Ground state properties of the one-dimensional Coulomb gas using the lattice regularized diffusion Monte Carlo method
Ground state properties of the one-dimensional Coulomb gas using the lattice regularized diffusion Monte Carlo method
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DOI：
10.1103/physrevb.74.245427
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发表时间：
2006-12-01
影响因子：
3.7
通讯作者：
Senatore, Gaetano
中科院分区：
文献类型：
--
作者：
Casula, Michele;Sorella, Sandro;Senatore, Gaetano
我们研究了准一维电子气通过有效势与谐波横向限制和长程库仑尾相互作用的基态特性。通过使用晶格正则扩散蒙特卡罗方法，可以计算出各种电子密度的精确相关能，该方法是标准投影蒙特卡罗技术的最新发展。在这种情况下，它特别有用，因为它允许人们对系统的精确基态进行采样，即使在电子之间交换极小的低密度状态下也是如此。对于宽度参数 b 的不同值 (0.1 a(0)(*)
We study the ground state properties of a quasi-one-dimensional electron gas interacting via an effective potential with a harmonic transversal confinement and long-range Coulomb tail. The exact correlation energy has been calculated for a wide range of electron densities by using the lattice regularized diffusion Monte Carlo method, which is a recent development of the standard projection Monte Carlo technique. In this case it is particularly useful as it allows one to sample the exact ground state of the system, even in the low-density regime when the exchange between electrons is extremely small. For different values of the width parameter b (0.1 a(0)(*)