@article {2006,
	title = {4e-condensation in a fully frustrated Josephson junction diamond chain},
	journal = {Phys. Rev. B 73 (2006) 100502(R)},
	number = {arXiv.org;cond-mat/0511423v1},
	year = {2006},
	abstract = {<p>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.</p>},
	doi = {10.1103/PhysRevB.73.100502},
	url = {http://hdl.handle.net/1963/2400},
	author = {Matteo Rizzi and Vittorio Cataudella and Rosario Fazio}
}
