Josephson Persistent-Current Qubit

J. E. Mooij; Terry P. Orlando; Leonid Levitov; Lin Tian; C. H. van der Wal; Seth Lloyd

doi:10.1126/science.285.5430.1036

Abstract

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

Keywords

Flux qubitPhase qubitJosephson effectQubitCharge qubitPhysicsSuperconducting quantum computingMagnetic fluxSuperconductivityCondensed matter physicsMagnetic flux quantumPi Josephson junctionQuantum mechanicsQuantumMagnetic field

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Publication Info

Year: 1999
Type: article
Volume: 285
Issue: 5430
Pages: 1036-1039
Citations: 1330
Access: Closed

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APA Style

                            
                                
                                    J. E. Mooij, 
                                
                                    Terry P. Orlando, 
                                
                                    Leonid Levitov
                                
                                et al.
                            
                            (1999). 
                            Josephson Persistent-Current Qubit. 
                            Science
                            , 285
                            (5430)
                            , 1036-1039.
                            https://doi.org/10.1126/science.285.5430.1036
                        

Identifiers

DOI: 10.1126/science.285.5430.1036