Collective macroscopic tunneling in intrinsic Josephson junctions

Masahiko Machida, Tomio Koyama

Research output: Contribution to journalArticlepeer-review


A theory for photon-assisted macroscopic quantum tunneling (MQT) in a stack of capacitively-coupled intrinsic Josephson junctions is proposed. The theory predicts how the quantized energy-levels in the N-junction stacked system distribute. Furthermore, the theory reveals that the MQT escape rate from the single-plasmon states to the uniform voltage ones under microwave irradiation is proportional to the square of the junction number (N2). This result is consistent with the recent observation in Bi-2212 intrinsic Josephson junctions.

Original languageEnglish
Pages (from-to)289-292
Number of pages4
JournalPhysica C: Superconductivity and its applications
Volume460-462 I
Issue numberSPEC. ISS.
Publication statusPublished - 2007 Sep 1


  • Intrinsic Josephson junction
  • Macroscopic quantum tunneling
  • Microwave assisted 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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