Universal Quantum Computation Based on Nanoscale Skyrmion Helicity Qubits in Frustrated Magnets.
Phys Rev Lett
; 130(10): 106701, 2023 Mar 10.
Article
em En
| MEDLINE
| ID: mdl-36962022
ABSTRACT
We propose a skyrmion-based universal quantum computer. Skyrmions have the helicity degree of freedom in frustrated magnets, where twofold degenerated Bloch-type skyrmions are energetically favored by the magnetic dipole-dipole interaction. We construct a qubit based on them. A skyrmion must become a quantum-mechanical object when its size is of the order of nanometers. It is shown that the universal quantum computation is possible based on nanoscale skyrmions in a magnetic bilayer system. The one-qubit quantum gates are materialized by controlling the electric field and the spin current. The two-qubit gate is materialized with the use of the Ising-type exchange coupling. The merit of the present mechanism is that external magnetic field is not necessary. Our results may open a possible way toward universal quantum computation based on nanoscale topological spin textures.
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MEDLINE
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En
Ano de publicação:
2023
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Article