Full Counting Statistics of Photons Emitted by Double Quantum Dot

TL;DR

This paper investigates the photon emission statistics from a double quantum dot coupled to a microwave resonator, revealing sub-Poissonian behavior and antibunching under resonant conditions, with implications for quantum photodetection.

Contribution

It provides a detailed analysis of photon counting statistics in a DQD-resonator system, highlighting conditions for sub-Poissonian emission and proposing experimental assessment methods.

Findings

Photon statistics show sub-Poissonian distribution at resonance.

Photon noise can be reduced below half of Poisson noise.

Photon distribution remains sub-Poissonian despite moderate decoherence.

Abstract

We analyze the full counting statistics of photons emitted by a double quantum dot (DQD) coupled to a high-quality microwave resonator by electric dipole interaction. We show that at the resonant condition between the energy splitting of the DQD and the photon energy in the resonator, photon statistics exhibits both a sub-Poissonian distribution and antibunching. In the ideal case, when the system decoherence stems only from photodetection, the photon noise is reduced below one-half of the noise for the Poisson distribution and is consistent with current noise. The photon distribution remains sub-Poissonian even at moderate decoherence in the DQD. We demonstrate that Josephson junction based photomultipliers can be used to experimentally assess statistics of emitted photons.