Please use this identifier to cite or link to this item: https://hdl.handle.net/20.500.12202/6441
Title: Sensitivity of quantum information to environment perturbations measured with a nonlocal out-of-time-order correlation function.
Authors: Santos, Lea F.
Niknam, Mohamad
Cory, David G.
0000-0001-9400-2709
Keywords: nuclear magnetic resonance (NMR)
open quantum systems
nonlocal out-of-time-order correlation function (OTOC)
quantum information flow measurement
metrics
Issue Date: 24-Feb-2020
Publisher: American Physical Society
Citation: Santos, 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.
Series/Report no.: Physical Review Research;2 (2020)
Abstract: In 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.
Description: Research article, peer-reviewed. Open Access.
URI: https://journals.aps.org/prresearch/pdf/10.1103/PhysRevResearch.2.013200
https://doi.org/10.1103/PhysRevResearch.2.013200
https://hdl.handle.net/20.500.12202/6441
ISSN: 2643-1564
Appears in Collections:Stern College for Women -- Faculty Publications

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