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Open Quantum Systems Decoherence

Structure of states for which each localized dynamics reduces to a localized subdynamics

arXiv
Authors: Iman Sargolzahi, Sayyed Yahya Mirafzali

Year

2016

Paper ID

7780

Status

Preprint

Abstract Read

~2 min

Abstract Words

166

Citations

N/A

Abstract

We consider a bipartite quantum system S (including parties A and B), interacting with an environment E through a localized quantum dynamics mathcal{F}SE . We call a quantum dynamics mathcal{F}SE localized if, e.g., the party A is isolated from the environment and only B interacts with the environment: mathcal{F}SE=idAotimes mathcal{F}BE, where idA is the identity map on the part A and mathcal{F}BE is a completely positive (CP) map on the both B and E. We will show that the reduced dynamics of the system is also localized as mathcal{E}S=idAotimes bar{mathcal{E}}B, where bar{mathcal{E}}B is a CP map on B, if and only if the initial state of the system-environment is a Markov state. We then generalize this result to the two following cases: when both A and B interact with a same environment, and when each party interacts with its local environment.

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  • This paper contributes to the Open Quantum Systems & Decoherence research area in the Quantum Articles archive.
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  • We consider a bipartite quantum system S (including parties A and B), interacting with an environment E through a localized quantum dynamics mathcalFSE .

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