摘要
运用全量子理论,研究了Tavis-Cummings模型中量子态平均保真度的演化特性,对原子和光场的初态以及两原子的关联程度对平均保真度的影响进行了研究.结果表明,原子、光场和系统的平均保真度依赖于初态时2个原子处在基态的几率以及光场处于真空态的几率;初态两原子在基态无关联,光场处于真空态,体系不失真.
Average fidelities of quantum states in Tavis-Cummings model are studied by means of quantum theory.We consider the strongly coupled atom-field system as a quantum-classical hybrid with dynamically coupled quantum and classical degrees of freedom.The result shows the fidelities become higher with the increasing probability of two atoms initially situated in the ground state and the field in vacuum state.While the two atoms initially situated in ground state behave no-correlation and the field in vacuum state,the quantum state of all systems do not lose fidelities during evolution.
出处
《河北大学学报（自然科学版）》
CAS
北大核心
2012年第1期20-23,共4页
Journal of Hebei University(Natural Science Edition)
基金
国家自然科学基金资助项目(10804076)
