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arXiv 1408.2269cond-mat.str-elcond-mat.quant-gashep-lat
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用Majorana表象求解量子蒙特卡罗中的费米子符号问题

Solving fermion sign problem in quantum Monte Carlo by Majorana representation

Zi-Xiang Li, Yi-Fan Jiang, Hong Yao

摘要:

本文利用复费米子的Majorana表示,提出了一种新的量子蒙特卡罗方法来求解相互作用费米子模型中的费米子符号问题。我们称之为“马约拉纳QMC”(MQMC)。特别是,MQMC是费米子符号免费模拟一类无自旋费米子模型的二分格在半填充和任意范围内的(无阻挫)的相互作用。据我们所知,MQMC是第一个辅助场QMC方法来解决费米子符号问题的无自旋(更一般地说,奇数物种)费米子模型。MQMC模拟可以在有限温度和零温度下有效地执行。我们相信MQMC可以为解决更一般的费米子模型中的费米子符号问题开辟一条新的途径。

英文摘要:

In this paper, we discover a new quantum Monte Carlo (QMC) method to solve the fermion sign problem in interacting fermion models by employing Majorana representation of complex fermions. We call it "Majorana QMC" (MQMC). Especially, MQMC is fermion sign free in simulating a class of spinless fermion models on bipartite lattices at half filling and with arbitrary range of (unfrustrated) interactions. To the best of our knowledge, MQMC is the first auxiliary field QMC method to solve fermion sign problem in spinless (more generally, odd number of species) fermion models. MQMC simulations can be performed efficiently both at finite and zero temperatures. We believe that MQMC could pave a new avenue to solve fermion sign problem in more generic fermionic models.

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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