Rashba相互作用下二维电子气的量子Monte Carlo研究
Quantum Monte Carlo study of the two-dimensional electron gas in presence of Rashba interaction
摘要：
我们介绍了一个变种的扩散蒙特卡罗算法，可用于研究的Rashba相互作用在许多电子系统的影响。由于Rashba相互作用的自旋-轨道性质，标准算法不能应用，因此，在核物理框架内开发的先前工作之后，已经开发并实现了特定的虚时间自旋相关传播子。我们计算了不同密度下二维电子气的基态能量，并给出了Rashba相互作用强度随“Rashba自旋态”极化的变化。与分析已知的Hartree-Fock结果和库仑相互作用的情况下，系统的比较。
英文摘要：
We introduce a variant to the Diffusion Monte Carlo algorithm that can be employed to study the effects of the Rashba interaction in a many electron systems. Because of the spin--orbit nature of Rashba interaction a standard algorithm cannot be applied and therefore a specific imaginary time spin dependent propagator has been developed and implemented following previous work developed in the framework of nuclear physics. We computed the ground state energy of the 2D electron gas at different densities for several values of the Rashba interaction strength as a function of "Rashba spin states" polarization. Comparison is given with analytically known Hartree-Fock results and for the system in absence of Coulomb interaction.
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