Opportunities for Long-Range Magnon-Mediated Entanglement of Spin Qubits via On- and Off-Resonant Coupling

Masaya Fukami; Denis R. Candido; David D. Awschalom; Michael E. Flatte

doi:10.1103/PRXQuantum.2.040314

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Opportunities for Long-Range Magnon-Mediated Entanglement of Spin Qubits via On- and Off-Resonant Coupling

Journal article

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Peer reviewed

Opportunities for Long-Range Magnon-Mediated Entanglement of Spin Qubits via On- and Off-Resonant Coupling

Masaya Fukami, Denis R. Candido, David D. Awschalom and Michael E. Flatte

PRX quantum, Vol.2(4), p.040314

10/21/2021

DOI: 10.1103/PRXQuantum.2.040314

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Abstract

The ability to manipulate entanglement between multiple spatially separated qubits is essential for quantum-information processing. Although nitrogen-vacancy (NV) centers in diamond provide a promising qubit platform, developing scalable two-qubit gates remains a well-known challenge. To this end, magnon-mediated entanglement proposals have attracted attention due to their long-range spin-coherent propagation. Optimal device geometries and gate protocols of such schemes, however, have yet to be determined. Here we predict strong long-distance (mu m) NV-NV coupling via magnon modes with cooperativities exceeding unity in ferromagnetic bar and waveguide structures. Moreover, we explore and compare on-resonant transduction and off-resonant virtual-magnon exchange protocols, and discuss their suitability for generating or manipulating entangled states at low temperatures (T < 150 mK) under realistic experimental conditions. This work will guide future experiments that aim to entangle spin qubits in solids with magnon excitations.

Physical Sciences

Physics

Physics, Applied

Physics, Multidisciplinary

Quantum Science & Technology

Science & Technology

Details

Title: Subtitle: Opportunities for Long-Range Magnon-Mediated Entanglement of Spin Qubits via On- and Off-Resonant Coupling
Creators: Masaya Fukami - University of Chicago
Denis R. Candido - University of Iowa
David D. Awschalom - University of Chicago
Michael E. Flatte - Eindhoven University of Technology
Resource Type: Journal article
Publication Details: PRX quantum, Vol.2(4), p.040314
DOI: 10.1103/PRXQuantum.2.040314
ISSN: 2691-3399
eISSN: 2691-3399
Publisher: Amer Physical Soc
Number of pages: 34
Grant note: N00014-17-1-3026 / Vannevar Bush Faculty Fellowship ONR DE-SC0019250 / U.S. Department of Energy, Office of Basic Energy Sciences; United States Department of Energy (DOE) U.S. Department of Energy, Office of Science, National Quantum Information Science Research Centers; United States Department of Energy (DOE) U.S. Department of Energy, Office of Basic Energy Sciences, Materials Science and Engineering Division; United States Department of Energy (DOE)
Language: English
Date published: 10/21/2021
Academic Unit: Electrical and Computer Engineering; Physics and Astronomy
Record Identifier: 9984428769402771

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