The decay of the coherence is quantified as well by the dynamics of the linear entropy of the system under various environmental conditions. We make a comparison of the quantum statistical properties between QND and dissipative types of evolution using a system of two-level atom and a harmonic oscillator.
Banerjee Subhashish
Ghosh Rahul
No associations
LandOfFree
Dynamics of decoherence without dissipation in a squeezed thermal 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 Dynamics of decoherence without dissipation in a squeezed thermal bath, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dynamics of decoherence without dissipation in a squeezed thermal bath will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-255472