Enhanced electromechanical coupling of a nanomechanical resonator to coupled superconducting cavities

TL;DR

This paper demonstrates that coupling a nanomechanical resonator to two coupled superconducting cavities driven by a squeezed microwave source can significantly enhance electromechanical interactions, enabling strong single-photon coupling and quantum state generation.

Contribution

It introduces a method to greatly enhance electromechanical coupling via selective interaction with cavity Bogoliubov modes, reaching the single-photon strong coupling regime.

Findings

Enhanced electromechanical coupling by several orders of magnitude.

Achieved conditions for single-photon strong coupling.

Potential to observe photon blockade and generate nonclassical states.

Abstract

We investigate the electromechanical coupling between a nanomechanical resonator and two parametrically coupled superconducting coplanar waveguide cavities that are driven by a two-mode squeezed microwave source. We show that, with the selective coupling of the resonator to the cavity Bogoliubov modes, the radiation-pressure type coupling can be greatly enhanced by several orders of magnitude, enabling the single photon strong coupling to be reached. This allows the investigation of a number of interesting phenomena such as photon blockade effects and the generation of nonclassical quantum states with electromechanical systems.