Abstract
The current emission noise of a carbon nanotube quantum dot in the Kondo regime is measured at frequencies of the order or higher than the frequency associated with the Kondo effect , with the Kondo temperature. The carbon nanotube is coupled via an on-chip resonant circuit to a quantum noise detector, a superconductor-insulator-superconductor junction. We find for a Kondo effect related singularity at a voltage bias , and a strong reduction of this singularity for , in good agreement with theory. Our experiment constitutes a new original tool for the investigation of the nonequilibrium dynamics of many-body phenomena in nanoscale devices.
- Received 6 October 2011
DOI:https://doi.org/10.1103/PhysRevLett.108.046802
© 2012 American Physical Society