dc.contributor.author | Dalla Torre, Emanuele | |
dc.contributor.author | Diehl, Sebastian | |
dc.contributor.author | Lukin, Mikhail D. | |
dc.contributor.author | Sachdev, Subir | |
dc.contributor.author | Strack, Philipp | |
dc.date.accessioned | 2014-02-11T13:21:19Z | |
dc.date.issued | 2013 | |
dc.identifier.citation | Torre, Emanuele, Sebastian Diehl, Mikhail Lukin, Subir Sachdev, and Philipp Strack. 2013. “Keldysh approach for nonequilibrium phase transitions in quantum optics: Beyond the Dicke model in optical cavities.” Physical Review A 87 (2) (February 21). doi:10.1103/PhysRevA.87.023831. http://dx.doi.org/10.1103/PhysRevA.87.023831. | en_US |
dc.identifier.issn | 1050-2947 | en_US |
dc.identifier.uri | http://nrs.harvard.edu/urn-3:HUL.InstRepos:11688797 | |
dc.description.abstract | We investigate non-equilibrium phase transitions for driven atomic ensembles, interacting with a cavity mode, coupled to a Markovian dissipative bath. In the thermodynamic limit and at low-frequencies, we show that the distribution function of the photonic mode is thermal, with an e↵ective temperature set by the atom-photon interaction strength. This behavior characterizes the static and dynamic critical exponents of the associated su- perradiance transition. Motivated by these considerations, we develop a general Keldysh path integral approach, that allows us to study physically relevant nonlinearities beyond the idealized Dicke model. Using standard diagrammatic techniques, we take into account the leading-order corrections due to the finite number of atoms N. For finite N, the photon mode behaves as a damped, classical non-linear oscillator at finite temperature. For the atoms, we propose a Dicke action that can be solved for any N and correctly captures the atoms’ depolarization due to dissipative dephasing. | en_US |
dc.description.sponsorship | Physics | en_US |
dc.language.iso | en_US | en_US |
dc.publisher | American Physical Society | en_US |
dc.relation.isversionof | doi:10.1103/PhysRevA.87.023831 | en_US |
dash.license | OAP | |
dc.title | Keldysh approach for nonequilibrium phase transitions in quantum optics: Beyond the Dicke model in optical cavities | en_US |
dc.type | Journal Article | en_US |
dc.description.version | Author's Original | en_US |
dc.relation.journal | Physical Review A | en_US |
dash.depositing.author | Sachdev, Subir | |
dc.date.available | 2014-02-11T13:21:19Z | |
dc.identifier.doi | 10.1103/PhysRevA.87.023831 | * |
dash.authorsordered | false | |
dash.contributor.affiliated | Dalla Torre, Emanuele | |
dash.contributor.affiliated | Strack, Philipp | |
dash.contributor.affiliated | Sachdev, Subir | |
dash.contributor.affiliated | Lukin, Mikhail | |