Spin squeezing: Thermal behavior and distribution on excited states
Abstract
We investigate the spin-squeezing behavior under thermal effects in a one-dimensional transverse field XY model with spin-1/2. The exact solution of the model helps us to compute the spin-squeezing parameter as a function of temperature and also in all excited states with higher energy than the ground state. We find that below the thermal factorized field, h_f(T_{co}), there is no transition temperature. At the thermal factorized field, a transition from a thermal squeezed state to an unsqueezed state occurs at a specific temperature called the coherent temperature. Interestingly, we show that the finite temperature can create squeezed states from a state which at zero temperature is a coherent state. To complete our study, we also analyze the variation of the spin-squeezing parameter in the excited states and provide a behavioral analysis of the thermal spin-squeezing parameter.
Cite
@article{arxiv.2412.04564,
title = {Spin squeezing: Thermal behavior and distribution on excited states},
author = {Saeed Mahdavifar and Hadi Cheraghi and Kourosh Afrousheh},
journal= {arXiv preprint arXiv:2412.04564},
year = {2024}
}