Spin squeezing in open Heisenberg spin chains
Abstract
Spin squeezing protocols successfully generate entangled many-body quantum states, the key pillars of the second quantum revolution. In our recent work [Phys. Rev. Lett. 129, 090403 (2022)] we showed that spin squeezing described by the one-axis twisting model could be generated in the Heisenberg spin-1/2 chain with periodic boundary conditions when accompanied by a position-dependent spin-flip coupling induced by a single laser field. This work shows analytically that the change of boundary conditions from the periodic to the open ones significantly modifies spin squeezing dynamics. A broad family of twisting models can be simulated by the system in the weak coupling regime, including the one- and two-axis twisting under specific conditions, providing the Heisenberg level of squeezing and acceleration of the dynamics. Full numerical simulations confirm our analytical findings.
Cite
@article{arxiv.2302.09829,
title = {Spin squeezing in open Heisenberg spin chains},
author = {Tanausú Hernández Yanes and Giedrius Žlabys and Marcin Płodzień and Domantas Burba and Mažena Mackoit Sinkevičienė and Emilia Witkowska and Gediminas Juzeliūnas},
journal= {arXiv preprint arXiv:2302.09829},
year = {2023}
}