Parity-symmetry-breaking quantum phase transition via parametric drive in a cavity magnonic system

• URL: http://arxiv.org/abs/2105.08371v3
• Date: Fri, 13 Aug 2021 02:43:37 GMT
• Title: Parity-symmetry-breaking quantum phase transition via parametric drive in a cavity magnonic system
• Authors: Guo-Qiang Zhang, Zhen Chen, Wei Xiong, Chi-Hang Lam, and J. Q. You
• Abstract summary: We study the parity-symmetry-breaking quantum phase transition (QPT) in a cavity magnonic system driven by a parametric field. 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.
• Score: 6.881569041306451
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• 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.

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