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Open Quantum Systems Decoherence

Quadratic Models for Engineered Control of Open Quantum Systems

arXiv
Authors: J. P. P. Vieira, A. Lazarides, T. Ala-Nissila

Year

2020

Paper ID

18642

Status

Preprint

Abstract Read

~2 min

Abstract Words

106

Citations

N/A

Abstract

We introduce a framework to model the evolution of a class of open quantum systems whose environments periodically undergo an instantaneous non-unitary evolution stage. For the special case of quadratic models, we show how this approach can generalise the formalism of repeated interactions to allow for the preservation of system-environment correlations. Furthermore, its continuous zero-period limit provides a natural description of the evolution of small systems coupled to large environments in negligibly perturbed steady states. We explore the advantages and limitations of this approach in illustrative applications to thermalisation in a simple hopping ring and to the problem of initialising a qubit chain via environmental engineering.

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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 introduce a framework to model the evolution of a class of open quantum systems whose environments periodically undergo an instantaneous non-unitary evolution stage.

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References & Citation Signals

[1] DOI https://doi.org/arXiv:2012.04083 [2] arXiv https://arxiv.org/abs/2012.04083 [3] Publisher https://arxiv.org/abs/2012.04083

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