Shot noise of a quantum shuttle.
We formulate a theory for shot noise in quantum nanoelectromechanical systems. As a specific example, the theory is applied to a quantum shuttle, and the zero-frequency noise, measured by the Fano factor F, is computed. F reaches very low values (F approximately 10(-2)) in the shuttling regime even in the quantum limit, confirming that shuttling is universally a low noise phenomenon. In approaching the semiclassical limit, the Fano factor shows a giant enhancement (F approximately 10(2)) at the shuttling threshold, consistent with predictions based on phase-space representations of the density matrix.
Novotný
Tomás
T
MIC-Department of Micro and Nanotechnology, Technical University of Denmark, DTU-Building 345 East, DK-2800 Kongens Lyngby, Denmark. tno@mic.dtu.dk
Donarini
Andrea
A
Flindt
Christian
C
Jauho
Antti-Pekka
AP