Title of article
Observation of excitation in asymmetric flux qubits coupled inductively
Author/Authors
Y. Shimazu، نويسنده , , Y. Wada، نويسنده , , T. Niizeki، نويسنده , , Y. Yamamoto، نويسنده , , T. Yoshida، نويسنده , , Z. Wada، نويسنده , , T. Yokoyama، نويسنده ,
Issue Information
دوهفته نامه با شماره پیاپی سال 2005
Pages
5
From page
679
To page
683
Abstract
We measured magnetic flux produced by coupled flux qubits with a switching current measurement of a DC-SQUID. Both the circulating currents and the SQUID–qubit coupling were designed to be asymmetric. The experimental result exhibits a broad peak and dip, and does not agree with the thermally averaged magnetic flux calculated with the two qubit Hamiltonian. This disagreement can be explained in terms of nonthermal excitation of the coupled qubits, which is probably caused by the microwaves generated by the DC-SQUID in the voltage state.
Keywords
Josephson junction , Flux qubit , DC-SQUID
Journal title
Physica E Low-dimensional Systems and Nanostructures
Serial Year
2005
Journal title
Physica E Low-dimensional Systems and Nanostructures
Record number
1051734
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