Two-photon statistics of nonclassical radiation in the dissipative finite-size Dicke model

TL;DR

This paper investigates nonclassical photon behavior in the dissipative finite-size Dicke model using two-photon correlation functions, revealing how coupling strength, qubit number, and temperature influence photon statistics.

Contribution

It introduces a combined approach of quantum dressed master equation and extended coherent states to analyze two-photon correlations in an open Dicke model, highlighting new effects of system parameters.

Findings

Transition from anti-bunching to bunching with coupling tuning

Optimal qubit number enhances two-photon correlations

Thermal bath bias induces strong two-photon bunching

Abstract

The nonclassical feature of photons in the open finite-size Dicke model is investigated via the two-photon correlation function. The quantum dressed master equation combined with the extended coherent photonic states is applied to analyze the dissipative dynamics of both the photons and qubits. The anti-bunching to bunching transition of photons is clearly observed by tuning the qubit-photon coupling strength. The optimal qubits number is unraveled to enhance the two-photon correlation function. Moreover, the temperature bias of thermal baths induces significant two-photon bunching signature with deep strong qubit-photon interaction.