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2018

Resolution of Gauge Ambiguities in Ultrastrong-Coupling Cavity QED

Di Stefano, O., Settineri, A., Macrì, V. et al.

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Gauge invariance is the cornerstone of modern quantum field theory.

Recently, it has been shown that the quantum Rabi model, describing the dipolar coupling between a two-level atom and a quantized electromagnetic field, violates this principle.
This widely used model describes a plethora of quantum systems and physical processes under different interaction regimes.
In the ultrastrong coupling regime, it provides predictions which drastically depend on the chosen gauge.

Resolution of Gauge Ambiguities in Ultrastrong-Coupling Cavity QED · Around

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