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arxiv 1804.03861 v3 pith:6NY2UAVG submitted 2018-04-11 quant-ph cond-mat.stat-mech

Entropy production and correlations in a controlled non-Markovian setting

classification quant-ph cond-mat.stat-mech
keywords systemcorrelationsentropyproductionbathexaminenon-markovianqubit
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We study the relationship between (non-)Markovian evolutions, established correlations, and the entropy production rate. We consider a system qubit in contact with a thermal bath and in addition the system is strongly coupled to an ancillary qubit. We examine the steady state properties finding that the coupling leads to effective temperatures emerging in the composite system, and show that this is related to the creation of correlations between the qubits. By establishing the conditions under which the system reaches thermal equilibrium with the bath despite undergoing a non-Markovian evolution, we examine the entropy production rate, showing that its transient negativity is a sufficient sign of non-Markovianity.

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