Non-equilibrium dynamics of coupled qubit-cavity arrays

TL;DR

This paper investigates the non-equilibrium behavior of coupled qubit-cavity arrays, revealing how photon blockade and coherent states emerge depending on system size and coupling strength, with implications for quantum simulation.

Contribution

It provides a detailed analysis of the transition from photon blockade to coherent states in coupled cavity arrays under non-equilibrium conditions, highlighting size-dependent effects.

Findings

Photon blockade persists in small systems like dimers.

Extended arrays form coherent states at strong hopping.

Photon behavior depends on system size and coupling strength.

Abstract

We study the coherence and fluorescence properties of the coherently pumped and dissipative Jaynes-Cummings-Hubbard model describing polaritons in a coupled-cavity array. At weak hopping we find strong signatures of photon blockade similar to single-cavity systems. At strong hopping the state of the photons in the array depends on its size. While the photon blockade persists in a dimer consisting of two coupled cavities, a coherent state forms on an extended lattice, which can be described in terms of a semi-classical model.