Spin squeezing in nitrogen vacancy center quantum systems with non-Markovian thermal environment

Abstract

As a fundamental technology in quantum information science, spin squeezing possesses immeasurable value in enhancing measurement sensitivity, facilitating the generation of quantum entanglement, accelerating the development of quantum technology applications, and deepening the understanding of quantum mechanics. This paper investigates the generation of spin squeezing in nitrogen-vacancy waveguide systems within non-Markovian thermal environments. We derive a non-Markovian master equation that characterizes this system and conduct numerical simulations to illustrate the effects of memory parameters and the number of spin particles on generating maximum squeezing. Our study provides insights into spin-integrated magnetic measurements and the application of spin qubits in phonon-mediated quantum information processing.