Switchable resonant coupling of flux qubits

Details Switchable resonant coupling of flux qubits Switchable resonant coupling of flux qubits

2006-05-19

arxiv.org/abs/cond-mat/0605484v3

Phys. Rev. B 74, 172505 (2006)

Physics

Condensed Matter

Superconductivity

REVTeX 4, 4 pages, 2 figures, v2: reference added, v3: final version published in Phys. Rev. B

Scientific paper

10.1103/PhysRevB.74.172505

We propose a coupling scheme, where two or more flux qubits with different eigenfrequencies share Josephson junctions with a coupler loop devoid of its own quantum dynamics. Switchable two-qubit coupling is realized by tuning the frequency of the AC magnetic flux through the coupler to a combination frequency of two of the qubits. The coupling allows any or all of the qubits to be simultaneously at the degeneracy point and can change sign.

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