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This document summarizes a study that used high-order series expansions to investigate the hard core boson model on the triangular lattice at zero temperature. The expansions probed the spatially ordered "solid" phase and the transition to a uniform superfluid phase. At a commensurate filling of n=2/3, the study located a quantum phase transition point at (t/V)c ≈ 0.208, in agreement with Monte Carlo studies. At half-filling (n=1/2), evidence was found for a solid phase that persists to t/V ≃ 0.06.

Author

Mremef

Language

EN