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Measuring the entanglement between double quantum dot charge qubits

Source: Phys. Rev. B 80, 161309(R) (2009); doi:10.1103/PhysRevB.80.161309

Published 22 October 2009

KEYWORDS and PACS
Keywords
PACS
  • 73.23.Hk
    Coulomb blockade; single-electron tunneling
  • 73.50.Td
    Noise processes and phenomena in thin film electronic transport
  • 73.63.Kv
    Quantum dots (electronic transport)
  • 03.67.Mn
    Entanglement measures, witnesses, and other characterizations (quantum information)
  • YEAR: 2009
PUBLICATION DATA
Publisher:
AIP is a member of CrossRef APS
Clive Emary
Institut für Theoretische Physik, Hardenbergstr. 36, TU Berlin, D-10623 Berlin, Germany
We present a scheme for creating and measuring entanglement between two double quantum dot charge qubits in a transport setup in which voltage pulses can modify system parameters. Detection of entanglement is performed via the construction of a Bell inequality with current correlation measurements. An essential feature is the use of the internal dynamics of the qubits as the constituent electrons tunnel into the leads to give the single-particle rotations necessary for the Bell measurement. ©2009 The American Physical Society
History: Received 30 September 2009; published 22 October 2009
Permalink: http://link.aps.org/abstract/PRB/v80/e161309
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