Report

Solid-State Qubits with Current-Controlled Coupling

+ See all authors and affiliations

Science  01 Dec 2006:
Vol. 314, Issue 5804, pp. 1427-1429
DOI: 10.1126/science.1134388

You are currently viewing the abstract.

View Full Text

Abstract

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.

    View Full Text