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IEICE TRANSACTIONS on Electronics

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Possibilities and Challenges of Superconducting Qubits in the Intrinsic Josephson Junctions

Haruhisa KITANO

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Summary :

Intrinsic Josephson junctions (IJJs) in the high-Tc cuprate superconductors have several fascinating properties, which are superior to the usual Josephson junctions obtained from conventional superconductors with low Tc, as follows; (1) a very thin thickness of the superconducting layers, (2) a strong interaction between junctions since neighboring junctions are closely connected in an atomic scale, (3) a clean interface between the superconducting and insulating layers, realized in a single crystal with few disorders. These unique properties of IJJs can enlarge the applicable areas of the superconducting qubits, not only the increase of qubit-operation temperature but the novel application of qubits including the macroscopic quantum states with internal degree of freedom. I present a comprehensive review of the phase dynamics in current-biased IJJs and argue the challenges of superconducting qubits utilizing IJJs.

Publication
IEICE TRANSACTIONS on Electronics Vol.E106-C No.6 pp.293-300
Publication Date
2023/06/01
Publicized
2022/12/12
Online ISSN
1745-1353
DOI
10.1587/transele.2022SEI0002
Type of Manuscript
Special Section INVITED PAPER (Special Section on Recent Progress in Physics and Applications of Intrinsic Josephson Junctions)
Category

Authors

Haruhisa KITANO
  Aoyama Gakuin University

Keyword