Journal
SCIENCE
Volume 314, Issue 5804, Pages 1427-1429Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.1134388
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The ability to switch the coupling between quantum bits (qubits) on and off is essential for implementing many quantum-computing algorithms. We demonstrated such control with two flux qubits coupled together through their mutual inductances and through the dc superconducting quantum interference device ( SQUID) that reads out their magnetic flux states. A bias current applied to the SQUID in the zero-voltage state induced a change in the dynamic inductance, reducing the coupling energy controllably to zero and reversing its sign.
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