Measurement of quantum noise in a carbon nanotube quantum dot in the Kondo regime

J. Basset, A. Yu Kasumov, C. P. Moca, G. Zaránd, P. Simon, H. Bouchiat, R. Deblock

Research output: Article

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Abstract

The current emission noise of a carbon nanotube quantum dot in the Kondo regime is measured at frequencies ν of the order or higher than the frequency associated with the Kondo effect k BT K/h, with T K 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 hνk BT K a Kondo effect related singularity at a voltage bias eVhν, and a strong reduction of this singularity for hν3k BT K, 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.

Original languageEnglish
Article number046802
JournalPhysical review letters
Volume108
Issue number4
DOIs
Publication statusPublished - jan. 24 2012

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Basset, J., Kasumov, A. Y., Moca, C. P., Zaránd, G., Simon, P., Bouchiat, H., & Deblock, R. (2012). Measurement of quantum noise in a carbon nanotube quantum dot in the Kondo regime. Physical review letters, 108(4), [046802]. https://doi.org/10.1103/PhysRevLett.108.046802