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Quantum router based on ac control of qubit chains

Source: Phys. Rev. A 80, 042303 (2009); doi:10.1103/PhysRevA.80.042303

Published 2 October 2009

KEYWORDS and PACS
Keywords
PACS
  • 03.67.Bg
    Entanglement production and manipulation (quantum information)
  • 75.10.Pq
    Spin chain models (magnetism)
  • YEAR: 2009
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PUBLICATION DATA
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David Zueco,1 Fernando Galve,1 Sigmund Kohler,2 and Peter Hänggi1
1Institut für Physik, Universität Augsburg, Universitätsstraße 1, D-86135 Augsburg, Germany
2Instituto de Ciencia de Materiales de Madrid, CSIC, Cantoblanco, E-28049 Madrid, Spain
We study the routing of quantum information in qubit chains. This task is achieved by suitably chosen time-dependent local fields acting on the qubits. Employing the physics of coherent destruction of tunneling, we demonstrate that a driving-induced renormalization of the coupling between neighboring qubits provides the key for controlling the transduction of quantum information between permanently coupled qubits. We employ this idea for building a quantum router. Moreover, we discuss the experimental implementation with Penning traps and study the robustness of our protocol under realistic experimental conditions, such as fabrication uncertainties and decoherence. ©2009 The American Physical Society
History: Received 28 May 2009; published 2 October 2009
Permalink: http://link.aps.org/abstract/PRA/v80/e042303

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