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Quantum Ratchet Effect for Vortices

DOI to cite this document:
10.5283/epub.9473
Majer, J. B. ; Peguiron, J. ; Grifoni, Milena ; Tusveld, M. ; Mooij, J. E.
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Date of publication of this fulltext: 18 Sep 2009 09:16



Abstract

We have measured a quantum ratchet effect for vortices moving in a quasi-one-dimensional Josephson junction array. In this solid-state device the shape of the vortex potential energy, and consequently the band structure, can be accurately designed. This band structure determines the presence or absence of the quantum ratchet effect. In particular, asymmetric structures possessing only one band ...

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