共查询到20条相似文献,搜索用时 453 毫秒
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利用小扰动方法对非线性演化方程作展开得到原始方程的各级近似方程.应用Jacobi椭圆函 数展开法求得了零级近似方程的准确解,并由此得到一级近似方程和二级近似方程分别满足 齐次Lam方程和非齐次Lam方程,应用Lam函数和Jacobi椭圆函数展开法可以分别求得一级近似方程和二级近似方程的准确解.这样,就求得了非线性演化方程的多级准确解.
关键词:
Jacobi椭圆函数
Lam函数
多级准确解
非线性演化方程
扰动方法 相似文献
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本文对碱金属原子引入势能函数Vr)=后解薛定谔方程求得其能量表式,解释了碱金属原子光谱的实验规律.在此基础上,将经典相对论的质量修正相应引入碱金属原子的哈密顿算符中,用近似方法求出其能量的相对论修正的一级近似.这是用量子力学方法讨论碱金属原子的一种简略方法,也是一种粗略的近似. 相似文献
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由于两自由度带电耦合振子系统的Lagrange函数中存在耦合项,从而导致其运动微分方程是非线性耦合的.先通过坐标变换消去Lagrange函数中的耦合项,用直接积分法求得系统的守恒量,用Adomian分解法求得系统的近似解,再通过坐标反变换求得系统在原坐标下的守恒量与近似解,并对近似解作了讨论. 相似文献
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S_2分子的从头算研究 总被引:1,自引:1,他引:0
采用了微机版的Gaussian94程序以及CIS方法和CIS-MP2方法对S2分子的部分单重激发态和三重激发态进行了研究。计算表明:CIS方法和CIS-MP2方法对S2分子的2低单重激发态基本适用,可以给出较为满意的结果。但对S2分子的三重激发态和高激发态,CIS方法还需进上步改进。 相似文献
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Photon statistical properties of the cavity field in the two-atom Jaynes-Cummings model 总被引:1,自引:1,他引:0
The model that two two-level atoms interact with a singel-mode cavity is studied. The exact solution of the time evolution operator for the two-atom Jaynes-Cummings model is presented by the bare-states approach. Furthermore, we investigate the dynamical 相似文献
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采用了微机版的Gaussian 94程序以及CIS方法和CIS MP2方法对S2 分子的部分单重激发态和三重激发态进行了研究。计算表明 :CIS方法和CIS MP2方法对S2 分子的低单重激发态基本适用 ,可以给出较为满意的结果。但对S2 分子的三重激发态和高激发态 ,CIS方法还需进一步改进。 相似文献
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We adopt an algebraic method to study the two-mode two-photon Jaynes-Cummings model governed by the Milburn equation and find an exact solution of Milburn equation of the system.The influence of the intrinsic decoherence on the nonclassical effects of the system is also discussed. 相似文献
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Cenap Özel Erol Yılmaz Hünkar Kayhan Aliekber Aktağ 《International Journal of Theoretical Physics》2008,47(12):3101-3107
In this paper, the entanglement properties of a system of two atoms inside an optical cavity in a stochastic interaction with
field are studied by the Jaynes-Cummings Model. The phase telegraph noise is considered as a noise term and an exact solution
to the model is obtained. The solution reveals the resulting decoherence effects of the noise on the entanglement properties
of the system. It shows that under the noise the individual atoms do not entangle with the cavity field. However, a strong
atom-atom entanglement is observed in a stationary state. It is seen that a relatively strong noise is cooperative in the
construction of the steady state atom-atom entanglement. 相似文献
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HIGHER-ORDER CORRECTION FOR ROTATING WAVE APPROXIMATION, RABI TRANSFORMATION, AND ITS APPLICATIONS IN THE JAYNES-CUMMINGS MODEL 下载免费PDF全文
Taking into account the consistence of the quantum adiabatic approximation and the rotating wave approximation in essence, we propose a method to study the interaction between atom and radiation field in a quantized cavity systematically. By using the exact solution of Jaynes-Cummings model as the lowest-order approximation, the effect of high frequency terms on the dynamics of atom-cavity field system is studied analytically. 相似文献
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Effect of Intrinsic Decoherence on Nonclassical Effects of the Nondegenerate Bimodal Multiquanta JCM
H. A. Hessian 《International Journal of Theoretical Physics》2002,41(7):1397-1422
We study the nondegenerate multiquanta Jaynes-Cummings model governed by Milburn equation. This models the decoherence of a quantum system as it evolves through intrinsic mechanisms beyond conventional quantum mechanics governed by the Schrödinger equation. We find an exact solution of this equation and apply it to investigate the effects of the intrinsic decoherence on nonclassical effects of the system, such as collapses and revivals of the population inversion and squeezing of the radiation field, for the resonant and the off-resonant cases when the particle (atom or trapped ion) is taken to be prepared initially in a coherent superposition state. 相似文献
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In the present article, we introduce a Hamiltonian model that consists of two modes of the field in a perfect cavity to interact with a single two-level atom. The interaction between the fields has been taken into account and considered to be in the parametric amplifier form. The model in one hand can be regarded as a generalization of the Jaynes-Cummings model (JCM), however, in the other hand it can be considered as a generalization of the parametric amplifier model. Under a certain condition the exact solution to the Schrödinger equation is obtained. Employing this solution and for chosen values of different parameters we discuss numerically the atomic occupation probabilities as well as the degree of entanglement through the entropy of the field. The system shows superstructure phenomenon similar to that appeared from the effect of the Kerr-like medium on the Jaynes-Cummings model. The von Neumann entropy and phase distribution for both two-mode correlated and uncorrelated coherent states cases are also considered. 相似文献
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H. Kayhan 《The European Physical Journal D - Atomic, Molecular, Optical and Plasma Physics》2008,48(3):443-449
The entanglement dynamics in a system of the
interaction of an atom with a single-mode thermal field in the
presence of noise is studied by the Jaynes-Cummings model.
Two-state random phase telegraph noise is considered as the noise
in the interaction and an exact solution to the model under this
noise is obtained by the Burshtein equation. Although the
Burshtein equation is applicable for laser-atom interactions, it
is shown that it can be applied to atom-thermal field system as a
special case. The solution is used to investigate the entanglement
dynamics of the atom-field interaction by calculating a lower
bound on concurrence. It is found that the entanglement is a non
monotonic function of the intensity of the noise. The degree of
the entanglement decreases to a minimum value for an optimal
intensity of the noise and then increases for a sufficiently large
intensity. Moreover, intense noise may generate stronger
entanglement compared with the absence of noise. 相似文献