<< January 2015 >>
 
 >>
 >>
 >>
 >>
 >>
Sun Mon Tue Wed Thu Fri Sat
   1   2   3 
 4   5   6   7   8   9   10 
 11   12   13   14   15   16   17 
 18   19   20   21   22   23   24 
 25   26   27   28   29   30   31 
 
Add an Event Edit This Event

Events at Physics

<< Fall 2014 Spring 2015 Summer 2015 >>
Subscribe to receive email announcements of events
R. G. Herb Condensed Matter Seminar
Faculty Candidate Seminar
Noise in superconducting circuits: microscopic theory and open questions
Date: Thursday, January 29th
Time: 4:00 pm
Place: 4274 Chamberlin
Speaker: Lara Faoro, Laboratoire de Physique Theorique et Hautes Energies
Abstract: I review the main sources of noise in superconducting circuits: charge noise, critical current noise, quasiparticle poisoning and flux noise. I discuss the microscopic mechanism for these noises and show that charge and critical current noise are accounted for by the microscopic model that assumes the presence of localized electron states at the Superconductor Insulator interfaces. Due to the large electron electron interaction these states form resonances close to the Fermi surface. These states serve as traps where the quasiparticles live for a long time. The spins of the quasiparticles in these states produce flux noise of the right magnitude and frequency dependence. However the correlation between the magnetization and susceptibility noise observed by R. McDermott remains unexplained.
Host: Coppersmith
Add this event to your calendar

©2013 Board of Regents of the University of Wisconsin System