Phys. Rev. B 75, 224504 (2007) [13 pages]Reading out the state of a flux qubit by Josephson transmission line solitonsReceived 28 November 2006; revised 2 February 2007; published 7 June 2007 We describe the readout process of the state of a Josephson flux qubit via solitons in Josephson transmission lines (JTLs) as they are in use in the standard rapid single flux quantum technology. We consider the situation where the information about the state of the qubit is stored in the time delay of the soliton. We analyze dissipative underdamped JTLs, take into account their jitter, and provide estimates of the measuring time and efficiency of the measurement for relevant experimental parameters. © 2007 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.75.224504
DOI:
10.1103/PhysRevB.75.224504
PACS:
03.67.Lx, 85.25.−j, 03.65.Ta
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