Chapter 13. Spintronics and Quantum Dots for Quantum Computing and Quantum Communication

  1. Prof. Dr. Samuel L. Braunstein2,
  2. Dr. Hoi-Kwong Lo3 and
  3. Pieter Kok Assistant Editor2
  1. Guido Burkard,
  2. Hans–Andreas Engel and
  3. Daniel Loss

Published Online: 28 JAN 2005

DOI: 10.1002/3527603182.ch13

Scalable Quantum Computers: Paving the Way to Realization

Scalable Quantum Computers: Paving the Way to Realization

How to Cite

Burkard, G., Engel, H. and Loss, D. (2000) Spintronics and Quantum Dots for Quantum Computing and Quantum Communication, in Scalable Quantum Computers: Paving the Way to Realization (eds S. L. Braunstein, H.-K. Lo and P. Kok), Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim, FRG. doi: 10.1002/3527603182.ch13

Editor Information

  1. 2

    University of Wales, Bangor, UK

  2. 3

    MagiQ Technologies, Inc., New York, USA

Author Information

  1. Department of Physics and Astronomy, University of Basel, Klingelbergstrasse 82, CH-4056 Basel, Switzerland

Publication History

  1. Published Online: 28 JAN 2005
  2. Published Print: 20 DEC 2000

ISBN Information

Print ISBN: 9783527403219

Online ISBN: 9783527603183

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Keywords:

  • quantum computation;
  • spintronics;
  • quantum dots;
  • quantum computing;
  • quantum communication

Summary

Control over electron-spin states, such as coherent manipulation, filtering and measurement promises access to new technologies in conventional as well as in quantum computation and quantum communication. We review our proposal of using electron spins in quantum confined structures as qubits and discuss the requirements for implementing a quantum computer. We describe several realizations of one- and two-qubit gates and of the read-in and read-out tasks. We discuss recently proposed schemes for using a single quantum dot as spin-filter and spin-memory device. Considering electronic EPR pairs needed for quantum communication we show that their spin entanglement can be detected in mesoscopic transport measurements using metallic as well as superconducting leads attached to the dots.