Fluxonium: Single cooper-pair circuit free of charge offsets

Vladimir E. Manucharyan, Jens Koch, Leonid I. Glazman, Michel H. Devoret

Research output: Contribution to journalArticlepeer-review

282 Scopus citations


The promise of single Cooper-pair quantum circuits based on tunnel junctions for metrology and quantum information applications is severely limited by the influence of offset charges: random, slowly drifting microscopic charges inherent in many solid-state systems. By shunting a small junction with the Josephson kinetic inductance of a series array of large-capacitance tunnel junctions, thereby ensuring that all superconducting islands are connected to the circuit by at least one large junction, we have realized a new superconducting artificial atom that is totally insensitive to offset charges. Yet its energy levels manifest the anharmonic structure associated with single Cooper-pair effects, a useful component for solid-state quantum computation.

Original languageEnglish (US)
Pages (from-to)113-116
Number of pages4
Issue number5949
StatePublished - 2009

ASJC Scopus subject areas

  • General

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