Universal non-Markovianity detection in hybrid open quantum systems

Svozilík, Jiří; Hidalgo-Sacoto, Raúl; Arkhipov, Ievgen I.

doi:10.1038/s41598-020-75329-6

Cited by 3 publications

(1 citation statement)

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“…Another class of techniques developed to witness quantum non-Markovianity relies upon the effects of non-Markovian dynamics on quantum correlations [18][19][20][21]. Among these, the notion of quantum steering, also known as EPR steering in continuous-variable quantum information, identifies a form of correlation between two spatially separated parts of a bipartite quantum system, such that one party may exploit local measurements to "steer" the quantum state of the other one [22].…”

Section: Introductionmentioning

confidence: 99%

Exploiting Gaussian steering to probe non-Markovianity due to the interaction with a structured environment

Frigerio,

Hesabi,

Afshar

et al. 2021

Preprint

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We put forward a measure based on Gaussian steering to quantify the non-Markovianity of continuous-variable (CV) Gaussian quantum channels. We employ the proposed measure to assess and compare the non-Markovianity of a quantum Brownian motion (QBM) channel, originating from the interaction with Ohmic and sub-Ohmic environments with spectral densities described by a Lorentz-Drude cutoff, both at high and low temperatures, showing that sub-Ohmic, high temperature environments lead to highly non-Markovian evolution, with cyclic backflows of Gaussian steerability from the environment to the system. Our results add to the understanding of the interplay between quantum correlations and non-Markovianity for CV systems, and could be implemented at the experimental level to quantify non-Markovianity in some physical scenarios.

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