J
J. Johansson
Researcher at D-Wave Systems
Publications - 47
Citations - 3243
J. Johansson is an academic researcher from D-Wave Systems. The author has contributed to research in topics: Flux qubit & Josephson effect. The author has an hindex of 19, co-authored 42 publications receiving 2676 citations. Previous affiliations of J. Johansson include University of Agder & Royal Institute of Technology.
Papers
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Journal ArticleDOI
Quantum annealing with manufactured spins
Mark W. Johnson,M. H. S. Amin,Gildert Suzanne,Trevor Lanting,Firas Hamze,Neil G. Dickson,Richard Harris,Andrew J. Berkley,J. Johansson,Paul I. Bunyk,E. M. Chapple,C. Enderud,Jeremy P. Hilton,Kamran Karimi,E. Ladizinsky,N. Ladizinsky,T. Oh,I. Perminov,C. Rich,Murray C. Thom,E. Tolkacheva,C. J. S. Truncik,Sergey Uchaikin,J. Wang,B. Wilson,Geordie Rose +25 more
TL;DR: This programmable artificial spin network bridges the gap between the theoretical study of ideal isolated spin networks and the experimental investigation of bulk magnetic samples, and may provide a practical physical means to implement a quantum algorithm, possibly allowing more-effective approaches to solving certain classes of hard combinatorial optimization problems.
Journal ArticleDOI
Experimental investigation of an eight-qubit unit cell in a superconducting optimization processor
Richard Harris,Mark W. Johnson,Trevor Lanting,Andrew J. Berkley,J. Johansson,Paul I. Bunyk,E. Tolkacheva,E. Ladizinsky,N. Ladizinsky,T. Oh,F Cioata,Ilya Perminov,P. Spear,C. Enderud,C. Rich,Sergey Uchaikin,Murray C. Thom,E. M. Chapple,Jing Wang,B. Wilson,M. H. S. Amin,Neil G. Dickson,Kamran Karimi,B. Macready,C. J. S. Truncik,Geordie Rose +25 more
TL;DR: In this article, a superconducting chip containing a regular array of flux qubits, tunable interqubit inductive couplers, an XY-addressable readout system, on-chip programmable magnetic memory, and a sparse network of analog control lines has been studied.
Journal ArticleDOI
Experimental demonstration of a robust and scalable flux qubit
Richard Harris,J. Johansson,Andrew J. Berkley,Mark W. Johnson,Trevor Lanting,Siyuan Han,Paul I. Bunyk,E. Ladizinsky,T. Oh,I. Perminov,E. Tolkacheva,Sergey Uchaikin,E. M. Chapple,C. Enderud,C. Rich,Murray C. Thom,J. Wang,B. Wilson,Geordie Rose +18 more
TL;DR: In this article, a superconducting quantum interference device (SQUID) flux qubit that is robust against fabrication variations in Josephson-junction critical currents and device inductance has been implemented.
Journal ArticleDOI
A scalable control system for a superconducting adiabatic quantum optimization processor
Mark W. Johnson,Paul I. Bunyk,F Maibaum,Elena G. Tolkacheva,Andrew J. Berkley,E. M. Chapple,Richard Harris,J. Johansson,Trevor Lanting,I. Perminov,E. Ladizinsky,T. Oh,Geordie Rose +12 more
TL;DR: In this paper, a scalable system for applying independently programmable time-independent, and limited time-dependent flux biases to control superconducting devices in an integrated circuit is presented, which requires six digital address lines, two power lines, and a handful of global analog lines.
Journal ArticleDOI
A scalable control system for a superconducting adiabatic quantum optimization processor
Mark W. Johnson,Paul I. Bunyk,F Maibaum,Elena G. Tolkacheva,Andrew J. Berkley,E. M. Chapple,Richard Harris,J. Johansson,Trevor Lanting,I. Perminov,E. Ladizinsky,T. Oh,Geordie Rose +12 more
TL;DR: In this article, a scalable system for applying independently programmable time-independent, and limited time-dependent flux biases to control superconducting devices in an integrated circuit is presented, which requires six digital address lines, two power lines, and a handful of global analog lines.