Journal
PHYSICAL REVIEW A
Volume 87, Issue 5, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.87.052109
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Funding
- Engineering and Physical Sciences Research Council [EP/J016349/1]
- Scottish Doctoral Training Centre in Condensed Matter Physics
- Emil Aaltonen foundation
- Magnus Ehrnrooth Foundation
- Finnish Cultural foundation
- EPSRC [EP/J016349/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [1281403, EP/J016349/1] Funding Source: researchfish
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We study non-Markovianity as backflow of information in two-qubit systems. We consider a setting where, by changing the distance between the qubits, one can interpolate between independent reservoir and common reservoir scenarios. We demonstrate that non-Markovianity can be induced by the common reservoir and single out the physical origin of this phenomenon. We show that two-qubit non-Markovianity coincides with instances of nondivisibility of the corresponding dynamical map, and we discuss the pair of states maximizing information flowback. We also discuss the issue of additivity for the measure we use and in doing so give an indication of its usefulness as a resource for multipartite quantum systems.
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