Abstract
The symmetry operators generating the hidden symmetry of the asymmetric quantum Rabi model (AQRM) at bias have recently been constructed by Mangazeev et al (2021 J. Phys. A: Math. Theor. 54 12LT01). We start with this result to determine symmetry operators for the N-qubit generalisation of the AQRM, also known as the biased Dicke model, at special biases. We also prove for general N that the symmetry operators, which commute with the Hamiltonian of the biased Dicke model, generate a symmetry.
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More From: Journal of Physics A: Mathematical and Theoretical
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