Parity-symmetry-breaking quantum phase transition via parametric drive in a cavity magnonic system
Abstract
We study the parity-symmetry-breaking quantum phase transition (QPT) in a cavity magnonic system driven by a parametric field, where the magnons in a ferrimagnetic yttrium-iron-garnet sphere strongly couple to a microwave cavity. With appropriate parameters, this cavity magnonic system can exhibit a rich phase diagram, including the parity-symmetric phase, parity-symmetry-broken phase, and bistable phase. When increasing the drive strength beyond a critical threshold, the cavity magnonic system undergoes either a first- or second-order nonequilibrium QPT from the parity-symmetric phase with microscopic excitations to the parity-symmetry-broken phase with macroscopic excitations, depending on the parameters of the system. Our work provides an alternate way to engineer the QPT in a hybrid quantum system containing the spin ensemble in a ferri- or ferromagnetic material with strong exchange interactions.
Keywords
Cite
@article{arxiv.2105.08371,
title = {Parity-symmetry-breaking quantum phase transition via parametric drive in a cavity magnonic system},
author = {Guo-Qiang Zhang and Zhen Chen and Wei Xiong and Chi-Hang Lam and J. Q. You},
journal= {arXiv preprint arXiv:2105.08371},
year = {2021}
}
Comments
9 pages, 5 figures