Show simple item record

dc.contributor.authorSantos, Lea F.
dc.contributor.authorNiknam, Mohamad
dc.contributor.authorCory, David G.
dc.identifier.citationSantos, Lea F., Niknam, Mohamad and Cory, David G. (2020). Sensitivity of quantum information to environment perturbations measured with a nonlocal out-of-time-order correlation function. Physical Review Research 2, 013200.en_US
dc.descriptionResearch article, peer-reviewed. Open Access.en_US
dc.description.abstractIn a quantum system coupled with a non-Markovian environment, quantum information may flow out of or into the system. Measuring quantum information flow and its sensitivity to perturbations is important for a better understanding of open quantum systems and for the implementation of quantum technologies. Information gets shared between a quantum system and its environment by means of system-environment correlations (SECs)that grow during their interaction. We design a nuclear magnetic resonance (NMR) experiment to directly observe the evolution of the SECs and use the second moment of their distribution as a natural metric for quantifying the flow of information. In a second experiment, by accounting for the environment dynamics,we study the sensitivity of the shared quantum information to perturbations in the environment. The metricused in this case is a nonlocal out-of-time-order correlation function (OTOC). By analyzing the decay of the OTOC as a function of the SEC spread, instead of the evolution time, we are able to demonstrate its exponential behavior.en_US
dc.description.sponsorshipACKNOWLEDGMENTS: The research results communicated here would not be possible without the significant contributions of the Canada First Research Excellence Fund, Canada Excellence Research Chairs program, Canada Foundation for Innovation, the Ontario Ministry of Research & Innovation, Industry Canada and Mike & Ophelia Lazaridis. Their support is gratefully acknowledged. L.F.S. was supported by the NSF Grant No.DMR-1603418.en_US
dc.publisherAmerican Physical Societyen_US
dc.relation.ispartofseriesPhysical Review Research;2 (2020)
dc.rightsAttribution-NonCommercial-NoDerivs 3.0 United States*
dc.subjectnuclear magnetic resonance (NMR)en_US
dc.subjectopen quantum systemsen_US
dc.subjectnonlocal out-of-time-order correlation function (OTOC)en_US
dc.subjectquantum information flow measurementen_US
dc.titleSensitivity of quantum information to environment perturbations measured with a nonlocal out-of-time-order correlation function.en_US

Files in this item


This item appears in the following Collection(s)

Show simple item record

Attribution-NonCommercial-NoDerivs 3.0 United States
Except where otherwise noted, this item's license is described as Attribution-NonCommercial-NoDerivs 3.0 United States