中文

Symmetry-Protected Quantum Synchronization in Squeezed-Bath-Engineered Superradiance

量子物理 2026-07-03 v1
作者: Juan David Álvarez-Cuartas , Joakim Bergli , John H. Reina
在 arXiv 上查看 ↗ PDF ↗

摘要

A squeezed dissipative bath converts the coupling phase of a bipartite unconventional Dicke model into a control parameter that suppresses both static superradiant thresholds, opening a window where only a Hopf instability survives and the two spin ensembles synchronize completely via the shared cavity mode. The squeezed bath preserves a Z2\mathbb{Z}_2 parity symmetry, so conventional broken-symmetry diagnostics vanish identically. We certify the synchronized state instead through parity-even, information-theoretic witnesses: a 30\% photon-number suppression, a Husimi-QQ lobe-count change, a 64\% suppression of spin--spin mutual information, and a robust discord-to-mutual-information ratio D/I=0.50±0.05D/I = 0.50 \pm 0.05, confirmed by full quantum master-equation simulations. These results establish parity-even witnesses as a general, entanglement-free route to certifying quantum synchronization in symmetry-protected driven-dissipative systems.

引用

@article{arxiv.2607.03409,
  title  = {Symmetry-Protected Quantum Synchronization in Squeezed-Bath-Engineered Superradiance},
  author = {Juan David Álvarez-Cuartas and Joakim Bergli and John H. Reina},
  journal= {arXiv preprint arXiv:2607.03409},
  year   = {2026}
}