Fidelity of quantum state for interacting system of atomic bose-einstein condensate and single-mode light field

作者：Li Ming^*

来源：Journal of the University of Electronic Science and Technology of China, 2014, 43(4): 542-546.

DOI：10.3969/j.issn.1001-0548.2014.04.012

• Atomic Bose-Einstein condensate
• Bose-Einstein condensates
• Circular frequency
• Fidelity
• Hamiltonian operators
• Interacting system
• Single-mode light
• Two-level atom

The Hamiltonian operator of a system of two-level atomic Bose-Einstein condensate interacting with single-mode squeezed coherent light field is improved in terms of the lattice-liquid model. The influence on the fidelity of quantum state of the system from the average photon number of the initial light field, the interaction intensity between light field and atoms, and the circular frequency of the light field is studied. The results show that the fidelity of the system presents a collapse-revert phenomenon. The smaller average photon number of the initial light field, the better the fidelity of the system;the interaction intensity between light field and atoms and the circular frequency of the light field have no obvious influence on the fidelity of the system.

• 出版日期2014
• 单位桂林理工大学