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Realization of a classical counterpart of a scalable design for adiabatic quantum computation

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9 Author(s)
Zakosarenko, V. ; Institute for Physical High Technology, P.O. Box 100239, D-07702 Jena, Germany ; Bondarenko, N. ; van der Ploeg, S.H.W. ; Izmalkov, A.
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The authors implement a classical counterpart of a scalable design for adiabatic quantum computation. The key element of this design is a coupler providing controllable coupling between two bistable elements (in our case superconducting rings with a single Josephson junction playing the role of a classical counterpart of superconducting flux qubits). The coupler is also a superconducting ring with a single Josephson junction that operates in the nonhysteretic mode with a screening parameter of about 0.9. The flux coupling between two bistable rings can be controlled by changing the magnetic flux through the coupler. Since the coupling amplitude is proportional to the derivative of the coupler’s current-flux relation, the coupling can be tuned from ferromagnetic to antiferromagnetic. In between the coupling can also be switched off.

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Applied Physics Letters  (Volume:90 ,  Issue: 2 )