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Shot Noise of Cotunneling Current

Burkard, Guido
Loss, Daniel
Published in Nazarov Y. V. Quantum Noise in Mesoscopic Physics. Berlin, Heidelberg: Springer Netherlands. 2003, p. 149-172
Collection NATO Science Series II: Mathematics, Physics and Chemistry; 97
Abstract We study the noise of the cotunneling current through one or several tunnel-coupled quantum dots in the Coulomb blockade regime. The various regimes of weak and strong, elastic and inelastic cotunneling are analyzed for quantum-dot systems (QDS) with few-level, nearly-degenerate, and continuous electronic spectra. In the case of weak cotunneling we prove a non-equilibrium fluctuation-dissipation theorem which leads to a universal expression for the noise-to-current ratio (Fano factor). The noise of strong inelastic cotunneling can be super-Poissonian due to switching between QDS states carrying currents of different strengths. The transport through a double-dot (DD) system shows an Aharonov-Bohm effect both in noise and current. In the case of cotunneling through a QDS with a continuous energy spectrum the Fano factor is very close to one
Keywords Quantum PhysicsCondensed Matter PhysicsElectrical Engineering
ISBN: 978-1-4020-1240-2
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SUKHORUKOV, Eugene, BURKARD, Guido, LOSS, Daniel. Shot Noise of Cotunneling Current. In: Nazarov Y. V. (Ed.). Quantum Noise in Mesoscopic Physics. Berlin, Heidelberg : Springer Netherlands, 2003. p. 149-172. (NATO Science Series II: Mathematics, Physics and Chemistry; 97) doi: 10.1007/978-94-010-0089-5_8 https://archive-ouverte.unige.ch/unige:36365

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Deposited on : 2014-05-06

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