PELLEGRINI, Franco; NEGRI, Carlotta; PISTOLESI, Fabio; MANINI, Nicola; SANTORO, Giuseppe E.; TOSATTI, Erio

doi:10.1103/PhysRevLett.107.060401

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PELLEGRINI, Franco
Scuola Internazionale Superiore di Studi Avanzati / International School for Advanced Studies [SISSA / ISAS]

NEGRI, Carlotta
Laboratoire Ondes et Matière d'Aquitaine [LOMA]

PISTOLESI, Fabio
Laboratoire Ondes et Matière d'Aquitaine [LOMA]
Laboratoire de physique et modélisation des milieux condensés [LPM2C]

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Physical Review Letters. 2011-08-01, vol. 107, n° 06, p. 06401 (1-5)

American Physical Society

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Quantum pumping, in its different forms, is attracting attention from different fields, from fundamental quantum mechanics, to nanotechnology, to superconductivity. We investigate the crossover of quantum pumping from the adiabatic to the anti-adiabatic regime in the presence of dissipation, and find general and explicit analytical expressions for the pumped current in a minimal model describing a system with the topology of a ring forced by a periodic modulation of frequency omega. The solution allows following in a transparent way the evolution of pumped DC current from much smaller to much larger omega values than the other relevant energy scale, the energy splitting introduced by the modulation. We find and characterize a temperature-dependent optimal value of the frequency for which the pumped current is maximal.< Leer menos

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Crossover from adiabatic to antiadiabatic quantum pumping with dissipation

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