Influence of dissipation on the extraction of quantum states via repeated measurements

Details Influence of dissipation on the extraction of quantum states via repeated measurements Influence of dissipation on the extraction of quantum states via repeated measurements

2007-06-14

arxiv.org/abs/0706.2111v2

Phys. Rev. A. 76, 042110 (2007)

Physics

Quantum Physics

10 pages, 3 figures

Scientific paper

10.1103/PhysRevA.76.042110

A quantum system put in interaction with another one that is repeatedly measured is subject to a non-unitary dynamics, through which it is possible to extract subspaces. This key idea has been exploited to propose schemes aimed at the generation of pure quantum states (purification). All such schemes have so far been considered in the ideal situations of isolated systems. In this paper, we analyze the influence of non-negligible interactions with environment during the extraction process, with the scope of investigating the possibility of purifying the state of a system in spite of the sources of dissipation. A general framework is presented and a paradigmatic example consisting of two interacting spins immersed in a bosonic bath is studied. The effectiveness of the purification scheme is discussed in terms of purity for different values of the relevant parameters and in connection with the bath temperature.

Affiliated with

Also associated with

No associations

Rating

Influence of dissipation on the extraction of quantum states via repeated measurements 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 Influence of dissipation on the extraction of quantum states via repeated measurements, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Influence of dissipation on the extraction of quantum states via repeated measurements will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-331150