AUTHOR=Zhou Yuan , Cao Lian-Zhen , Wang Qing-Lan , Hu Chang-Sheng , Zhang Zhu-Cheng , Xiong Wei 

TITLE=Phase-dependent strategy to mimic quantum phase transitions

JOURNAL=Frontiers in Quantum Science and Technology

VOLUME=1

YEAR=2023

URL=https://www.frontiersin.org/journals/quantum-science-and-technology/articles/10.3389/frqst.2022.1078597

DOI=10.3389/frqst.2022.1078597

ISSN=2813-2181

ABSTRACT=<p>This study proposes a hybrid quantum system of an ensemble of collective spins coupled to a surface acoustic wave (SAW) cavity through a sideband design. Assisted by a dichromatic optical drive with a phase-dependent control, this spin ensemble can effectively mimic different types of long-range Lipkin–Meshkov–Glick (LMG) interactions and then undergo quantum phase transitions (QPTs) due to phase-induced spontaneous symmetry breaking (SSB). In addition, this phase-controlled scheme also ensures the dynamical preparation of the spin-squeezed state (SSS), which may be a useful application in quantum measurement. This study is a fresh attempt at quantum manipulation based on acoustic control and also provides a promising route toward useful applications in quantum information processing, especially the adiabatic preparation of multiparticle-entangled ground states <italic>via</italic> QPTs; i.e., the Greenberger–Horne–Zeilinger (GHZ) or W-type states.</p>