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理论物理通讯:英文版

Exact Analytical Solutions in Bose-Einstein Condensates with Time-Dependent Atomic Scattering Length

Chen, Yong, Li, Biao, Zheng Zheng, Yu Yu

Published Jan 1, 2007• 1 citation
OpenAlex

Abstract

在纸,概括 Riccati 方程合理扩大方法被介绍。使用方法和符号的计算,我们在场 Bose 的准确分析答案的三个家庭—有时间依赖者的爱因斯坦冷凝物内部在一个逐出的抛物线的潜力的原子相互作用。然后,二个 anlytical 解决方案的动力学被计算机模拟包括管理 Feshbach 的非线性的系数和夸张正割函数系数在一些可选的参数下面表明。

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Dark and bright solitons in a Bose–Einstein condensate with a Feshbach resonance

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Both dark and bright solitons are constructed exactly for a Bose–Einstein condensation with a time-dependent scattering length in an expulsive parabolic potential. It is shown analytically how the size of the cloud and the sharp peak of the condensate changes via the Feshbach resonance. It is also found that the atom loss due to three-body recombination can be controlled with the help of Feshbach resonance. The exact calculation is performed to compare the rate of the atom loss between the system with time-dependent scattering length in an expulsive parabolic potential and the system with constant scattering length.

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Wang, Tian-Yuan

我们与在一个复杂潜力散布长度的时间依赖者认为描述鲍斯·爱因斯坦的动力学的一个维的非线性的 Schrodinger 方程是冷凝物。我们的结果证明只要 integrable 关系满足,一个维的非线性的 Schrodinger 方程的准确答案能在一种一般关上的形式被发现,并且在二 solitons 之间的相互作用在一个复杂潜力被调制。我们发现散布长度和套住的潜力的变化能有效地被用来控制在二明亮的 soliton 之间的相互作用。

理论物理通讯:英文版•Jan 1, 2009•1 citation
在纸,概括 Riccati 方程合理扩大方法被介绍。使用方法和符号的计算,我们在场 Bose 的准确分析答案的三个家庭—有时间依赖者的爱因斯坦冷凝物内部在一个逐出的抛物线的潜力的原子相互作用。然后,二个 anlytical 解决方案的动力学被计算机模拟包括管理 Feshbach 的非线性的系数和夸张正割函数系数在一些可选的参数下面表明。
In the paper, the generalized Riccati equation rational expansion method is presented. Making use of the method and symbolic computation, we present three families of exact analytical solutions of Bose–Einstein condensates with the time-dependent interatomic interaction in an expulsive parabolic potential. Then the dynamics of two anlytical solutions are demonstrated by computer simulations under some selectable parameters including the Feshbach-managed nonlinear coefficient and the hyperbolic secant function coefficient.
Both dark and bright solitons are constructed exactly for a Bose–Einstein condensation with a time-dependent scattering length in an expulsive parabolic potential. It is shown analytically how the size of the cloud and the sharp peak of the condensate changes via the Feshbach resonance. It is also found that the atom loss due to three-body recombination can be controlled with the help of Feshbach resonance. The exact calculation is performed to compare the rate of the atom loss between the system with time-dependent scattering length in an expulsive parabolic potential and the system with constant scattering length.
我们与在一个复杂潜力散布长度的时间依赖者认为描述鲍斯·爱因斯坦的动力学的一个维的非线性的 Schrodinger 方程是冷凝物。我们的结果证明只要 integrable 关系满足,一个维的非线性的 Schrodinger 方程的准确答案能在一种一般关上的形式被发现,并且在二 solitons 之间的相互作用在一个复杂潜力被调制。我们发现散布长度和套住的潜力的变化能有效地被用来控制在二明亮的 soliton 之间的相互作用。