• Corpus ID: 166227987

Uniqueness of the phase transition in many-dipole systems

@article{Stokes2019UniquenessOT,
  title={Uniqueness of the phase transition in many-dipole systems},
  author={Adam Oliver Stokes and Ahsan Nazir},
  journal={arXiv: Quantum Physics},
  year={2019}
}
Due to various no-go and counter no-go results, the existence and natures of thermodynamic phases of light-matter systems continue to be disputed. We show using an arbitrary-gauge approach that a unique phase transition does occur in many-dipole cavity QED systems, and manifests unambiguously via a macroscopic gauge-invariant polarisation. Whether the abnormal phase appears superradiant depends on the gauge, because the gauge controls the extent to which the polarisation is included as part of… 
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