2005/04/21 by Iacopo Carusotto, Cristiano Ciuti · 110 citations
Engineering · Mathematics · Physics and Astronomy · #Coherence (philosophical gambling strategy) #Condensed matter physics #Mathematics #Monte Carlo method #Parametric statistics #Physics #Plasmonic and Surface Plasmon Research #Polariton #Quantum mechanics #Statistical physics #Statistics #Strong Light-Matter Interactions #Thermal Radiation and Cooling Technologies #cond-mat.other
paper · pdf · doi:10.1103/physrevb.72.125335
published in Physical Review B 72(12) (American Physical Society)
arxiv created 2005/04/21 · openalex publication_date 2005/09/21 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We investigate the appearance of spontaneous coherence in the parametric emission from planar semiconductor microcavities in the strong coupling regime. Calculations are performed by means of a quantum Monte Carlo technique based on the Wigner representation of the coupled exciton and cavity-photon fields. The numerical results are interpreted in terms of a nonequilibrium phase transition occurring at the parametric oscillation threshold: below the threshold, the signal emission is incoherent, and both the first and the second-order coherence functions have a finite correlation length which becomes macroscopic as the threshold is approached. Above the threshold, the emission is instead phase coherent over the whole two-dimensional sample and intensity fluctuations are suppressed. Similar calculations for quasi-one-dimensional microcavities show that in this case the phase coherence of the signal emission has a finite extension even above the threshold, while intensity fluctuations are suppressed.