Exact quantum dynamics in structured environments

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Gribben, Dominic and Strathearn, Aidan and Iles-Smith, Jake and Kilda, Dainius and Nazir, Ahsan and Lovett, Brendon W. and Kirton, Peter (2020) Exact quantum dynamics in structured environments. Physical Review Research, 2 (1). 013265. ISSN 2643-1564 (https://doi.org/10.1103/PhysRevResearch.2.013265)

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Abstract

The dynamics of a wide range of technologically important quantum systems are dominated by their interaction with just a few environmental modes. Such highly structured environments give rise to long-lived bath correlations that induce complex dynamics which are very difficult to simulate. These difficulties are further aggravated when spatial correlations between different parts of the system are important. By modeling the dynamics of a pair of two-level quantum systems in a common, structured, environment we show that a recently developed general purpose numerical approach, the time-evolving matrix product operator, is capable of accurate simulation under exactly these conditions. We find that tuning the separation to match the wavelength of the dominant environmental modes can drastically modify the system dynamics. To further explore this behavior, we show that the full dynamics of the bath can be calculated directly from those of the system, thus allowing us to develop intuition for the complex dynamics observed.

ORCID iDs

Gribben, Dominic, Strathearn, Aidan, Iles-Smith, Jake, Kilda, Dainius, Nazir, Ahsan, Lovett, Brendon W. and Kirton, Peter ORCID logoORCID: https://orcid.org/0000-0002-3915-1098;
  • Item type:Article
    ID code:71727
    Dates:
    Date
    Event
    5 March 2020
    Published
    31 January 2020
    Accepted
    Subjects:Science > Physics
    Department:Faculty of Science > Physics
    Depositing user: Pure Administrator
    Date deposited:09 Mar 2020 12:58
    Last modified:30 Nov 2024 01:16
    Related URLs:
    URI:https://strathprints.strath.ac.uk/id/eprint/71727
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