Evidence of two-dimensional macroscopic quantum tunneling of a current-biased dc SQUID

F. Balestro, J. Claudon, Jukka Pekola, O. Buisson

Research output: Contribution to journalArticleScientificpeer-review

36 Citations (Scopus)
121 Downloads (Pure)

Abstract

The escape probability out of the superconducting state of a hysteretic dc SQUID has been measured at different values of the applied magnetic flux. At low temperatures, the escape current and the width of the probability distribution are temperature independent but they depend on flux. Experimental results do not fit the usual one-dimensional macroscopic quantum tunneling (MQT) law but are perfectly accounted for by the two-dimensional MQT behavior as we propose here. Near zero flux, our data confirms the recent MQT observation in a dc SQUID [S. Li et al., Phys. Rev. Lett. 89, 98301 (2002)].
Original languageEnglish
Article number158301
Pages (from-to)1-4
Number of pages4
JournalPhysical Review Letters
Volume91
Issue number15
DOIs
Publication statusPublished - 6 Oct 2003
MoE publication typeA1 Journal article-refereed

Keywords

  • current-biased dc SQUID
  • quantum tunneling

Fingerprint

Dive into the research topics of 'Evidence of two-dimensional macroscopic quantum tunneling of a current-biased dc SQUID'. Together they form a unique fingerprint.

Cite this