Adiabatic quantum computation in open systems

We analyze the performance of adiabatic quantum computation (AQC) subject to decoherence. To this end, we introduce an inherently open-systems approach, based on a recent generalization of the adiabatic approximation. In contrast to closed systems, we show that a system may initially be in an adiaba...

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Bibliographic Details
Published in:Physical review letters 2005-12, Vol.95 (25), p.250503.1-250503.4, Article 250503
Main Authors: SARANDY, M. S, LIDAR, D. A
Format: Article
Language:English
Subjects:
Exact sciences and technology
Physics
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Summary:We analyze the performance of adiabatic quantum computation (AQC) subject to decoherence. To this end, we introduce an inherently open-systems approach, based on a recent generalization of the adiabatic approximation. In contrast to closed systems, we show that a system may initially be in an adiabatic regime, but then undergo a transition to a regime where adiabaticity breaks down. As a consequence, the success of AQC depends sensitively on the competition between various pertinent rates, giving rise to optimality criteria.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.95.250503