Tues. seminar

[CM ICTP - Trieste]

JOINT ICTP/SISSA STATISTICAL PHYSICS SEMINAR





Tuesday, 10 March    -    12:30 hrs.



Lecture Room 'D' - SISSA Main Building



D. GIULIANO    ( Università di Cosenza )



"Phase diagram of a  Y-shaped Josephson junction network"



Abstract



It is shown that, for pertinent values of the fabrication and control  
parameters, an attractive finite coupling fixed point emerges in the  
phase diagram of a Y-junction of superconducting Josephson chains.   
The new fixed point arises only when the dimensionless flux f   
piercing the central loop of the network equals \pi.  A detailed  
account of the Josephson current-phase relationship along the arms of  
the network, near each one of the allowed fixed points, is provided.   
The results evidence remarkable similarities between the phase  
diagram accessible to a Y-junction of superconducting Josephson  
chains and the one found in the analysis.