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Phys. Rev. Lett. 89, 017901 (2002) [4 pages]

All-Silicon Quantum Computer

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T. D. Ladd *, J. R. Goldman, F. Yamaguchi, and Y. Yamamoto †
Quantum Entanglement Project, ICORP, JST, Edward L. Ginzton Laboratory, Stanford University, Stanford, California 94305-4085

E. Abe and K. M. Itoh ‡
Department of Applied Physics and Physico-Informatics, Keio University, Yokohama 223-8522, Japan

Received 10 September 2001; published 12 June 2002

A solid-state implementation of a quantum computer composed entirely of silicon is proposed. Qubits are 29Si nuclear spins arranged as chains in a 28Si (spin-0) matrix with Larmor frequencies separated by a large magnetic field gradient. No impurity dopants or electrical contacts are needed. Initialization is accomplished by optical pumping, algorithmic cooling, and pseudo-pure state techniques. Magnetic resonance force microscopy is used for ensemble measurement.


©2002 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevLett.89.017901
DOI: 10.1103/PhysRevLett.89.017901
PACS: 03.67.Lx, 07.79.Pk, 76.60.Pc, 81.16.Rf

* Electronic address: tladd@stanford.edu
† Also at NTT Basic Research Laboratories, 3-1 Morinosato-Wakamiya Atsugi, Kanagawa, 243-0198, Japan.
‡ Also at PRESTO-JST.

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