Connection between noise and quantum correlations in a double quantum dot

F. Bodoky, W. Belzig, and C. Bruder
Phys. Rev. B 77, 035302 – Published 2 January 2008

Abstract

We investigate the current and noise characteristics of a double quantum dot system. The strong correlations induced by the Coulomb interaction and the Pauli principle create entangled two-electron states and lead to signatures in the transport properties. We show that the interaction parameter ϕ, which measures the admixture of the double-occupancy contribution to the singlet state and thus the degree of entanglement, can be directly accessed through the Fano factor of super-Poissonian shot noise.

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  • Received 25 September 2007

DOI:https://doi.org/10.1103/PhysRevB.77.035302

©2008 American Physical Society

Authors & Affiliations

F. Bodoky

  • Kavli Institute of NanoScience, Delft University of Technology, Lorentzweg 1, 2628 CJ Delft, The Netherlands

W. Belzig

  • Fachbereich Physik, Universität Konstanz, 78457 Konstanz, Germany

C. Bruder

  • Department of Physics, University of Basel, Klingelbergstrasse 82, 4056 Basel, Switzerland

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Issue

Vol. 77, Iss. 3 — 15 January 2008

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