Simulating Quantum Fields with Cavity QED

TL;DR

This paper proposes a variational quantum simulation method using cavity QED systems to emulate strongly interacting quantum fields, potentially surpassing classical simulation capabilities.

Contribution

It introduces a broadly applicable scheme leveraging cavity QED physics for simulating complex quantum fields, including strongly interacting bosons.

Findings

Existing cavity devices can simulate strongly interacting boson models.

The method is adaptable to various architectures with nonlinear light interactions.

It extends to entangled multicomponent fields beyond classical simulation limits.

Abstract

As the realization of a fully operational quantum computer remains distant, quantum simulation, whereby one quantum system is engineered to simulate another, becomes a key goal of great practical importance. Here we report on a variational method exploiting the natural physics of cavity QED architectures to simulate strongly interacting quantum fields. Our scheme is broadly applicable to any architecture involving tunable and strongly nonlinear interactions with light; as an example, we demonstrate that existing cavity devices could simulate models of strongly interacting bosons. The scheme can be extended to simulate systems of entangled multicomponent fields, beyond the reach of existing classical simulation methods.