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含类Kerr介质的双光子Jaynes-Cummings模型中的反聚束效应 总被引:3,自引:0,他引:3
研究了一个两能级原子处于充满了类Kerr介质的高Q腔里与单模辐射场双光子相互作用的系统中,光场的反聚束效应,着重讨论了原子处于不同初始条件下类Kerr介质与单模场作用的耦合强度和失谐量对光场反聚束效应的影响。 相似文献
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类克尔媒质中多光子J—C模型场的反聚束效应 总被引:2,自引:2,他引:2
使用类克尔(Kerr)媒质中多光子J-C模型的有效哈密顿,求解赢余该系统的波函数,并研究类克尔媒质与腔场的非线性相互作用对场模的反聚束效应的影响。 相似文献
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原子空间分布对光子反聚束效应的影响 总被引:3,自引:0,他引:3
在Raman-Nath近似下,我们讨论了二能级原子波包与腔内驻波场的相互作用,数值积分结果表明,原子的波包宽度对光子反聚束效应有重要影响,波包宽度的增加易使光场表现为反聚束效应。 相似文献
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强场作用下二能级原子双光子过程中的光子聚束与反聚束效应 总被引:6,自引:3,他引:3
本文采用数值计算方法研究了强场作用下二能级原子双光子过程中的光子聚束与反聚束效应.结果表明:辐射光子主要表现为反聚束性质,且随着n值的不断增大,场与原子的非线性耦合越来越强,重复地出现复苏收缩现象和短时的光子聚束效应. 相似文献
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本文利用友格-库塔法对多个方程组连续进行积分,提出了一种处理依赖于时间的Janes-Cummings模型,描述二能级原子与腔场相互作用的耦合系数依赖于时间的JCM的哈密顿量为H=1/2ω0σ3+ω^+a^+a^+g(t)(σ+a+σ-a)h=1(1)这里,g(t)选择为时间上的一个脉冲g(t)=g0exp(-(t-t0)^2/2a^2),其中t0和a分别为脉冲中心和脉冲宽度,g0是一有量纲常数, 相似文献
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Completely solving the dissipative dynamics of nonlinear Jaynes-Cumming model is a very difficult task.In our recent work (Phys. Lett. A284 (2001) 156), we just obtained analytical results of the field dissipative dynamics of the nonlinear JCM. In the present paper, employing the perturbative expansion of master equation, we obtain the density operator of the system (field +atom). The coherence losses of the system and of the atom are investigated when two-photon process is involved. We also study the effect of different atomic initial states and the influence of the field amplitude on the atomic coherence loss. 相似文献
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研究了斯塔克(Stark)效应对两模双光子Jaynes-Cummings(J-C)模型腔场谱的影响,推导计算出了腔场处于光子数态时腔场谱的计算公式和数值结果,讨论了斯塔克效应和初始场强对腔场谱的影响。发现斯塔克效应在弱场条件下对腔场谱线的频率和强度都有明显的影响,破坏了谱结构的对称性,使两模的谱线更加丰富。初始场较强时斯塔克效应对谱线的影响较弱。模Ⅰ为真空场、模Ⅱ初始场强递增时,斯塔克效应使模Ⅱ的高频峰受到较强的抑制作用,其低频峰在初始场较弱时受到抑制,初始场较强时又有强化作用,初始场更强时,模Ⅱ的谱线退化为经典的共振荧光谱,与无斯塔克效应的情况基本相同。 相似文献
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利用多光子J-C模型,考虑场频率随时间以正弦函数形式作小量变化,在旋波近似下,研究了二能级原子通过多光子跃迁与单模辐射场相互作用系统中场的反聚束效应.利用数值计算方法给出反映场反聚束效应的二阶关联函数随时间的演化曲线.研究结果表明:场二阶关联函数的演化受场频率随时间正弦函数形式变化的调制,场频率振荡的幅值 u越大调制作用越强,在场频率振荡的幅值u大于一定值后,场二阶关联函数随时间的演化呈现出周期性振荡特性,其振荡周期与场频率变化的周期一致. 相似文献
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In this paper, we find an analytic solution of the master equation of a non-resonant two-photon JaynesCummings model (JCM) with phase damping with the help of the super-operator technique. We study the influence of phase damping on non-classical effects in the JCM, such as oscillations of the photon-number distribution, revivals of the atomic inversion, and sub-Possion photon statistics. It is demonstrated that the phase damping suppresses the revivals of the atomic inversion and non-classical effects of the cavity field in the JCM. 相似文献
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不同激光脉冲对J-C模型中的反聚束效应的影响 总被引:1,自引:2,他引:1
选取三种不同的激光脉冲形式,研究了依赖于时间的J-C模型中的反聚束效应.并对三种不同脉冲形式下所得的结果进行比较. 相似文献
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Ge Yu Zhao-Xian Yu Zhi-Yong Jiao Bing-Hao Xie Shuo Jin 《International Journal of Theoretical Physics》2008,47(9):2279-2284
By using the Lewis–Riesenfeld invariant theory, we have studied the dynamical and the geometric phases in a two energy level
Jaynes-Cummings model with imaginary photon process. We find that the geometric phases in a cycle case have nothing to do
with the frequency of the photon field, the coupling coefficient between photons and atoms, and the atom transition frequency.
If we use the more accuracy device, the geometric phases in the imaginary photon process may be observed, and the geometric
phases in this process have the observable physical effect. 相似文献
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Sunil Kumar 《Pramana》1985,25(3):291-309
The theory of the coherent, two-photon resonant interaction of a monochromatic field with N atoms is given. It is seen that
the dynamics of the atom-field system can be completely determined when the field is “strong”. Two specific examples are given:
(i) two-photon absorption by atoms in ground state, and (ii) stimulated two-photon emission by fully excited atoms, assuming
a coherent field in both cases. In case (ii), the field shows photon-antibunching after the decay of half of the atoms. The
merits of our approach are shown by comparing with other treatments. Our results can also be applied to certain degenerate
four-wave mixing processes which are described by a similar Hamiltonian. 相似文献