Solution to sign problems in half-filled spin-polarized electronic systems

Article

关键词: MONTE-CARLO CALCULATIONS;    LATTICE FERMIONS;    SIMULATION;   

DOI  :  10.1103/PhysRevB.89.111101

来源: SCIE

【 摘 要 】

We solve the sign problem in a particle-hole symmetric spin-polarized fermion model on bipartite lattices using the idea of fermion bags. The solution can be extended to a class of models at half filling but without particle-hole symmetry. Attractive Hubbard models with an odd number of fermion species can also be solved. Our solutions should allow us to study quantum phase transitions that have remained unexplored so far due to sign problems.

【 授权许可】

Free