Condensed Matter Physics, 2013, vol. 16, No. 3, p. 33801:111
DOI:10.5488/CMP.16.33801
arXiv:1111.3671
Title:
Merging diabolical points of a superconducting circuit
Author(s):

R. Leone
(Statistical Physics Group, Institut Jean Lamour, UMR CNRS 7198, Université de Lorraine, BP 70239, F54506 Vand\oe uvrelèsNancy Cedex, France)
,


A. Monjou
(Statistical Physics Group, Institut Jean Lamour, UMR CNRS 7198, Université de Lorraine, BP 70239, F54506 Vand\oe uvrelèsNancy Cedex, France)

We present the first theoretical study of the merging of diabolical points in the context of superconducting circuits. We begin by studying an analytically solvable fourlevel model which may serve as theoretical pattern for such a phenomenon. Then, we apply it to a circuit named Cooper pairs pump, whose diabolical points are already known.
Key words:
Cooper pairs pump, diabolical points, degeneracies, merging
PACS:
85.25.Cp, 74.50.+r, 74.78.Na, 03.67.a
