Non-Markovian quantum dynamics in strongly coupled multimode cavities conditioned on continuous measurement

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Link, Valentin and Müller, Kai and Lena, Rosaria G. and Luoma, Kimmo and Damanet, François and Strunz, Walter T. and Daley, Andrew J. (2022) Non-Markovian quantum dynamics in strongly coupled multimode cavities conditioned on continuous measurement. PRX Quantum, 3 (2). 020348. ISSN 2691-3399 (https://doi.org/10.1103/PRXQuantum.3.020348)

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Abstract

An important challenge in non-Markovian open quantum systems is to understand what information we gain from continuous measurement of an output field. For example, atoms in multimode cavity QED systems provide an exciting platform to study many-body phenomena in regimes where the atoms are strongly coupled amongst themselves and with the cavity, but the strong coupling makes it complicated to infer the conditioned state of the atoms from the output light. In this work we address this problem, describing the reduced atomic state via a conditioned hierarchy of equations of motion, which provides an exact conditioned reduced description under monitoring (and continuous feedback). We utilize this formalism to study how different monitoring for modes of a multimode cavity affects our information gain for an atomic state, and to improve spin squeezing via measurement and feedback in a strong coupling regime. This work opens opportunities to understand continuous monitoring of non-Markovian open quantum systems, both on a practical and fundamental level.

ORCID iDs

Link, Valentin, Müller, Kai, Lena, Rosaria G., Luoma, Kimmo, Damanet, François, Strunz, Walter T. and Daley, Andrew J. ORCID logoORCID: https://orcid.org/0000-0001-9005-7761;
  • Item type:Article
    ID code:81739
    Dates:
    Date
    Event
    6 June 2022
    Published
    6 June 2022
    Published Online
    18 April 2022
    Accepted
    Subjects:Science > Physics
    Science > Mathematics
    Department:Faculty of Science > Physics
    Depositing user: Pure Administrator
    Date deposited:05 Aug 2022 13:23
    Last modified:11 Nov 2024 13:35
    URI:https://strathprints.strath.ac.uk/id/eprint/81739
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