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Macroscopic Quantum Tunneling and Resonant Activation of Current Biased Intrinsic Josephson Junctions in Bi-2212
Shigeo SATO Kunihiro INOMATA Mitsunaga KINJO Nobuhiro KITABATAKE Koji NAKAJIMA Huabing WANG Takeshi HATANO
IEICE TRANSACTIONS on Electronics
Publication Date: 2007/03/01
Online ISSN: 1745-1353
Print ISSN: 0916-8516
Type of Manuscript: INVITED PAPER (Special Section on Innovative Superconducting Devices and Their Applications)
Josephson junction, macroscopic quantum tunneling, high-Tc superconductor, resonant activation, qubit,
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The utilization of a high-Tc superconductor for implementing a superconducting qubit is to be expected. Recent researches on the quantum property of Josephson junctions in high-Tc superconductors indicate that the low energy quasiparticle excitation is weak enough to observe the macroscopic quantum tunneling. Therefore, a detailed study on the quantum property of high-Tc Josephson junctions becomes more important for applications. We show our experimental results of the macroscopic tunneling of current biased intrinsic Josephson junctions in Bi-2212 and its resonant activation in the presence of microwave radiation.