Macroscopic quantum effect in intrinsic Josephson junctions containing magnetic flux

Tomio Koyama; Masahiko Machida; Masaru Kato; Takekazu Ishida

doi:10.1016/j.physc.2006.12.024

Macroscopic quantum effect in intrinsic Josephson junctions containing magnetic flux

Tomio Koyama, Masahiko Machida, Masaru Kato, Takekazu Ishida

Institute for Materials Research (IMR)

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

3 Citations (Scopus)

Abstract

We formulate a quantum theory that can describe the macroscopic quantum tunneling (MQT) in intrinsic Josephson junction stacks. Both capacitive and inductive couplings between junctions in the stacks are considered. It is shown that the inductive coupling renormalizes the height of the potential barrier, while the capacitive coupling causes mass renormalization, when the switching event in the I-V characteristics is mapped onto the problem of a quasi-classical particle showing MQT. Both couplings enhance the MQT rate.

Original language	English
Pages (from-to)	985-988
Number of pages	4
Journal	Physica C: Superconductivity and its applications
Volume	463-465
Issue number	SUPPL.
DOIs	https://doi.org/10.1016/j.physc.2006.12.024
Publication status	Published - 2007 Oct 1

Keywords

I-V characteristics
Intrinsic Josephson junctions
MQT

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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AU - Koyama, Tomio

AU - Machida, Masahiko

AU - Kato, Masaru

AU - Ishida, Takekazu

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Y1 - 2007/10/1

N2 - We formulate a quantum theory that can describe the macroscopic quantum tunneling (MQT) in intrinsic Josephson junction stacks. Both capacitive and inductive couplings between junctions in the stacks are considered. It is shown that the inductive coupling renormalizes the height of the potential barrier, while the capacitive coupling causes mass renormalization, when the switching event in the I-V characteristics is mapped onto the problem of a quasi-classical particle showing MQT. Both couplings enhance the MQT rate.

AB - We formulate a quantum theory that can describe the macroscopic quantum tunneling (MQT) in intrinsic Josephson junction stacks. Both capacitive and inductive couplings between junctions in the stacks are considered. It is shown that the inductive coupling renormalizes the height of the potential barrier, while the capacitive coupling causes mass renormalization, when the switching event in the I-V characteristics is mapped onto the problem of a quasi-classical particle showing MQT. Both couplings enhance the MQT rate.

KW - I-V characteristics

KW - Intrinsic Josephson junctions

KW - MQT

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SN - 0921-4534

IS - SUPPL.

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Macroscopic quantum effect in intrinsic Josephson junctions containing magnetic flux

Abstract

Keywords

ASJC Scopus subject areas

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