Control of decoherence: Analysis and comparison of three different strategies

P. Facchi, S. Tasaki, S. Pascazio, H. Nakazato, A. Tokuse, D. A. Lidar

研究成果: Article査読

176 被引用数 (Scopus)

抄録

We analyze and compare three different strategies, all aimed at controlling and eventually halting decoherence. The first strategy hinges upon the quantum Zeno effect, the second makes use of frequent unitary interruptions ("bang-bang" pulses and their generalization, quantum dynamical decoupling), and the third uses a strong, continuous coupling. Decoherence is shown to be suppressed only if the frequency N of the measurements or pulses is large enough or if the coupling K is sufficiently strong. Otherwise, if N or K is large, but not extremely large, all these control procedures accelerate decoherence. We investigate the problem in a general setting and then consider some practical examples, relevant for quantum computation.

本文言語English
論文番号022302
ジャーナルPhysical Review A - Atomic, Molecular, and Optical Physics
71
2
DOI
出版ステータスPublished - 2005 2 1

ASJC Scopus subject areas

  • 原子分子物理学および光学

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