Chapter 21. Quantum Computing Using Electrons Floating on Liquid Helium

  1. Prof. Dr. Samuel L. Braunstein3,
  2. Dr. Hoi-Kwong Lo4 and
  3. Pieter Kok Assistant Editor3
  1. M. I. Dykman1 and
  2. P. M. Platzman2

Published Online: 28 JAN 2005

DOI: 10.1002/3527603182.ch21

Scalable Quantum Computers: Paving the Way to Realization

Scalable Quantum Computers: Paving the Way to Realization

How to Cite

Dykman, M. I. and Platzman, P. M. (2005) Quantum Computing Using Electrons Floating on Liquid Helium, 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.ch21

Editor Information

  1. 3

    University of Wales, Bangor, UK

  2. 4

    MagiQ Technologies, Inc., New York, USA

Author Information

  1. 1

    Michigan State University, Dept. of Physics & Astronomy, East Lansing, MI 48824, USA

  2. 2

    Bell Laboratories, Lucent Technologies, Murray Hill, NJ 07974, USA

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;
  • quantum computing;
  • electrons trapped in vacuum;
  • liquid helium

Summary

The system of electrons trapped in vacuum above the liquid helium surface displays the highest mobilities known in condensed matter physics. We provide a brief summary of the experimental and theoretical results obtained for this system. We then show that a quasi-2D set of N > 108 electrons in vacuum trapped in ID hydrogenic levels above a micron-thick helium film can be used as an easily manipulated strongly interacting set of quantum bits. Individual electrons are laterally confined by micron sized metal pads below the helium. Information is stored in the lowest hydrogenic levels. Using electric fields at temperatures of 10−2 K, changes in the wave function can be made in nanoseconds. Wave function coherence times are .1 millisecond. The wave function is read out using an inverted dc voltage which releases excited electrons from the surface, or using SETs attached to the metal pads which control the electrons.