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Phys. Rev. A 71, 060306(R) (2005) [4 pages]

Dynamical imperfections in quantum computers

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Paolo Facchi1, Simone Montangero2, Rosario Fazio2, and Saverio Pascazio1
1Dipartimento di Fisica, Università di Bari, I-70126 Bari, Italy and INFN, Sezione di Bari, I-70126 Bari, Italy
2NEST-INFM & Scuola Normale Superiore, Piazza dei Cavalieri 7, 56126 Pisa, Italy

Received 14 July 2004; published 22 June 2005

We study the effects of dynamical imperfections in quantum computers. By considering an explicit example, we identify different regimes ranging from the low-frequency case, where the imperfections can be considered as static but with renormalized parameters, to the high-frequency fluctuations, where the effects of imperfections are completely wiped out. We generalize our results by proving a theorem on the dynamical evolution of a system in the presence of dynamical perturbations.

© 2005 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevA.71.060306
DOI:
10.1103/PhysRevA.71.060306
PACS:
03.67.Lx, 03.67.Mn, 03.67.Pp, 05.45.Mt