Macroscopic quantum tunneling in a stack of capacitively-coupled intrinsic Josephson junctions

Tomio Koyama; Masahiko Machida

doi:10.1016/j.physc.2007.11.033

Macroscopic quantum tunneling in a stack of capacitively-coupled intrinsic Josephson junctions

Tomio Koyama, Masahiko Machida

Research output: Contribution to journal › Article › peer-review

11 Citations (Scopus)

Abstract

A macroscopic quantum theory for the phase dynamics in capacitively-coupled intrinsic Josephson junctions (IJJ's) is constructed. We quantize the capacitively-coupled IJJ model in terms of the canonical quantization method. The multi-junction effect for the macroscopic quantum tunneling (MQT) to the first resistive branch is clarified. It is shown that the escape rate is greatly enhanced by the capacitive coupling between junctions. We also discuss the origin of the N²-enhancement in the escape rate observed in the uniformly switching in Bi-2212 IJJ's.

Original language	English
Pages (from-to)	695-700
Number of pages	6
Journal	Physica C: Superconductivity and its applications
Volume	468
Issue number	7-10
DOIs	https://doi.org/10.1016/j.physc.2007.11.033
Publication status	Published - 2008 Apr 1
Externally published	Yes

Keywords

Capacitively-coupled intrinsic Josephson junction model
Intrinsic Josephson junctions
Macroscopic quantum tunneling

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

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10.1016/j.physc.2007.11.033

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title = "Macroscopic quantum tunneling in a stack of capacitively-coupled intrinsic Josephson junctions",

abstract = "A macroscopic quantum theory for the phase dynamics in capacitively-coupled intrinsic Josephson junctions (IJJ's) is constructed. We quantize the capacitively-coupled IJJ model in terms of the canonical quantization method. The multi-junction effect for the macroscopic quantum tunneling (MQT) to the first resistive branch is clarified. It is shown that the escape rate is greatly enhanced by the capacitive coupling between junctions. We also discuss the origin of the N2-enhancement in the escape rate observed in the uniformly switching in Bi-2212 IJJ's.",

keywords = "Capacitively-coupled intrinsic Josephson junction model, Intrinsic Josephson junctions, Macroscopic quantum tunneling",

author = "Tomio Koyama and Masahiko Machida",

note = "Funding Information: This work was partially supported by Grant-in-Aid for the Scientific Research (C) from the Japan Society for the Promotion of Science.",

year = "2008",

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doi = "10.1016/j.physc.2007.11.033",

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journal = "Physica C: Superconductivity and its Applications",

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T1 - Macroscopic quantum tunneling in a stack of capacitively-coupled intrinsic Josephson junctions

AU - Koyama, Tomio

AU - Machida, Masahiko

N1 - Funding Information: This work was partially supported by Grant-in-Aid for the Scientific Research (C) from the Japan Society for the Promotion of Science.

PY - 2008/4/1

Y1 - 2008/4/1

N2 - A macroscopic quantum theory for the phase dynamics in capacitively-coupled intrinsic Josephson junctions (IJJ's) is constructed. We quantize the capacitively-coupled IJJ model in terms of the canonical quantization method. The multi-junction effect for the macroscopic quantum tunneling (MQT) to the first resistive branch is clarified. It is shown that the escape rate is greatly enhanced by the capacitive coupling between junctions. We also discuss the origin of the N2-enhancement in the escape rate observed in the uniformly switching in Bi-2212 IJJ's.

AB - A macroscopic quantum theory for the phase dynamics in capacitively-coupled intrinsic Josephson junctions (IJJ's) is constructed. We quantize the capacitively-coupled IJJ model in terms of the canonical quantization method. The multi-junction effect for the macroscopic quantum tunneling (MQT) to the first resistive branch is clarified. It is shown that the escape rate is greatly enhanced by the capacitive coupling between junctions. We also discuss the origin of the N2-enhancement in the escape rate observed in the uniformly switching in Bi-2212 IJJ's.

KW - Capacitively-coupled intrinsic Josephson junction model

KW - Intrinsic Josephson junctions

KW - Macroscopic quantum tunneling

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DO - 10.1016/j.physc.2007.11.033

M3 - Article

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EP - 700

JO - Physica C: Superconductivity and its Applications

JF - Physica C: Superconductivity and its Applications

SN - 0921-4534

IS - 7-10

ER -

Macroscopic quantum tunneling in a stack of capacitively-coupled intrinsic Josephson junctions

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Keywords

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