Theory of macroscopic quantum tunneling in Nb/Au/YBCO Josephson junctions

S. Kawabata; A.A.  Golubov; null Ariando; C.J.M. Verwijs; H. Hilgenkamp

doi:10.1016/j.physc.2007.05.007

Theory of macroscopic quantum tunneling in Nb/Au/YBCO Josephson junctions

S. Kawabata, A.A. Golubov, Ariando, C.J.M. Verwijs, H. Hilgenkamp

Faculty of Science and Technology

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Abstract

We have theoretically investigated macroscopic quantum tunneling (MQT) in s-wave/d-wave (Nb/Au/YBCO) Josephson junctions, and the influence of the nodal-quasiparticle and the zero energy bound states (ZES) on MQT. In contrast to d-wave/d-wave junctions, low-energy quasiparticle excitations resulting from nodal-quasiparticles and ZES are suppressed due to the finite isotropic gap of the s-wave superconductor. Therefore, the inherent dissipation of these junctions is weak. This result suggests the high potential of s-wave/d-wave hybrid junctions for applications in quantum information devices.

Original language	English
Pages (from-to)	80-83
Journal	Physica C: Superconductivity and its applications
Volume	463-465
DOIs	https://doi.org/10.1016/j.physc.2007.05.007
Publication status	Published - 2007

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title = "Theory of macroscopic quantum tunneling in Nb/Au/YBCO Josephson junctions",

abstract = "We have theoretically investigated macroscopic quantum tunneling (MQT) in s-wave/d-wave (Nb/Au/YBCO) Josephson junctions, and the influence of the nodal-quasiparticle and the zero energy bound states (ZES) on MQT. In contrast to d-wave/d-wave junctions, low-energy quasiparticle excitations resulting from nodal-quasiparticles and ZES are suppressed due to the finite isotropic gap of the s-wave superconductor. Therefore, the inherent dissipation of these junctions is weak. This result suggests the high potential of s-wave/d-wave hybrid junctions for applications in quantum information devices.",

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note = "Proceedings of the 19th International Symposium on Superconductivity (ISS 2006) ",

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T1 - Theory of macroscopic quantum tunneling in Nb/Au/YBCO Josephson junctions

AU - Kawabata, S.

AU - Golubov, A.A.

AU - Ariando, null

AU - Verwijs, C.J.M.

AU - Hilgenkamp, H.

N1 - Proceedings of the 19th International Symposium on Superconductivity (ISS 2006)

PY - 2007

Y1 - 2007

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AB - We have theoretically investigated macroscopic quantum tunneling (MQT) in s-wave/d-wave (Nb/Au/YBCO) Josephson junctions, and the influence of the nodal-quasiparticle and the zero energy bound states (ZES) on MQT. In contrast to d-wave/d-wave junctions, low-energy quasiparticle excitations resulting from nodal-quasiparticles and ZES are suppressed due to the finite isotropic gap of the s-wave superconductor. Therefore, the inherent dissipation of these junctions is weak. This result suggests the high potential of s-wave/d-wave hybrid junctions for applications in quantum information devices.

KW - 2024 OA procedure

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DO - 10.1016/j.physc.2007.05.007

M3 - Article

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VL - 463-465

SP - 80

EP - 83

JO - Physica C: Superconductivity and its applications

JF - Physica C: Superconductivity and its applications

ER -

Theory of macroscopic quantum tunneling in Nb/Au/YBCO Josephson junctions

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