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The controlled indirect coupling between spatially-separated qubits in antiferromagnet-based NMR quantum registers

A. A. Kokin
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Abstract

It is considered the indirect inter-qubit coupling in 1D chain of atoms with nuclear spins 1/2, which plays role of qubits in the quantum register. This chain of the atoms is placed by regular way in easy-axis 3D antiferromagnetic thin plate substrate, which is cleaned from the other nuclear spin containing isotopes. It is shown that the range of indirect inter-spin coupling may run to a great number of lattice constants both near critical point of quantum phase transition in antiferromagnet of spin-flop type (control parameter is external magnetic field) and/or near homogeneous antiferromagnetic resonance (control parameter is microwave frequency).

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A. A. Kokin. 2004-10-31. The controlled indirect coupling between spatially-separated qubits in antiferromagnet-based NMR quantum registers. https://doi.org/10.1117/12.620505

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