2014/05/31 by Alessio Chiocchetta, Iacopo Carusotto · 1 citation
Mathematics · Physics and Astronomy · #Advanced Thermodynamics and Statistical Mechanics #Condensation #Condensed matter physics #Field (mathematics) #Langevin equation #Mathematics #Non-equilibrium thermodynamics #Photon #Physics #Polariton #Quantum #Quantum and electron transport phenomena #Quantum electrodynamics #Quantum fluctuation #Quantum mechanics #Statistical physics #Strong Light-Matter Interactions #Thermodynamics #cond-mat.mes-hall #cond-mat.quant-gas
paper · pdf · doi:10.1103/physreva.90.023633
published as Phys. Rev. A 90, 023633 (2014)
openalex publication_date 2014/08/28 · arxiv created 2014/11/28 · arxiv updated 2015/06/19 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We develop a quantum model for nonequilibrium Bose-Einstein condensation of photons and polaritons in planar microcavity devices. The model builds on laser theory and includes the spatial dynamics of the cavity field, a saturation mechanism, and some frequency dependence of the gain: quantum Langevin equations are written for a cavity field coupled to a continuous distribution of externally pumped two-level emitters with a well-defined frequency. As an example of application, the method is used to study the linearized quantum fluctuations around a steady-state condensed state. In the good-cavity regime, an effective equation for the cavity field only is proposed in terms of a stochastic Gross-Pitaevskii equation. Perspectives in view of a full quantum simulation of the nonequilibrium condensation process are finally sketched.