Open AccessUsing Josephson charge qubits system to realize the transfer of a special kind of quantum state
Author(s) -
Wu Shi-Hai,
Ming-Liang Hu,
Li Ji,
Xiao-Qiang Xi
Publication year - 2011
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.60.010302
Subject(s) - flux qubit , qubit , charge qubit , physics , phase qubit , charge (physics) , josephson effect , quantum mechanics , state (computer science) , transfer (computing) , ideal (ethics) , quantum , topology (electrical circuits) , computer science , superconductivity , electrical engineering , algorithm , engineering , philosophy , epistemology , parallel computing
A type of Josephson charge qubit circuit is constructed in this paper, and properties of four-qubit quantum state transfer through this system is also investigated. By modulating the external magnetic flux, we show that ideal transfer of an excited state 1〉 from the first qubit to the fourth qubit can be realized for both homogeneous and inhomogeneous transmission channels. Moreover, the average fidelity of state transfer across this system is also analyzed, the result revealed that it cannot be used to transfer an arbitrary quantum state.