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Revealing memory effects in phase-covariant quantum master equations
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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New Journal of Physics, Volume 20, issue 7, pp. 1-13
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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Teittinen, J, Lyyra, H, Sokolov, B & Maniscalco, S 2018, 'Revealing memory effects in phase-covariant quantum master equations', New Journal of Physics, vol. 20, no. 7, 073012, pp. 1-13. https://doi.org/10.1088/1367-2630/aacc38