Charge fluctuations in single-electron tunneling oscillations

Article

关键词: COULOMB-BLOCKADE;    JOSEPHSON-JUNCTIONS;    QUANTUM FLUCTUATIONS;    BLOCH OSCILLATIONS;    ENVIRONMENT;    DENSITY;    ARRAYS;    NOISE;   

DOI  :  10.1103/PhysRevB.85.115416

来源: SCIE

【 摘 要 】

It has been predicted that in the presence of a sufficiently high dissipative environment transport in a small tunnel junction can become extremely regular, giving rise to the phenomenon of single-electron tunneling oscillations. Recent progress in detection of high-frequency current fluctuations and the interest in single-electron sources motivate further investigations on the expected accuracy of the charge oscillations as a function of the impedance of the environment. In this paper we study theoretically the charge-fluctuation spectrum at finite frequency for the system at hand, and investigate its behavior as a function of the external impedance. The evolution and the disappearance of the single-electron oscillations peak is described by analytical and numerical methods.

【 授权许可】

Free