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Current Noise in ac-Driven Nanoscale Conductors
Sébastien Camalet, Jörg Lehmann, Sigmund Kohler +1
The theory for current fluctuations in ac-driven transport through nanoscale systems is put forward. By use of a generalized, non-Hermitian Floquet theory we derive novel explicit…
Activated escape over oscillating barriers: The case of many dimensions
Jörg Lehmann, Peter Reimann, Peter Hänggi
We present a novel path-integral method for the determination of time-dependent and time-averaged reaction rates in multidimensional, periodically driven escape problems at weak th…
What do phase space methods tell us about disordered quantum systems?
G. -L. Ingold, A. Wobst, C. Aulbach +1
Introduction Phase space methods in quantum mechanics - The Wigner function - The Husimi function - Inverse participation ratio Anderson model in phase space - Husimi functions - I…
Gain in Stochastic Resonance: Precise Numerics versus Linear Response Theory beyond the Two-Mode Approximation
Jesús Casado-Pascual, Claus Denk, José Gómez-Ordóñez +2
In the context of the phenomenon of Stochastic Resonance (SR) we study the correlation function, the signal-to-noise ratio (SNR) and the ratio of output over input SNR, i.e. the ga…
Frequency and Phase Synchronization in Stochastic Systems
Jan A. Freund, Lutz Schimansky-Geier, Peter Haenggi
The phenomenon of frequency and phase synchronization in stochastic systems requires a revision of concepts originally phrased in the context of purely deterministic systems. Vario…
Laser controlled molecular switches and transistors
Jörg Lehmann, Sébastien Camalet, Sigmund Kohler +1
We investigate the possibility of optical current control through single molecules which are weakly coupled to leads. A master equation approach for the transport through a molecul…