Open AccessSubspace quantum process tomography via nuclear magnetic resonance
Author(s) -
Xiwei Yao,
Zeng Bi-Rong,
Qin Liu,
Mu Xiao-Yang,
Lin Xing-Cheng,
Yang Chun,
Pan Jian,
Cheng Zhong
Publication year - 2010
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.59.6837
Subject(s) - physics , subspace topology , quantum process , qubit , quantum , quantum decoherence , decoherence free subspaces , process (computing) , quantum mechanics , coupling (piping) , nuclear magnetic resonance , tomography , quantum error correction , computer science , optics , quantum dynamics , materials science , artificial intelligence , metallurgy , operating system
Experimental investigation of subspace quantum process tomography in three-spin system was implemented via nuclear magnetic resonance. A quantum process was characterized by measuring a complete set of input states and corresponding outputs. The method using ancillary qubit remarkably reduces the number of the initial input states. And the pulse sequences used in this paper have fewer J-coupling evolutions. The experiment time was shortened and quantum decoherence of the system was weakened efficiently.