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Dissipation-Induced Superradiance in a Non-Markovian Open Dicke Model

Abstract : We consider the Dicke model, describing an ensemble of $N$ quantum spins interacting with a cavity field, and study how the coupling to a non-Markovian environment with power-law spectrum changes the physics of superradiant phase transition. Quite remarkably we find that dissipation can induce, rather than suppress, the ordered phase, a result which is in striking contrast with both thermal and Markovian quantum baths. We interpret this dissipation-induced superradiance as a genuine dissipative quantum phase transition that exists even at finite $N$ due to the coupling with the bath modes and whose nature and critical properties strongly depend on the spectral features of the non-Markovian environment.
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Submitted on : Monday, February 13, 2017 - 4:10:27 PM
Last modification on : Friday, January 7, 2022 - 3:51:36 AM
Long-term archiving on: : Sunday, May 14, 2017 - 2:43:19 PM


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  • HAL Id : cea-01466611, version 1
  • ARXIV : 1611.09378


Orazio Scarlatella, Marco Schiró. Dissipation-Induced Superradiance in a Non-Markovian Open Dicke Model. 2017. ⟨cea-01466611⟩



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