| Issue |
EPL
Volume 83, Number 2, July 2008
|
|
|---|---|---|
| Article Number | 21003 | |
| Number of page(s) | 5 | |
| Section | The Physics of Elementary Particles and Fields | |
| DOI | https://doi.org/10.1209/0295-5075/83/21003 | |
| Published online | 07 July 2008 | |
Topological order in frustrated Josephson junction arrays
1
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
Corresponding authors: cristina.diamantini@pg.infn.it pasquale.sodano@pg.infn.it ca.trugenberger@bluewin.ch
Received:
14
February
2008
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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