Digitized Quantum Rabi Model at the Strong Coupling Regime

Abstract

The Quantum Rabi model is a crucial theoretical framework for understanding the interplay between light and matter. This paper focuses on a transformative digital quantum simulation that utilizes Trotterization with an increased number of steps to analyze a complex unitary Hamiltonian. This method demonstrates the advantages of digital techniques in capturing the dynamic behaviors of Quantum Rabi models in the deep strong coupling regime. Moreover, this proposal highlights the universality, flexibility, and scalability of digital methods, particularly in coherent measurements during time evolution with varying photon counts.