2004/01/07 by Clive Emary, Tobias Brandes · 1 citation
Physics and Astronomy · #quant-ph #cond-mat.mes-hall
paper · pdf · doi:10.1103/physreva.69.053804
published as Phys. Rev. A 69, 053804 (2004) · 6 pages, 5 figues
arxiv created 2004/01/07 · arxiv updated 2009/12/01
We consider a class of generalised single mode Dicke Hamiltonians with arbitrary boson coupling in the pseudo-spin x-z plane. We find exact solutions in the thermodynamic, large-spin limit as a function of the coupling angle, which allows us to continuously move between the simple dephasing and the original Dicke Hamiltonians. Only in the latter case (orthogonal static and fluctuating couplings), does the parity-symmetry induced quantum phase transition occur.