Demonstration of long-range correlations via susceptibility measurements in a one-dimensional superconducting Josephson spin chain

D. M. Tennant; X. Dai; A. J. Martinez; R. Trappen; D. Melanson; M. A. Yurtalan; Y. Tang; S. Bedkihal; R. Yang; S. Novikov; J. A. Grover; S. M. Disseler; J. I. Basham; R. Das; D. K. Kim; A. J. Melville; B. M. Niedzielski; S. J. Weber; J. L. Yoder; A. J. Kerman; E. Mozgunov; D. A. Lidar; A. Lupascu

doi:10.1038/s41534-022-00590-8

npj Quantum Information (Jul 2022)

Demonstration of long-range correlations via susceptibility measurements in a one-dimensional superconducting Josephson spin chain

D. M. Tennant,
X. Dai,
A. J. Martinez,
R. Trappen,
D. Melanson,
M. A. Yurtalan,
Y. Tang,
S. Bedkihal,
R. Yang,
S. Novikov,
J. A. Grover,
S. M. Disseler,
J. I. Basham,
R. Das,
D. K. Kim,
A. J. Melville,
B. M. Niedzielski,
S. J. Weber,
J. L. Yoder,
A. J. Kerman,
E. Mozgunov,
D. A. Lidar,
A. Lupascu

Affiliations

D. M. Tennant: Institute for Quantum Computing, University of Waterloo
X. Dai: Institute for Quantum Computing, University of Waterloo
A. J. Martinez: Institute for Quantum Computing, University of Waterloo
R. Trappen: Institute for Quantum Computing, University of Waterloo
D. Melanson: Institute for Quantum Computing, University of Waterloo
M. A. Yurtalan: Institute for Quantum Computing, University of Waterloo
Y. Tang: Institute for Quantum Computing, University of Waterloo
S. Bedkihal: Institute for Quantum Computing, University of Waterloo
R. Yang: Institute for Quantum Computing, University of Waterloo
S. Novikov: Northrop Grumman Corporation
J. A. Grover: Northrop Grumman Corporation
S. M. Disseler: Northrop Grumman Corporation
J. I. Basham: Northrop Grumman Corporation
R. Das: MIT Lincoln Laboratory
D. K. Kim: MIT Lincoln Laboratory
A. J. Melville: MIT Lincoln Laboratory
B. M. Niedzielski: MIT Lincoln Laboratory
S. J. Weber: MIT Lincoln Laboratory
J. L. Yoder: MIT Lincoln Laboratory
A. J. Kerman: MIT Lincoln Laboratory
E. Mozgunov: Center for Quantum Information Science & Technology, University of Southern California
D. A. Lidar: Center for Quantum Information Science & Technology, University of Southern California
A. Lupascu: Institute for Quantum Computing, University of Waterloo

DOI: https://doi.org/10.1038/s41534-022-00590-8
Journal volume & issue: Vol. 8, no. 1
pp. 1 – 9

Abstract

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Abstract Spin chains have long been considered an effective medium for long-range interactions, entanglement generation, and quantum state transfer. In this work, we explore the properties of a spin chain implemented with superconducting flux circuits, designed to act as a connectivity medium between two superconducting qubits. The susceptibility of the chain is probed and shown to support long-range, cross-chain correlations. In addition, interactions between the two end qubits, mediated by the coupler chain, are demonstrated. This work has direct applicability in near term quantum annealing processors as a means of generating long-range, coherent coupling between qubits.

Published in npj Quantum Information

ISSN: 2056-6387 (Online)
Publisher: Nature Portfolio
Country of publisher: United Kingdom
LCC subjects: Science: Physics; Science: Mathematics: Instruments and machines: Electronic computers. Computer science
Website: https://www.nature.com/npjqi/

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