Dissipation-assisted preparation of steady spin-squeezed states of SiV centers

TL;DR

This paper presents a method to generate steady spin-squeezed states in a SiV center ensemble coupled to a damped nanomechanical resonator, leveraging dissipation to achieve quantum states useful for quantum technologies.

Contribution

It introduces a dissipative scheme for preparing steady spin-squeezed states in a spin-mechanical system, with potential applications in quantum information and metrology.

Findings

Deterministic preparation of spin-squeezed states via dissipation.

Optimal spin squeezing up to 4/N in ideal conditions.

Existence of a collective steady state combining spin and mechanical modes.

Abstract

We propose an efficient scheme for generating spin-squeezed states at steady state in a spin-mechanical hybrid system, where an ensemble of SiV centers are coupled to a strongly damped nanomechanical resonator. We show that,there exists a collective steady state in the system, which is exactly formed by the collective spin states plus the zero excitation state of the mechanical mode. The generation of the steady spin-squeezed state is based on a dissipative quantum dynamical process in which the mechanical dissipation plays a positive role but without destroying the target state. We demonstrate that the spin-squeezed steady state can be deterministically prepared via dissipative means, with the optimal spin squeezing up to 4/N in the ideal case, where N is the number of spins. This work provides a promising platform for quantum information processing and quantum metrology.