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arXiv · 2110.02837

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

Jia-Qiang Chen·Yi-Fan Qiao·Xing-Liang Dong·Xin-Lei Hei·Peng-Bo Li
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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.

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Jia-Qiang Chen, Yi-Fan Qiao, Xing-Liang Dong, Xin-Lei Hei, Peng-Bo Li. 2021-10-06. Dissipation-assisted preparation of steady spin-squeezed states of SiV centers. https://doi.org/10.1103/physreva.103.013709

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