A1 Refereed original research article in a scientific journal

Revealing memory effects in phase-covariant quantum master equations




AuthorsTeittinen J, Lyyra H, Sokolov B, Maniscalco S

PublisherIOP PUBLISHING LTD

Publication year2018

JournalNew Journal of Physics

Journal name in sourceNEW JOURNAL OF PHYSICS

Journal acronymNEW J PHYS

Article numberARTN 073012

Volume20

Number of pages13

ISSN1367-2630

DOIhttps://doi.org/10.1088/1367-2630/aacc38

Self-archived copy’s web addresshttps://research.utu.fi/converis/portal/detail/Publication/32174185


Abstract
We study and compare the sensitivity of multiple non-Markovianity indicators for a qubit subjected to general phase-covariant noise. For each of the indicators, we derive analytical conditions to detect the dynamics as non-Markovian. We present these conditions as relations between the time-dependent decay rates for the general open system dynamics and its commutative and unital subclasses. These relations tell directly if the dynamics is non-Markovian w.r.t.. each indicator, without the need to explicitly derive and specify the analytic form of the time-dependent coefficients. Moreover, with a shift in perspective, we show that if one assumes only the general form of the master equation, measuring the non-Markovianity indicators gives us directly non-trivial information on the relations between the unknown decay rates.

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Last updated on 2024-26-11 at 13:01