Competition between memory-keeping and memory-erasing decoherence channels

Tony J. G. Apollaro, Salvatore Lorenzo, Carlo Di Franco, Francesco Plastina, Mauro Paternostro

Research output: Contribution to journalArticlepeer-review

20 Citations (Scopus)
244 Downloads (Pure)

Abstract

We study the competing effects of simultaneous Markovian and non-Markovian decoherence mechanisms acting on a single spin. We show the existence of a threshold in the relative strength of such mechanisms above which the spin dynamics becomes fully Markovian, as revealed by the use of several non-Markovianity measures. We identify a measure-dependent nested structure of such thresholds, hinting at a causality relationship among the various non-Markovianity witnesses used in our analysis. Our considerations are then used to argue the unavoidably non-Markovian evolution of a single-electron quantum dot exposed to both intrinsic and Markovian technical noise, the latter of arbitrary strength. 

Original languageEnglish
Article number012310
Number of pages8
JournalPhysical Review A (Atomic, Molecular, and Optical Physics)
Volume90
Issue number1
DOIs
Publication statusPublished - 08 Jul 2014

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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