Abstract
We employ a non-linear sigma model defined on a Keldysh contour to study the current and the current noise in a diffusive micro-bridge in the presence of electron-electron interactions. Out of equilibrium the fluctuation-dissipation theorem (FDT) does not apply, hence these two quantities are not simply interrelated. For a two-dimensional electron gas (2DEG) we obtain logarithmic singularities in the low frequency limit. PACS Nos. 71.10.Ay, 71.23.An, 73.50.Td
Original language | American English |
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Title of host publication | Proceedings of les Rencontres de Moriond on Electronic Correlations: from meso to nano-physics |
Editors | Martin T, Montambaux G, Tran Thanh Van J |
Place of Publication | Les Arcs, France |
Publisher | EDP Sciences |
State | Published - 2000 |