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Observation of macroscopic quantum tunneling through the Coulomb energy barrier

  • Delft University of Technology

Research output: Contribution to journalArticlepeer-review

113 Scopus citations

Abstract

The conductance of linear arrays of two and three normal-metal small tunnel junctions is studied for bias voltages V below the Coloumb-blockade threshold. At low temperature, we find evidence for macroscopic quantum tunneling of the electric charge (q-MQT) through the Coulomb energy barrier. For double junctions the tunneling rate scales as V3, and approximately as the product of the junction conductances, as predicted by the theory of inelastic q-MQT.

Original languageEnglish
Pages (from-to)3037-3040
Number of pages4
JournalPhysical Review Letters
Volume65
Issue number24
DOIs
StatePublished - 1990

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