Josephson Persistent-Current Qubit

• DOI: 10.1126/science.285.5430.1036
• Publication Date: 2002-07-27T09:42:20Z
• Authors: J. E. Mooij; T. P. Orlando; L. Levitov; Lin Tian; Caspar H. van der...; Seth Lloyd
• Keywords: Flux qubit; Charge qubit; Magnetic flux quantum

A qubit was designed that can be fabricated with conventional electron beam lithography and is suited for integration into a large quantum computer. The consists of micrometer-sized loop three or four Josephson junctions; the two states have persistent currents opposite direction. Quantum superpositions these are obtained by pulsed microwave modulation enclosed magnetic flux in control lines. superconducting transporter allows controlled transfer between qubits generated currents, leading to entanglement information.