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

Tomio Koyama, Masahiko Machida

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)


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 languageEnglish
Pages (from-to)695-700
Number of pages6
JournalPhysica C: Superconductivity and its applications
Issue number7-10
Publication statusPublished - 2008 Apr 1
Externally publishedYes


  • 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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