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arXiv 2409.11571cond-mat.str-elcond-mat.quant-gas
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Hartree-Fock-Bogoliubov波函数流形中的蒙特卡洛方法

Monte Carlo Methods in the Manifold of Hartree-Fock-Bogoliubov Wave Functions

Ettore Vitali, Peter Rosenberg, Shiwei Zhang

AI总结:

本文研究在Hartree-Fock-Bogoliubov波函数流形中实现随机游走,以扩展约束路径辅助场量子蒙特卡洛方法至FFLO和三重态配对等复杂超导体系。

摘要:

我们探索在Hartree-Fock-Bogoliubov波函数流形中实现随机游走的可能性。目标是将最先进的量子蒙特卡洛方法,特别是约束路径辅助场量子蒙特卡洛技术,扩展到可能存在有限配对序参量或复杂配对机制的系统,例如Fulde-Ferrell-Larkin-Ovchinnikov(FFLO)配对或三重态配对。利用定义适合物理问题的真空态所具有的灵活性,我们讨论了一种利用Hartree-Fock-Bogoliubov态的虚时间演化来计算基态关联的方法,将其扩展到当前形式体系所涵盖情形之外。文中给出了说明性示例。

英文摘要:

We explore the possibility to implement random walks in the manifold of Hartree-Fock-Bogoliubov wave functions. The goal is to extend state-of-the-art quantum Monte Carlo approaches, in particular the constrained-path auxiliary-field quantum Monte Carlo technique, to systems where finite pairing order parameters or complex pairing mechanisms, e.g., Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) pairing or triplet pairing, may be expected. Leveraging the flexibility to define a vacuum state tailored to the physical problem, we discuss a method to use imaginary-time evolution of Hartree-Fock-Bogoliubov states to compute ground state correlations, extending beyond situations spanned by current formalisms. Illustrative examples are provided.

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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