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The Dicke model as the contraction limit of a pseudo-deformed Richardson-Gaudin model

The Dicke model is derived in the contraction limit of a pseudo-deformation of the quasispin algebra in the su(2)-based Richardson-Gaudin models. Likewise, the integrability of the Dicke model is established by constructing the full set of conserved charges, the form of the Bethe Ansatz state, and the associated Richardson-Gaudin equations. Thanks to the formulation in terms of the pseudo-deformation, the connection from the su(2)-based Richardson-Gaudin model towards the Dicke model can be performed adiabatically.

preprint2014arXivOpen access
Pieter W. ClaeysStijn De BaerdemackerMario Van RaemdonckDimitri Van Neck
math-phmath.MPquant-ph
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Pieter W. ClaeysStijn De BaerdemackerMario Van RaemdonckDimitri Van Neck

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