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Gauge non-invariance due to material truncation in ultrastrong-coupling quantum electrodynamics

Matters Arising to this article was published on 22 December 2023

The Original Article was published on 03 June 2019

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Fig. 1: Transition spectra as a function of coupling strength.


  1. De Bernardis, D., Pilar, P., Jaako, T., De Liberato, S. & Rabl, P. Breakdown of gauge invariance in ultrastrong-coupling cavity QED. Phys. Rev. A 98, 053819 (2018).

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This work was supported by the UK Engineering and Physical Sciences Research Council, grant no. EP/N008154/1.

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Correspondence to Adam Stokes or Ahsan Nazir.

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Stokes, A., Nazir, A. Gauge non-invariance due to material truncation in ultrastrong-coupling quantum electrodynamics. Nat. Phys. 20, 376–378 (2024).

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