Loop updates for quantum Monte Carlo simulations in the canonical ensemble.
Loop updates for quantum Monte Carlo simulations in the canonical ensemble.
复制标题
规范系综中量子蒙特卡罗模拟的循环更新。
DOI:
10.1103/physrevlett.96.180603
复制
发表时间:
2005
影响因子:
8.6
通讯作者:
L. Pollet
中科院分区:
文献类型:
--
作者:
S. Rombouts;K. V. Houcke;L. Pollet
We present a new nonlocal updating scheme for quantum Monte Carlo simulations, which conserves particle number and other symmetries. It allows exact symmetry projection and direct evaluation of the equal-time Green's function and other observables in the canonical ensemble. The method is applicable to a wide variety of systems. We show results for bosonic atoms in optical lattices, neutron pairs in atomic nuclei, and electron pairs in ultrasmall superconducting grains.