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The fidelities of the system surge periodically from 0 to 1 for the etceteras Bell state at original time when average photon number of two-mode entangled coherent states cavity fields are very small.

对于好腔,若原子初始时刻处于相干保持态,系统保真度呈指数单调衰减;若原子初始时刻处于其余Bell态之一,系统保真度呈指数振荡衰减,且随着腔场初态的平均光子数的增加,系统保真度的振荡频率增大,振幅减小。

The fidelities of quantum states of system in Jaynes-Cammings model considering the dissipation of cavity were studied by using the complete quantum theory.The influences of the cavity damping constant and the numerical value of initial mean photon number on the fidelities of quantum states was discussed.

利用全量子理论研究了存在腔耗散的大失谐 Jaynes-Cumming 模型中量子态保真度,讨论了初始平均光子数一定的情况下腔的耗散系数对量子态保真度的影响,以及当腔的耗散一定的情况下初始光场的平均光子数对量子态保真度的影响。

Results show that the less the Stark shift is, which will weaken the interaction between the field and atom, and the higher the fidelities of the three systems are.

结果表明,斯塔克常数越小,原子和光场的关联就越弱,系统、光场和原子的保真度就越大;平均光子数越大,原子和光场的相互作用就越强,系统和原子的保真度就越小。

We investigate time evolution of the fidelities for an interacting system between a cascade three level atom and a binomial state field.

本文研究了二项式态光场与级联三能级厚子相互作用系统中原子,光场和整个系统的量子信息保真度的时间演化规律,讨论了光场参数和失谐量对量子信息保真度的影响。

The fidelities of quantum states of system in Jaynes Cummings model containing atomic motion under action of coherent field are studied. The influence of atomic motion and the field mode structure on the fidelities of quantum states of system in different atomic initial states is discussed.

研究了相干光场作用下的含原子运动的Jaynes Cummings模型中体系量子态保真度,讨论了不同的原子初态条件下,原子的运动和场模结构对体系中的量子态保真度的影响。

The fidelities of the atom, the field and the system are higher than those in the absence of the dynamic Stark shift when manipulating and communicating quantum information.

初始场强调制了原子、场和系统保真度演化的量子崩塌复苏周期,使场保真度演化中的振荡脉冲变窄。

In this paper, we discuss fidelities and fidelity amplitudes for some models including single-mode field interacting with atom system, two-mode field interacting with atom system, field interacting with atom by multiphoton process system and binomial field interacting with atom system and find some meaning result.

文章中具体研究了单模光场与原子相互作用系统、双模光场与原子相互系统、多光子过程与原子相互作用系统以及二项式光场与原子相互作用系统的保真度的演化特性,以及部分模型的保真度振幅的演化特性,并得出了许多有意义的结果。

On the other hand, we introduce fidelity amplitude that weighs the stand or fall of quantum information transmission result. The high fidelity and the low fidelity amplitude is, the better capability of information transition is. In this paper, pure quantum theory method was mainly applied to study fidelity evolution problem of some typical models of quantum optics, researches on fidelities of the interacting systems between field and atom have been studied deeply.

本文运用纯量子理论,研究了一些典型有意义的量子光学模型保真度演化规律,对光场与原子相互作用的保真度演化特性作了较深入的研究,并引入描述量子信息传输性能好坏的另一个物理量保真度振幅,保真度越高,保真度振幅越小,系统的保真性能越好。

On the other hand, the more the initial photons are, which strengthen the interaction between the field and atom, and the lower the fidelities of the system and atom.

标 签 量子光学保真度保真度振幅简并拉曼过程斯塔克位移 fidelity fidelity amplitude degenerate Raman process the Stark shift

Increasing the light intensity will decrease fidelity, and increasing detuning can improve fidelity.

增强光强使保真度下降,失谐量的增加使保真度上升。

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