Quantum theory of polariton weak lasing and polarization bifurcations

Abstract

The quantum theory of polariton condensation in a trapped state reveals a second-order phase transition evidenced by spontaneous polarization parity breaking in sub-spaces of fixed polariton occupation numbers. The emission spectra of a polariton condensate demonstrate the coexistence of a symmetry-conserving condensate state with {linear} polarization and two symmetry-broken elliptically polarized states in the vicinity of the threshold. As a result, an oscillating linearly polarized second-order coherence $g_{xx}^{(2)}(t)$, with $g_{xx}^{(2)}(t)<1$ over some time intervals is obtained. Spontaneous symmetry breaking is reflected in the second-order cross correlator of circular polarizations. A related build-up of elliptically-polarized weak lasing also results in non-monotonous dependence of the circular second-order coherence on excitation power and interaction strength.

8 pages, 6 figures

References in corpus (11)

• Single photons from coupled quantum modes
• Spontaneous Polarisation Build up in a Room Temperature Polariton Laser
• Van der Waals Heterostructure Polaritons with moiré-Induced Nonlinearity
• Spontaneous spin bifurcations and ferromagnetic phase transitions in a spinor exciton-polariton condensate
• Spin order and phase transitions in chains of polariton condensates
• Spontaneous symmetry breaking in a polariton and photon laser
• A Polariton Graph Simulator
• Signature of the microcavity exciton-polariton relaxation mechanism in the polarization of emitted light
• Critical fluctuations in a confined driven-dissipative quantum condensate
• Probing many-body correlations using quantum-cascade correlation spectroscopy
• Interplay between polarization and quantum correlations of confined polaritons