Behavior of a Single-Atom Laser in the Sub-Poissonian Regime

TL;DR

This paper theoretically investigates a single-atom laser operating in the sub-Poissonian regime, deriving analytical expressions for photon statistics and revealing non-classical light behavior.

Contribution

It provides analytical solutions for photon number and distribution in a single-atom laser, highlighting sub-Poissonian statistics in the strong-coupling regime.

Findings

Photon statistics are sub-Poissonian.

Mean photon number increases as pump approaches zero.

Exact photon distribution function derived in strong-coupling limit.

Abstract

In the present work the model of a single-atom laser generating in the regime when incoherent pumping rate coincides with the cavity decay rate is theoretically investigated. Using the stationary equation for the phase averaged Glauber P function the analytical expressions for mean number of photons and its dispersion are obtained. In the limiting case of the strong-coupling regime the exact expression for the photon number distribution function is found. Obtained results describe the sub-Poissonian photon statistics and show an increase in mean number of photons to non-zero value when the pump tends to zero.