Coupling n-level Atoms with l-modes of Quantised Light in a Resonator

Quantum Fest 2015

Castaños, O.^1 ; Cordero, S.^1 ; Nahmad-Achar, E.^1 ; López-Peña, R.^1

Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, Apartado Postal 70-543, México DF

04510, Mexico^1

关键词: Coherent state;    Dicke model;    L-modes;    Quantum phase diagrams;    Quantum phase transitions;    Radiation field;    Tensorial products;    Test functions;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/698/1/012006/pdf
DOI  :  10.1088/1742-6596/698/1/012006

来源: IOP

【 摘 要 】

We study the quantum phase transitions associated to the Hamiltonian of a system of n-level atoms interacting with l modes of electromagnetic radiation in a resonator. The quantum phase diagrams are determined in analytic form by means of a variational procedure where the test function is constructed in terms of a tensorial product of coherent states describing the matter and the radiation field. We demonstrate that the system can be reduced to a set of Dicke models.