Test of the low-energy model for one-dimensional interacting Fermi systems

Journal article

Bosonization predicts that the specific heat C(T) of a one-dimensional interacting Fermi system is a sum of the specific heats of free collective charge and spin excitations, plus the term with the running backscattering amplitude which flows to zero logarithmically with decreasing T. We verify whether this result is reproduced in the g -ology model. Of specific interest are the anomalous terms in C(T) that depend on the bare backscattering amplitude. We show that these terms can be incorporated into a renormalized spin velocity. We do this by proving the equivalence of the results for C(T) obtained within the g -ology model and by bosonization with velocities obtained by the numerical solution of the Bethe-ansatz equations for the Hubbard model. © 2008 The American Physical Society.

Authors: Chubukov, A; Maslov, D; Essler, F

• Publication status: Published
• Journal: Physical Review B
• Volume: 77
• Issue: 16
• Publication date: 2008-04-01
• DOI: 10.1103/PhysRevB.77.161102
• EISSN: 1550-235X
• ISSN: 1098-0121
• Language: English