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Instituto de Ciencia de Materiales de Madrid |
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| Condensed Matter Theory | |||||
| Sigmund Kohler | home | cv | research | publications | ||||
Shot-noise control in ac-driven nanoscale conductorsSébastien Camalet, Sigmund Kohler, and Peter HänggiPhys. Rev. B 70, 155326 (2004) We derive within a time-dependent scattering formalism expressions for both the current through ac-driven nanoscale conductors and its fluctuations. The results for the time-dependent current, its time average, and, above all, the driven shot noise properties assume an explicit and serviceable form by relating the propagator to a non-Hermitian Floquet theory. The results are valid for a driving of arbitrary strength and frequency. The connection with commonly known approximation schemes such as the Tien-Gordon approach or a high-frequency approximation is elucidated together with a discussion of the corresponding validity regimes. Within this formalism, we study the coherent suppression of current and noise caused by properly chosen electromagnetic fields. arXiv:cond-mat/0402182 |
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last modified: 18.11.2024 by
Sigmund Kohler