Superconducting quantum bit with ferromagnetic π-junction

T. Yamashita, S. Takahashi, S. Maekawa

研究成果: 書籍の章/レポート/Proceedings会議への寄与査読

抄録

We propose a new qubit consisting of a superconducting ring with an ordinary Josephson junction and a ferromagnetic π-junction. In the system, two degenerate stable states appear in the phase space without an external magnetic field due to a competition between the 0- and π-states. Because of quantum tunneling between the two degenerate states, bonding and antibonding states, which are used as a bit, are formed. For manipulating the states of the qubit, only small external magnetic field around zero is required. This feature leads to a large-scale integration and a construction of the qubit with a smaller size which is robust to decoherence by external noises.

本文言語英語
ホスト出版物のタイトルProceedings of the 8th International Symposium on Foundations of Quantum Mechanics in the Light of New Technology, ISQM-Tokyo 2005
出版社World Scientific Publishing Co. Pte Ltd
ページ84-87
ページ数4
ISBN(印刷版)9812568581, 9789812568588
DOI
出版ステータス出版済み - 2006
イベント8th International Symposium on Foundations of Quantum Mechanics in the Light of New Technology, ISQM-Tokyo 2005 - Hatoyama, Saitama, 日本
継続期間: 2005 8月 222005 8月 25

出版物シリーズ

名前Proceedings of the 8th International Symposium on Foundations of Quantum Mechanics in the Light of New Technology, ISQM-Tokyo 2005

会議

会議8th International Symposium on Foundations of Quantum Mechanics in the Light of New Technology, ISQM-Tokyo 2005
国/地域日本
CityHatoyama, Saitama
Period05/8/2205/8/25

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