Qubit leakage suppression by ultrafast composite pulses

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The leakage suppression problem is considered for a three-level ladder-type quantum system, in which the first two levels are the qubit system and the third is the leakage state weakly coupled to the qubit system. We show that two (three) phase- and amplitude-controlled pulses are sufficient for arbitrary qubit controls from the ground (an arbitrary) initial state, with leakage suppressed up to the first order of perturbation without additional pulse-area cost. A proof-of-principle experiment was performed with shaped ultrafast optical pulses and cold rubidium atoms, and the result shows a good agreement with the theory. (C) 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
Publisher
OPTICAL SOC AMER
Issue Date
2019-02
Language
English
Article Type
Article
Citation

OPTICS EXPRESS, v.27, no.4, pp.3944 - 3951

ISSN
1094-4087
DOI
10.1364/OE.27.003944
URI
http://hdl.handle.net/10203/251798
Appears in Collection
PH-Journal Papers(저널논문)
Files in This Item
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