Quantum computers and decoherence: exorcising the demon from the machine

Daniel A. Lidar; Lian-Ao Wu

doi:10.1117/12.488754

8 May 2003 Quantum computers and decoherence: exorcising the demon from the machine

Daniel A. Lidar, Lian-Ao Wu

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Proceedings Volume 5115, Noise and Information in Nanoelectronics, Sensors, and Standards; (2003) https://doi.org/10.1117/12.488754
Event: SPIE's First International Symposium on Fluctuations and Noise, 2003, Santa Fe, New Mexico, United States

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.

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Daniel A. Lidar and Lian-Ao Wu "Quantum computers and decoherence: exorcising the demon from the machine", Proc. SPIE 5115, Noise and Information in Nanoelectronics, Sensors, and Standards, (8 May 2003); https://doi.org/10.1117/12.488754

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