4e-condensation in a fully frustrated Josephson junction diamond chain

Details 4e-condensation in a fully frustrated Josephson junction diamond chain 4e-condensation in a fully frustrated Josephson junction diamond chain

2005-11-17

arxiv.org/abs/cond-mat/0511423v1

Phys. Rev. B 73, R100502 (2006)

Physics

Condensed Matter

Superconductivity

5 pages, 7 figures

Scientific paper

10.1103/PhysRevB.73.100502

Fully frustrated one-dimensional diamond Josephson chains have been shown [B. Dou\c{c}ot and J. Vidal, Phys. Rev. Lett. {\bf 88}, 227005 (2002)] to posses a remarkable property: The superfluid phase occurs through the condensation of pairs of Cooper pairs. By means of Monte Carlo simulations we analyze quantitatively the Insulator to $4e$-Superfluid transition. We determine the location of the critical point and discuss the behaviour of the phase-phase correlators. For comparison we also present the case of a diamond chain at zero and 1/3 frustration where the standard $2e$-condensation is observed.

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