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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.

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Quantum annealing with manufactured spins

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.
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Experimental investigation of an eight-qubit unit cell in a superconducting optimization processor

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.
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Experimental demonstration of a robust and scalable flux qubit

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.
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A scalable control system for a superconducting adiabatic quantum optimization processor

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

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.