Universidad Complutense de Madrid
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A measure of conductivity for lattice fermions at finite density



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Alonso, J. L. y Fernández Pérez, Luis Antonio y Martín Mayor, Víctor (2000) A measure of conductivity for lattice fermions at finite density. Physics letters B, 480 (3-4). pp. 392-398. ISSN 0370-2693

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URL Oficial: http://doi.org/10.1016/S0370-2693(00)00398-1

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We study the linear response to an external electric field of a system of fermions in a lattice at zero temperature. This allows to measure numerically the Euclidean conductivity which turns out to be compatible with an analytical calculation for free fermions. The numerical method is generalizable to systems with dynamical interactions where no analytical approach is possible.

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© 2000 Elsevier Science B.V. This work was triggered during a discussion with F. Guinea to whom we are indebted for many suggestions, discussions and bibliographical help. The numerical calculations have being carried-out in the RTNN machines at the universities of Zaragoza and Complutense de Madrid. This work has been partially supported by CICYT, contracts AEN97- 1680,1693,1708.

Palabras clave:Gross-Neveu model; Chiral-symmetry restoration; Temperature.
Materias:Ciencias > Física
Ciencias > Física > Física-Modelos matemáticos
Código ID:40448
Depositado:19 Dic 2016 08:13
Última Modificación:19 Dic 2016 08:13

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