Thermal, quantum antibunching and lasing thresholds from single emitters to macroscopic devices

Mark Anthony Carroll, Giampaolo D'Alessandro, Gian Luca Lippi, Gian-Luca Oppo, Francesco Papoff

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Starting from a fully quantized Hamiltonian for an ensemble of identical emitters coupled to the modes of an optical cavity, we determine analytically regimes of thermal, collective anti-bunching and laser emission that depend explicitly on the number of emitters. The lasing regime is reached for a number of emitters above a critical number—which depends on the light-matter coupling, detuning, and the dissipation rates— via a universal transition from thermal emission to collective anti-bunching to lasing as the pump increases. Cases where the second order intensity correlation fails to predict laser action are also presented.
Original languageEnglish
Article number063902
Number of pages6
JournalPhysical Review Letters
Issue number6
Publication statusPublished - 10 Feb 2021


  • thermal
  • quantum
  • anti-bunching
  • lasing thresholds
  • single emitters
  • macroscopic devices

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