Quantum statistics in time-modulated exciton-photon system

TL;DR

This paper investigates a quantum dot-cavity system under time-modulated pumping, revealing non-classical behaviors such as sub-Poissonian statistics and negative Wigner functions, distinct from continuous-wave excitation regimes.

Contribution

It demonstrates how time-modulated external pumping induces non-classical states in a quantum dot-cavity system, differing from traditional continuous-wave excitation results.

Findings

Sub-Poissonian photon and exciton statistics observed.

Negative Wigner functions indicating non-classicality.

Results differ significantly from continuous-wave excitation regimes.

Abstract

We consider a system consisting of a large individual quantum dot with excitonic resonance coupled to a single mode photonic cavity in the nonlinear regime when exciton- exciton interaction becomes important. We show that in the presence of time-modulated external coherent pumping the system demonstrates essentially non classical behavior reflected in sub-Poissonian statistics of exciton- and photon-modes and the Wigner functions with negative values in phase-space for time-intervals exceeding the characteristic time of dissipative processes, $t\gg\gamma^{-1}$. It is shown that these results are cardinally different from the analogous results in the regime of the monomode continues-wave (cw) excitation.