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Proceedings Paper

Qubit-qubit interaction in quantum computers: errors and scaling laws
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Paper Abstract

This paper explores the limitations that interaction between the physical qubits making up a quantum computer may impose on the computer's performance. For computers using atoms as qubits, magnetic dipole-dipole interactions are likely to be dominant; various types of errors which they might introduce are considered here. The strength of the interaction may be reduce by increasing the distance between qubits, which in general will make the computer slower. For ion-chain based quantum computers the slowing down due to this effect is found to be generally more sever than that due to other causes. In particular, this effect alone would be enough to make these systems unacceptably slow for large-scale computation, whether they use the center of mass motion as the 'bus' or whether they do this via an optical cavity mode.

Paper Details

Date Published: 6 July 1998
PDF: 8 pages
Proc. SPIE 3385, Photonic Quantum Computing II, (6 July 1998); doi: 10.1117/12.312633
Show Author Affiliations
Julio R. Gea-Banacloche, Univ. of Arkansas (United States)

Published in SPIE Proceedings Vol. 3385:
Photonic Quantum Computing II
Steven P. Hotaling; Andrew R. Pirich, Editor(s)

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