Decoherence in a scalable adiabatic quantum computer

Sahel Ashhab, J. R. Johansson, Franco Nori

Research output: Contribution to journalArticle

48 Citations (Scopus)

Abstract

We consider the effects of decoherence on Landau-Zener crossings encountered in a large-scale adiabatic-quantum-computing setup. We analyze the dependence of the success probability-i.e., the probability for the system to end up in its new ground state-on the noise amplitude and correlation time. We determine the optimal sweep rate that is required to maximize the success probability. We then discuss the scaling of decoherence effects with increasing system size. We find that those effects can be important for large systems, even if they are small for each of the small building blocks.

Original languageEnglish
Article number052330
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Volume74
Issue number5
DOIs
Publication statusPublished - 27 Nov 2006
Externally publishedYes

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quantum computers
quantum computation
scaling
ground state

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Physics and Astronomy(all)

Cite this

Decoherence in a scalable adiabatic quantum computer. / Ashhab, Sahel; Johansson, J. R.; Nori, Franco.

In: Physical Review A - Atomic, Molecular, and Optical Physics, Vol. 74, No. 5, 052330, 27.11.2006.

Research output: Contribution to journalArticle

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