Macroscopic quantum tunneling and thermal activation in dc SQUID

F. Sharifi, J. L. Gavilano, D. J. Van Harlingen

Research output: Contribution to journalArticlepeer-review

Abstract

We have studied the transition rate from the zero-voltage state in a dc SQUID as a function of applied flux and temperature. We observe a crossover from thermal activation to macroscopic quantum tunneling at a flux-dependent temperature. The thermal rates are significantly suppressed, suggesting that the potential barrier for escape is effectively enhanced by the interaction of the macroscopic degrees of freedom in the two-dimensional dc SQUID potential.

Original languageEnglish (US)
Pages (from-to)1409-1410
Number of pages2
JournalPhysica C: Superconductivity and its applications
Volume153-155
DOIs
StatePublished - Jan 1 1988

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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