Noise-induced quantum synchronization of spin chain with periodic boundary

TL;DR

This paper investigates how local Gaussian white noise influences quantum synchronization in a spin chain with periodic boundary conditions, revealing conditions for synchronization and the persistence of entanglement despite decoherence.

Contribution

It introduces a detailed analysis of noise-induced quantum synchronization in many-body spin systems, including criteria for synchronization and the impact of system parameters.

Findings

Synchronization conditions depend on noise acting on individual spins or pairs.

Synchronization degree is quantified by Pearson correlation coefficient.

Entanglement persists despite noise-induced decoherence.

Abstract

Quantum synchronization offers new possibilities for the exploration of collective dynamics in many-body systems. However, achieving synchronization in many-body quantum systems still faces numerous challenges. Here, we focus on the synchronization behavior of quantum spin chain with periodic boundary conditions under the influence of local Gaussian white noise. The necessary conditions for synchronization of local spin observables when noise acts on individual spin and two spins are obtained. The degree of synchronization between the expectation values of the local spin observables is characterized by utilizing the Pearson correlation coefficient, while the frequency of oscillation is determined through the application of fast Fourier transformation. We also discuss qualitatively the effect of system parameters on synchronization time. Despite the presence of noise leading to decoherence in the system, entanglement between synchronous and antisynchronous spins still persists. Our results provide valuable insights toward the realization of quantum synchronization in many-body quantum systems.