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Paper detail

Quantum phase transitions of three-level atoms interacting with a one-mode electromagnetic field

We apply the energy surface method to study a system of Na three-level atoms interacting with a one-mode radiation field in the Ξ, Λand V configurations. We obtain an estimation of the ground-state energy, the expectation value of the total number of excitations, and the separatrix of the model in the interaction parameter space, and compare the results with the exact solutions. We have first and second-order phase transitions, except for the V configuration which only presents second-order phase-transitions.

preprint2013arXivOpen access
Sergio CorderoRamón López-PeñaOctavio CastañosEduardo Nahmad-Achar
quant-ph
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Sergio CorderoRamón López-PeñaOctavio CastañosEduardo Nahmad-Achar

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