Dissipative phase transition in the two-photon Dicke model

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Jayesh Shah, Aanal and Kirton, Peter and Felicetti, Simone and Alaenian, Hadiseh (2025) Dissipative phase transition in the two-photon Dicke model. Physical Review Letters, 135 (17). 173602. ISSN 1079-7114 (https://doi.org/10.1103/mz92-6l9g)

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Abstract

We explore the dissipative phase transition of the two-photon Dicke model, a topic that has garnered significant attention recently. Our analysis reveals that while single-photon loss does not stabilize the intrinsic instability in the model, the inclusion of two-photon loss restores stability, leading to the emergence of superradiant states, which coexist with the normal vacuum states. Using a second-order cumulant expansion for the photons, we derive an analytical description of the system in the thermodynamic limit, which agrees well with the exact calculation results. Additionally, we present the Wigner function for the system, shedding light on the breaking of the 4 symmetry inherent in the model. These findings offer valuable insights into stabilization mechanisms in open quantum systems and pave the way for exploring complex nonlinear dynamics in two-photon Dicke models.

ORCID iDs

Jayesh Shah, Aanal, Kirton, Peter ORCID logoORCID: https://orcid.org/0000-0002-3915-1098, Felicetti, Simone and Alaenian, Hadiseh;
  • Item type:Article
    ID code:94545
    Dates:
    Date
    Event
    24 October 2025
    Published
    2 October 2025
    Accepted
    Subjects:Science > Physics
    Department:Faculty of Science > Physics
    Depositing user: Pure Administrator
    Date deposited:28 Oct 2025 10:02
    Last modified:03 Feb 2026 01:26
    Related URLs:
    URI:https://strathprints.strath.ac.uk/id/eprint/94545
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