Dissipation and noise in adiabatic quantum pumps

Article

关键词: ONE-DIMENSIONAL CHANNEL;    ELECTRON PUMP;    SCATTERING-THEORY;    ACOUSTOELECTRIC CURRENT;    MESOSCOPIC CONDUCTORS;    TRANSPORT;    MICROSTRUCTURES;    FLUCTUATIONS;    DOTS;   

DOI  :  10.1103/PhysRevB.66.035306

来源: SCIE

【 摘 要 】

We investigate the distribution function, the heat flow, and the noise properties of an adiabatic quantum pump for an arbitrary relation of pump frequency omega and temperature. To achieve this we start with the scattering matrix approach for ac transport. This approach leads to expressions for the quantities of interest in terms of the sidebands of particles exiting the pump. The sidebands correspond to particles which have gained or lost a modulation quantum (h) over bar omega. We find that our results for the pump current, the heat flow, and the noise can all be expressed in terms of a parametric emissivity matrix. In particular we find that the current cross correlations of a multiterminal pump are directly related to a nondiagonal element of the parametric emissivity matrix. The approach allows a description of the quantum statistical correlation properties (noise) of an adiabatic quantum pump.

【 授权许可】

Free