Finite-size bosonization and self-consistent harmonic approximation

2004/08/11 by C. Mocanu, C Mocanu, M. Dzierzawa +5
Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #Physics of Superconductivity and Magnetism #Quantum Mechanics and Non-Hermitian Physics #cond-mat.str-el

paper · pdf · doi:10.1088/0953-8984/16/36/010

published as J. Phys.: Condens. Matter 16 (2004) 6445-6451

arxiv created 2004/08/11 · openalex publication_date 2004/08/28 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/30

Abstract

The self-consistent harmonic approximation is extended in order to account for the existence of Klein factors in bosonized Hamiltonians. This is important for the study of finite systems where Klein factors cannot be ignored a priori . As a test we apply the method to interacting spinless fermions with modulated hopping. We calculate the finite-size corrections to the energy gap and the Drude weight and compare our results with the exact solution for special values of the model parameters.

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