Preparing ground states and squeezed states of nanomechanical cantilevers by fast dissipation

TL;DR

This paper introduces a protocol for cooling nanomechanical cantilevers to their ground states and generating squeezed states using a flux qubit with microwave driving, leveraging fast dissipation to enhance state preparation.

Contribution

It presents a novel scheme that utilizes flux qubit dissipation to efficiently prepare ground and squeezed states of nanomechanical cantilevers.

Findings

Nanomechanical modes can be cooled to ground states.

Single-mode squeezed vacuum states can be generated.

Qubit decay facilitates state preparation.

Abstract

We propose a protocol that enables strong coupling between a flux qubit and the quantized motion of a magnetized nanomechanical cantilever. The flux qubit is driven by microwave fields with suitable parameters to induce sidebands, which will lead to the desired coupling. We show that the nanomechanical modes can be cooled to the ground states and the single-mode squeezed vacuum states can be generated via fast dissipation of the flux qubit. In our scheme, the qubit decay plays a positive role and can help drive the system to the target states.