Engineering Many-Body Dynamics with Quantum Light Potentials and Measurements

TL;DR

This paper explores how quantum light potentials and measurements can be used to engineer and control complex many-body atomic dynamics in optical lattices, enabling novel quantum simulation capabilities.

Contribution

It introduces a framework combining light-induced long-range interactions with measurement backaction to tailor atomic dynamics in optical lattices.

Findings

Demonstrates tunable long-range density interactions

Shows correlated atomic tunnelling and superexchange

Provides a framework for enhanced quantum simulations

Abstract

Interactions between many-body atomic systems in optical lattices and light in cavities induce long-range and correlated atomic dynamics beyond the standard Bose-Hubbard model, due to the global nature of the light modes. We characterise these processes, and show that uniting such phenomena with dynamical constraints enforced by the backaction resultant from strong light measurement leads to a synergy that enables the atomic dynamics to be tailored, based on the particular optical geometry, exploiting the additional structure imparted by the quantum light field. This leads to a range of tunable effects such as long-range density-density interactions, perfectly correlated atomic tunnelling, superexchange, and effective pair processes. We further show that this provides a framework for enhancing quantum simulations to include such long-range and correlated processes, including reservoir models and dynamical global gauge fields.