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Anyonic Phase Transitions in the 1D Extended Hubbard Model with Fractional Statistics
Martin Bonkhoff1,2, Kevin Jägering1, Shijie Hu1,3
1University of Kaiserslautern-Landau, Physics Department and Research Center OPTIMAS, 67663 Kaiserslautern, Germany.
Abstract:
We study one-dimensional lattice anyons with extended Hubbard interactions at unit filling using bosonization and numerical simulations. The behavior can be continuously tuned from bosonic to fermionic statistics by adjusting the topological exchange angle θ, which leads to a competition of different instabilities. We present the bosonization theory in the presence of dynamic gauge fields, which predicts a phase diagram of four different gapped phases with distinct dominant correlations. Advanced numerical simulations determine and analyze the exact phase transitions between Mott insulator, charge density wave, dimerized state, and Haldane insulator, all of which meet at a multicritical line in the parameter space of anyonic angle θ, on-site interaction U, and nearest neighbor repulsion V. Superfluid and pair-superfluid phases are stable in a region of small V.
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