Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2009-01-05
Phys. Rev. B 79, 174515 (2009)
Physics
Condensed Matter
Strongly Correlated Electrons
8 pages, 6 figures
Scientific paper
We present a study of the hard-core Bose-Hubbard model at zero temperature on an infinite square lattice using the infinite Projected Entangled Pair State algorithm [Jordan et al., Phys. Rev. Lett. 101, 250602 (2008)]. Throughout the whole phase diagram our values for the ground state energy, particle density and condensate fraction accurately reproduce those previously obtained by other methods. We also explore ground state entanglement, compute two-point correlators and conduct a fidelity-based analysis of the phase diagram. Furthermore, for illustrative purposes we simulate the response of the system when a perturbation is suddenly added to the Hamiltonian.
Jordan Jacob
Orus Roman
Vidal Guifre
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