Arbitrarily accurate composite pulses

K Brown, A Harrow, I Chuang

Research output: Contribution to journalArticle (Academic Journal)peer-review

118 Citations (Scopus)


Systematic errors in quantum operations can be the dominating source of imperfection in achieving control over quantum systems. This problem, which has been well studied in nuclear magnetic resonance, can be addressed by replacing single operations with composite sequences of pulsed operations, which cause errors to cancel by symmetry. Remarkably, this can be achieved without knowledge of the amount of error \epsilon. Independent of the initial state of the system, current techniques allow the error to be reduced to O(\epsilon^3). Here, we extend the composite pulse technique to cancel errors to O(\epsilon^n), for arbitrary n.
Translated title of the contributionArbitrarily accurate composite pulses
Original languageEnglish
Pages (from-to)052318
JournalPhysical Review A: Atomic, Molecular and Optical Physics
Publication statusPublished - Nov 2004

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