All-optical quantum simulation of ultrastrong optomechanics

TL;DR

This paper proposes an all-optical simulation method for ultrastrong optomechanical coupling using a Fredkin-type interaction, enabling exploration of quantum effects and measurement transitions in cavity optomechanics.

Contribution

It introduces a novel all-optical scheme leveraging a Fredkin-type interaction and displacement amplification to simulate ultrastrong optomechanical coupling.

Findings

Achieved single-photon strong and ultrastrong coupling regimes in simulations.

Demonstrated creation of macroscopic quantum superpositions.

Showed a weak-to-strong quantum measurement transition.

Abstract

The observation of single-photon optomechanical effects is a desired task in cavity optomechanics. However, the realization of ultrastrong optomechanical interaction remains a big challenge. Here, we present an all-optical scheme to simulate ultrastrong optomechanical coupling based on a Fredkin-type interaction, which consists of two exchange-coupled modes with the coupling strength depending on the photon number in another controller mode. This coupling enhancement is assisted by the displacement amplification according to the physical idea of the Bogoliubov approximation, which is realized by utilizing a strong driving to pump one of the two exchanging modes. Our numerical simulations demonstrate that the enhanced optomechanical coupling can enter the single-photon strong-coupling and even ultrastrong-coupling regimes. We also show the creation of macroscopic quantum superposed states and the implementation of a weak-to-strong transition for quantum measurement in this system. This work will pave the way to quantum simulation of single-photon optomechanical effects with current experimental platforms.