Integrability and Ideal Conductance at Finite Temperatures

Article Article scientifique Article Integrability and Ideal Conductance at Finite Temperatures eng 1995 author Castella Hervé 28233 author Zotos X. author Prelovšek P. 972-975 10.1103/PhysRevLett.74.972 0031-9007 We analyse the finite temperature charge stiffness D(T>0), by a generalization of Kohn's method, for the problem of a particle interacting with a fermionic bath in one dimension. We present analytical evidence, using the Bethe ansatz method, that D(T>0) is finite in the integrable case where the mass of the particle equals the mass of the fermions and numerical evidence that it vanishes in the nonintegrable one of unequal masses. We conjecture that a finite D(T>0) is a generic property of integrable systems. Dewey 500.2 33 Département de physique de la matière quantique 131 false Physical review letters 74 6 bd2325e4-8ef4-4e40-ba17-65c7e44b777c Article (Published version) Public Castella - Integrability and ideal conductance at Finite Temperatures.pdf 1187964 application/pdf openAccess Faculté des sciences / Section de physique / Département de physique de la matière quantique

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Integrability and Ideal Conductance at Finite Temperatures	Physical review letters			1995	574	266

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Castella, Hervé