Abstract
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 , is computed. reaches very low values () 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 () at the shuttling threshold, consistent with predictions based on phase-space representations of the density matrix.
- Received 24 February 2004
DOI:https://doi.org/10.1103/PhysRevLett.92.248302
©2004 American Physical Society