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From integrability to conductance, impurity systems

Castro-Alvaredo, O. and Fring, A. (2003). From integrability to conductance, impurity systems. Nuclear Physics B, 649(3), pp. 449-490. doi: 10.1016/S0550-3213(02)01029-5


We compute the DC conductance with two different methods, which both exploit the integrability of the theories under consideration. On one hand we determine the conductance through a defect by means of the thermodynamic Bethe ansatz and standard relativistic potential scattering theory based on a Landauer transport theory picture. On the other hand we propose a Kubo formula for a defect system and evaluate the current–current two-point correlation function it involves with the help of a form factor expansion. For a variety of defects in a fermionic system we find excellent agreement between the two different theoretical descriptions.

Publication Type: Article
Subjects: Q Science > QC Physics
Departments: School of Mathematics, Computer Science & Engineering > Mathematics
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