Risultati scientifici

Pseudothermalization in driven-dissipative non-Markovian open quantum systems

Anno: 2018

Autori: Lebreuilly J., Chiocchetta A., Carusotto I.

Affiliazione autori: [Lebreuilly, Jose; Carusotto, Iacopo] CNR, INO, BEC Ctr, I-38123 Povo, Italy and Univ Trento, Dipartimento Fis, I-38123 Povo, Italy.
[Chiocchetta, Alessio] Univ Cologne, Inst Theoret Phys, D-50937 Cologne, Germany.

Abstract: We investigate a pseudothermalization effect, where an open quantum system coupled to a nonequilibrated environment consisting of several non-Markovian reservoirs presents an emergent thermal behavior. This thermal behavior is visible at both static and dynamical levels and the system satisfies the fluctuation-dissipation theorem. Our analysis is focused on the exactly solvable model of a weakly interacting driven-dissipative Bose gas in presence of frequency-dependent particle pumping and losses, and is based on a quantum Langevin theory, which we derive starting from a microscopical quantum optics model. For generic non-Markovian reservoirs, we demonstrate that the emergence of thermal properties occurs in the range of frequencies corresponding to low-energy excitations. For the specific case of non-Markovian baths verifying the Kennard-Stepanov relation, we show that pseudothermalization can instead occur at all energy scales. The possible implications regarding the interpretation of thermal laws in low-temperature exciton-polariton experiments are discussed. We finally show that the presence of either a saturable pumping or a dispersive environment leads to a breakdown of the pseudothermalization effect.

Giornale/Rivista: PHYSICAL REVIEW A

Volume: 97 (3)      Da Pagina: 033603-1  A: 033603-20

Parole chiavi: Bose-Einstein condensation; microcavity; polaritons; photons; states
DOI: 10.1103/PhysRevA.97.033603

Citazioni: 7
dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2021-12-05
Riferimenti tratti da Isi Web of Knowledge: (solo abbonati)
Link per visualizzare la scheda su IsiWeb: Clicca qui
Link per visualizzare la citazioni su IsiWeb: Clicca qui

gdpr-image
This site uses cookies. If you decide to continue browsing we consider that you accept their use. For more information about cookies and how to delete them please read our Info Policy on cookies use.
Read more