Macroscopic quantum effect in intrinsic Josephson junctions containing magnetic flux

Tomio Koyama, Masahiko Machida, Masaru Kato, Takekazu Ishida

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


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 languageEnglish
Pages (from-to)985-988
Number of pages4
JournalPhysica C: Superconductivity and its applications
Issue numberSUPPL.
Publication statusPublished - 2007 Oct 1
Externally publishedYes


  • 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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