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arXiv 0912.4271cond-mat.stat-mechhep-latquant-ph
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固定能量下的量子蒙特卡罗方法

A Quantum Monte Carlo Method at Fixed Energy

Edward Farhi, Jeffrey Goldstone, David Gosset, Harvey B. Meyer

摘要:

本文利用量子蒙特卡罗模拟研究量子统计力学的零温度极限。我们发展了一种量子蒙特卡罗方法,其中固定的基态能量作为一个参数。我们考虑的哈密顿量是具有基态能量E的$H=H_{0}+λV$形式。对于固定的$H_{0}$和V,可以将E看作是$λ$的函数,而我们将$λ$看作是E的函数。我们固定E,并定义一个路径积分量子蒙特卡罗方法,其中的路径不参考的时间(离散或连续),在状态之间发生的过渡。对于固定的E,我们可以确定H的$λ(E)$和其他基态性质。

英文摘要:

In this paper we explore new ways to study the zero temperature limit of quantum statistical mechanics using Quantum Monte Carlo simulations. We develop a Quantum Monte Carlo method in which one fixes the ground state energy as a parameter. The Hamiltonians we consider are of the form $H=H_{0}+λV$ with ground state energy E. For fixed $H_{0}$ and V, one can view E as a function of $λ$ whereas we view $λ$ as a function of E. We fix E and define a path integral Quantum Monte Carlo method in which a path makes no reference to the times (discrete or continuous) at which transitions occur between states. For fixed E we can determine $λ(E)$ and other ground state properties of H.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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