Volume 83, Number 2, July 2008
|Number of page(s)||5|
|Section||The Physics of Elementary Particles and Fields|
|Published online||07 July 2008|
Topological order in frustrated Josephson junction arrays
INFN and Dipartimento di Fisica, University of Perugia - via A. Pascoli, I-06100 Perugia, Italy, EU
2 SwissScientific.com - ch. Diodati 10, CH-1223 Cologny, Switzerland
Accepted: 2 June 2006
We show that electrically and magnetically frustrated Josephson junction arrays (JJAs) realize topological order with a non-trivial ground-state degeneracy on manifolds with non-trivial topology. The low-energy theory has the same gauge dynamics of the unfrustrated JJAs but for different, “fractional" degrees of freedom, a principle reminescent of Jain's composite electrons in the fractional quantum Hall effect.
PACS: 11.10.-z – Field theory / 74.20.Mn – Nonconventional mechanisms (spin fluctuations, polarons and bipolarons, resonating valence bond model, anyon mechanism, marginal Fermi liquid, Luttinger liquid, etc.) / 05.30.Pr – Fractional statistics systems (anyons, etc.)
© EPLA, 2008
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