$N$-photon bundle statistics in different solid-state platforms

TL;DR

This paper investigates the statistical properties of $N$-photon emission bundles in solid-state cavity QED systems, analyzing how environmental factors affect their characteristic photon number distributions.

Contribution

It compares two solid-state platforms, revealing conditions under which $N$-photon bundle statistics are observable despite environmental influences.

Findings

Environmental noise degrades bundle statistics in quantum-dot microcavities.

Superconducting qubits can exhibit clear $N$-photon bundle statistics under feasible conditions.

Bundle statistics are sensitive to dephasing mechanisms in solid-state systems.

Abstract

The term $N$-photon bundles has been coined for a specific type of photon emission, where light quanta are released from a cavity only in groups of $N$ particles. This emission leaves a characteristic number distribution of the cavity photons that may be taken as one of their fingerprints. We study this characteristic $N$-photon bundle statistics considering two solid-state cavity quantum electrodynamics (cQED) systems. As one example, we consider a semiconductor quantum-dot--microcavity system coupled to longitudinal acoustic phonons. There, we find the environmental influence to be detrimental to the bundle statistics. The other example is a superconducting qubit inside a microwave resonator. In these systems, pure dephasing is not important and an experimentally feasible parameter regime is found, where the bundle statistics prevails.