Novel coupling scheme between distant Nitrogen-Vacancy centers through nano-fabricated superconducting structures

Romach, Yoav; Katz, Nadav; Bar‐Gill, Nir

doi:10.1364/qim.2017.qt6a.49

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2021

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“…These results could significantly impact several fields, including SQUIDs [39], magnetic levitation [42], quantum sensing and quantum computation [3,43]. Specifically, our findings could potentially allow coherent long range dipole-dipole interactions, which could pave the way toward scalable quantum computing in solid-state spin qubit architectures.…”

Section: Discussion and Summarymentioning

confidence: 75%

Long range magnetic dipole-dipole interaction mediated by a superconductor

Romach,

Wasserman,

Tishby

et al. 2021

Preprint

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Quantum computation and simulation requires strong coherent coupling between qubits, which may be spatially separated. Achieving this coupling for solid-state based spin qubits is a longstanding challenge. Here we theoretically investigate a method for achieving such coupling, based on superconducting nano-structures designed to channel the magnetic flux created by the qubits. We detail semi-classical analytical calculations and simulations of the magnetic field created by a magnetic dipole, depicting the spin qubit, positioned directly below nanofabricated apertures in a superconducting layer. We show that such structures could channel the magnetic flux, enhancing the dipole-dipole interaction between spin qubits and changing its scaling with distance, thus potentially paving the way for controllably engineering an interacting spin system.

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