Flavor-twisted boundary condition for simulations of quantum many-body systems

Details Flavor-twisted boundary condition for simulations of quantum many-body systems Flavor-twisted boundary condition for simulations of quantum many-body systems

2009-10-08

arxiv.org/abs/0910.1574v1

Phys. Rev. B 80, 180402(R) (2009).

Physics

Condensed Matter

Strongly Correlated Electrons

6 pages, 2 figures

Scientific paper

10.1103/PhysRevB.80.180402

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.

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