# Collective Multi-Photon Blockade In Cavity Quantum Electrodynamics

## TL;DR

This paper investigates collective multi-photon blockade phenomena in a cavity QED system with two strongly coupled atoms, revealing conditions for simultaneous two- and three-photon anti-bunching and their dependence on atomic positioning and system parameters.

## Contribution

It demonstrates the possibility of observing simultaneous multi-photon blockades and explores how asymmetries and atomic configurations influence these quantum effects, advancing understanding of collective quantum behaviors.

## Key findings

- Simultaneous two- and three-photon blockade observed.
- Blockades depend on atomic positions and coupling asymmetries.
- System predicts new quantum statistical features.

## Abstract

We present a study of collective multi-photon blockade in coherently driven atoms in a single mode cavity. Considering two atoms strongly coupled to an optical cavity, we show that the two-photon blockade with two-photon anti-bunching, and the three-photon blockade with three-photon anti-bunching can be observed simultaneously. The three-photon blockade probes both dressed states in the two photon and three photon spaces. The two photon and three photon blockades strongly depend on the location of two atoms in the strong coupling regime. The asymmetry in the atom-cavity coupling constants opens new pathways for multiphoton blockade which is also shown to be sensitive to the atomic decay and pumping strengths. The work presented here predicts many new quantum statistical features due to the collective behavior of atoms and can be useful to generate non-classical photon pairs.