Long range magnetic dipole-dipole interaction mediated by a superconductor

• URL: http://arxiv.org/abs/2107.05130v1
• Date: Sun, 11 Jul 2021 21:16:29 GMT
• Title: Long range magnetic dipole-dipole interaction mediated by a superconductor
• Authors: Yoav Romach, Tal Wasserman, Shai Tishby, Nir Bar-Gill
• Abstract summary: Quantum computation and simulation requires strong coherent coupling between qubits, which may be spatially separated. 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 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.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: 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 long-standing 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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