Parametric coupling for superconducting qubits

Details Parametric coupling for superconducting qubits Parametric coupling for superconducting qubits

2005-09-30

arxiv.org/abs/cond-mat/0509799v2

Phys. Rev. B 73, 064512 (2006)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

6 pages

Scientific paper

10.1103/PhysRevB.73.064512

We propose a scheme to couple two superconducting charge or flux qubits biased at their symmetry points with unequal energy splittings. Modulating the coupling constant between two qubits at the sum or difference of their two frequencies allows to bring them into resonance in the rotating frame. Switching on and off the modulation amounts to switching on and off the coupling which can be realized at nanosecond speed. We discuss various physical implementations of this idea, and find that our scheme can lead to rapid operation of a two-qubit gate.

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