Entangling flux qubits with a bipolar dynamic inductance

Britton Plourde; J. Zhang; K. B. Whaley; F. K. Wilhelm; T. L. Robertson; T. Hime; S. Linzen; P. A. Reichardt; C. E. Wu; John Clarke

doi:10.1103/PhysRevB.70.140501

Entangling flux qubits with a bipolar dynamic inductance

Britton Plourde, J. Zhang, K. B. Whaley, F. K. Wilhelm, T. L. Robertson, T. Hime, S. Linzen, P. A. Reichardt, C. E. Wu, John Clarke

Department of Physics

Research output: Contribution to journal › Article

90 Scopus citations

Abstract

We propose a scheme to implement controllable coupling between two flux qubits using the screening current response of a dc superconducting quantum interference device (SQUID). The coupling strength is adjusted by the current bias applied to the SQUID and can be varied continuously from positive to negative values, allowing cancellation of the direct mutual inductance between the qubits. We show that this variable coupling scheme permits efficient realization of universal quantum logic. The same SQUID can be used to determine the flux states of the qubits.

Original language	English (US)
Article number	140501(R)
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	70
Issue number	14
DOIs	https://doi.org/10.1103/PhysRevB.70.140501
State	Published - Oct 2004

Fingerprint

ASJC Scopus subject areas

Condensed Matter Physics

Cite this

Plourde, B., Zhang, J., Whaley, K. B., Wilhelm, F. K., Robertson, T. L., Hime, T., Linzen, S., Reichardt, P. A., Wu, C. E., & Clarke, J. (2004). Entangling flux qubits with a bipolar dynamic inductance. Physical Review B - Condensed Matter and Materials Physics, 70(14), [140501(R)]. https://doi.org/10.1103/PhysRevB.70.140501

@article{b2b060e754414a5aa12daa58611c63d8,

title = "Entangling flux qubits with a bipolar dynamic inductance",

abstract = "We propose a scheme to implement controllable coupling between two flux qubits using the screening current response of a dc superconducting quantum interference device (SQUID). The coupling strength is adjusted by the current bias applied to the SQUID and can be varied continuously from positive to negative values, allowing cancellation of the direct mutual inductance between the qubits. We show that this variable coupling scheme permits efficient realization of universal quantum logic. The same SQUID can be used to determine the flux states of the qubits.",

author = "Britton Plourde and J. Zhang and Whaley, {K. B.} and Wilhelm, {F. K.} and Robertson, {T. L.} and T. Hime and S. Linzen and Reichardt, {P. A.} and Wu, {C. E.} and John Clarke",

year = "2004",

month = oct

doi = "10.1103/PhysRevB.70.140501",

language = "English (US)",

volume = "70",

journal = "Physical Review B-Condensed Matter",

issn = "0163-1829",

publisher = "American Institute of Physics Publising LLC",

number = "14",

}

TY - JOUR

T1 - Entangling flux qubits with a bipolar dynamic inductance

AU - Plourde, Britton

AU - Zhang, J.

AU - Whaley, K. B.

AU - Wilhelm, F. K.

AU - Robertson, T. L.

AU - Hime, T.

AU - Linzen, S.

AU - Reichardt, P. A.

AU - Wu, C. E.

AU - Clarke, John

PY - 2004/10

Y1 - 2004/10

N2 - We propose a scheme to implement controllable coupling between two flux qubits using the screening current response of a dc superconducting quantum interference device (SQUID). The coupling strength is adjusted by the current bias applied to the SQUID and can be varied continuously from positive to negative values, allowing cancellation of the direct mutual inductance between the qubits. We show that this variable coupling scheme permits efficient realization of universal quantum logic. The same SQUID can be used to determine the flux states of the qubits.

AB - We propose a scheme to implement controllable coupling between two flux qubits using the screening current response of a dc superconducting quantum interference device (SQUID). The coupling strength is adjusted by the current bias applied to the SQUID and can be varied continuously from positive to negative values, allowing cancellation of the direct mutual inductance between the qubits. We show that this variable coupling scheme permits efficient realization of universal quantum logic. The same SQUID can be used to determine the flux states of the qubits.

UR - http://www.scopus.com/inward/record.url?scp=19944414920&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=19944414920&partnerID=8YFLogxK

U2 - 10.1103/PhysRevB.70.140501

DO - 10.1103/PhysRevB.70.140501

M3 - Article

AN - SCOPUS:19944414920

VL - 70

JO - Physical Review B-Condensed Matter

JF - Physical Review B-Condensed Matter

SN - 0163-1829

IS - 14

M1 - 140501(R)

ER -

Access to Document

10.1103/PhysRevB.70.140501