Physics – Condensed Matter – Superconductivity
Scientific paper
2007-05-07
Jpn. J. Appl. Phys. 46 (2007) 1478
Physics
Condensed Matter
Superconductivity
5 pages, 8 figures
Scientific paper
10.1143/JJAP.46.1478
We have investigated the flux transfer characteristics of a switchable flux transformer comprising a superconducting loop and a DC superconducting quantum interference device (DC-SQUID). This system can be used to couple multiple flux qubits with a controllable coupling strength. Its characteristics were measured using a flux input coil and a DC-SQUID for readout coupled to the transformer loop in a dilution refrigerator. The observed characteristics are consistent with the calculation results. We have demonstrated the reversal of the slope of the characteristics and the complete switching off of the transformer, which are useful features for its application as a controllable coupler for flux qubits.
Niizeki T.
Shimazu Yoshihiro
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