| Tavis-Cummings模型中的量子态平均保真度 |
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| 引用本文： | 张彦立,李同锴,史严.Tavis-Cummings模型中的量子态平均保真度[J].河北大学学报(自然科学版),2012(1):20-23. |
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| 作者姓名： | 张彦立 李同锴 史严 |
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| 作者单位： | 石家庄铁道大学数理系 |
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| 基金项目： | 国家自然科学基金资助项目(10804076) |
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| 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.
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| 关 键 词： | 平均保真度 Tavis-Cummings模型 量子态 |
Average fidelity of quantum states in Tavis-Cummings model |
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| ZHANG Yan-li,LI Tong-kai,SHI Yan.Average fidelity of quantum states in Tavis-Cummings model[J].Journal of Hebei University (Natural Science Edition),2012(1):20-23. |
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| Authors: | ZHANG Yan-li LI Tong-kai SHI Yan |
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| Institution: | (Department of Mathmatics and Physics,Shijiazhuang Tiedao University,Shijiazhuang 050043,China) |
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| Abstract: | 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. |
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| Keywords: | average fidelity Tavis-Cummings model quantum state |
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