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Stereographic projections path integral in S-1 and (S-2)(m) manifolds

机译:S-1和(S-2)(m)流形中的立体投影路径积分

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摘要

The importance sampling technique for stochastic integration is extended to evaluate imaginary time path integral expressions in two kinds of spacelike curved manifolds that arise frequently in the physics of constrained molecular motion. Using stereographic projection maps, we develop convenient quantum distributions. We explore the issue of energy estimation based on the extension of the virial theorem in curved manifolds and we provide simple numerical criteria to determine if the virial of a system in a curved space approaches the kinetic energy as a stochastic estimator. Simple numerical tests are carried out using both the discretized and the Fourier path integral approaches. The particle in a ring subjected to two different potentials is insightful and is sufficiently simple to simulate by other well established methods. (C) 2003 American Institute of Physics. [References: 47]
机译:扩展了用于随机积分的重要性采样技术,以评估在受约束的分子运动物理学中经常出现的两种空间状弯曲流形中的虚假时间路径积分表达式。使用立体投影图,我们可以开发方便的量子分布。我们探讨了基于弧形流形上的维里定理的扩展的能量估计问题,并提供了简单的数值标准来确定系统中的维里尔是否作为随机估计量接近动能。使用离散和傅立叶路径积分方法都可以进行简单的数值测试。处于两个不同电势的环中的粒子具有洞察力,并且足够简单,可以通过其他完善的方法进行模拟。 (C)2003美国物理研究所。 [参考:47]

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