Quantum States of a Mesoscopic SQUID measured using a Small Josephson Junction

René Lindell, Jari Penttilä, Mika Sillanpää, Pertti Hakonen

Research output: Contribution to journalArticleScientificpeer-review

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Abstract

We have experimentally studied the energy levels of a mesoscopic superconducting quantum interference device (SQUID) using inelastic Cooper-pair tunneling. The tunneling in a small Josephson junction depends strongly on its electromagnetic environment. We use this fact to do energy-level spectroscopy of a SQUID loop by coupling it to a small junction. Our samples with strong quasiparticle dissipation are well described by a model of a particle localized in one of the dips in a cosine potential, while in the samples with weak dissipation we can see formation of energy bands.
Original languageEnglish
Article number052506
Pages (from-to)1-4
Number of pages4
JournalPhysical Review B
Volume68
Issue number5
DOIs
Publication statusPublished - 2003
MoE publication typeA1 Journal article-refereed

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