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 |
Files in This Item:
File | Description | Size | Format | |
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Santos Sensitivity 2020 PhysRevResearch.2.013200.pdf | 1.07 MB | Adobe PDF | View/Open |
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