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Spintronics, Quantum Computing, and Quantum Communication in Quantum Dots

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Fundamentals of Quantum Information

Part of the book series: Lecture Notes in Physics ((LNP,volume 587))

Abstract

The coherent manipulation, filtering, and measurement of the electron spin in solid-state nanostructures has potential applications for both conventional and quantum computation as well as for quantum communication. This article is intended as a review of our proposal to use electron spins in quantum confined structures as quantum bits (qubits). The physical requirements for implementing a quantum computer, including single- and two-qubit gate operations, phase coherence, initialization, and read-out, will be discussed. In addition, we also present recently proposed schemes for using a single quantum dot as spin-filter and spin-memory device. In the context of spintronics, it is quite natural to consider spin-entangled electron pairs as a basic resource for quantum communication; we show that the entanglement of such EPR pairs can be detected in mesoscopic transport measurements using metallic as well as superconducting leads attached to the dots.

The present article contains the basic material of the lectures given by D. Loss at the 13th Chris Engelbrecht Summer School, Stellenbosch, South Africa, 24 January to 2 February 2001.

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Authors
  1. Guido Burkard
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  2. Hans-Andreas Engel
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  3. Daniel Loss
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Editors and Affiliations

  1. Department of Physics, University of Stellenbosch, 7602, Matieland, South Africa

    Dieter Heiss

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Burkard, G., Engel, HA., Loss, D. (2002). Spintronics, Quantum Computing, and Quantum Communication in Quantum Dots. In: Heiss, D. (eds) Fundamentals of Quantum Information. Lecture Notes in Physics, vol 587. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-45933-2_7

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  • DOI: https://doi.org/10.1007/3-540-45933-2_7

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