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"Bose-Einstein Condensation in Josephson Junctions Arrays: Experiments"

Relatore: Matteo Cirillo- Minas-Lab and Dipartimento di Fisica UniversitÓ di Roma

Aula Maxwell
26 Febbraio 2013 ore 15.00

Measurements performed on superconductive networks shaped in the form of planar graphs display anomalously large currents when specific branches are biased. The temperature and magnetic field dependence of these currents evidence that their origin is due to Cooper pair tunnelling through the Josephson junctions connecting the superconductive islands of the array. The data are compared with the results of a theoretical model which predicts, for the system under consideration, an inhomogeneous Cooper pair distribution on the superconductive islands of the network as a consequence of Bose-Einstein condensation.