Flavor-twisted boundary condition for simulations of quantum many-body systems
arXiv:0910.1574 · doi:10.1103/PhysRevB.80.180402
Abstract
We present an approximative simulation method for quantum many-body systems based on coarse graining the space of the momentum transferred between interacting particles, which leads to effective Hamiltonians of reduced size with the flavor-twisted boundary condition. A rapid, accurate, and fast convergent computation of the ground-state energy is demonstrated on the spin-1/2 quantum antiferromagnet of any dimension by employing only two sites. The method is expected to be useful for future simulations and quick estimates on other strongly correlated systems.
arXiv comment6 pages, 2 figures
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