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Proceedings Paper • Open Access

Quantum computers and decoherence: exorcising the demon from the machine
Author(s): Daniel A. Lidar; Lian-Ao Wu

Paper Abstract

Decoherence is the main obstacle to the realization of quantum computers. Until recently it was thought that quantum error correcting codes are the only complete solution to the decoherence problem. Here we present an alternative that is based on a combination of a decoherence-free subspace encoding and the application of strong and fast pulses: "encoded recoupling and decoupling" (ERD). This alternative has the advantage of lower encoding overhead (as few as two physical qubits per logical qubit suffice), and direct application to a number of promising proposals for the experimental realization of quantum computers.

Paper Details

Date Published: 8 May 2003
PDF: 15 pages
Proc. SPIE 5115, Noise and Information in Nanoelectronics, Sensors, and Standards, (8 May 2003); doi: 10.1117/12.488754
Show Author Affiliations
Daniel A. Lidar, Univ. of Toronto (Canada)
Lian-Ao Wu, Univ. of Toronto (Canada)

Published in SPIE Proceedings Vol. 5115:
Noise and Information in Nanoelectronics, Sensors, and Standards
Laszlo B. Kish; Frederick Green; Giuseppe Iannaccone; John R. Vig, Editor(s)

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