Direct Josephson coupling between superconducting flux qubits
超导电性
2007-05-23 v2 介观与纳米尺度物理
摘要
We have demonstrated strong antiferromagnetic coupling between two three-junction flux qubits based on a shared Josephson junction, and therefore not limited by the small inductances of the qubit loops. The coupling sign and magnitude were measured by coupling the system to a high-quality superconducting tank circuit. Design modifications allowing to continuously tune the coupling strength and/or make the coupling ferromagnetic are discussed.
关键词
引用
@article{arxiv.cond-mat/0501085,
title = {Direct Josephson coupling between superconducting flux qubits},
author = {M. Grajcar and A. Izmalkov and S. H. W. van der Ploeg and S. Linzen and E. Il'ichev and Th. Wagner and U. Hubner and H. -G. Meyer and Alec Maassen van den Brink and S. Uchaikin and A. M. Zagoskin},
journal= {arXiv preprint arXiv:cond-mat/0501085},
year = {2007}
}
备注
REVTeX 4, 4 pages, 5 figures; v2: completely rewritten, added finite-temperature results and proposals for ferromagnetic galvanic coupling