I.F.T.
Almuerzo-Seminario
(Lunch seminar)
May 16th 2000, 15:00 p.m.
Conformal Field Theory and the Exact Solution of the BCS Hamiltonian
Germán Sierra
(IMAFF, CSIC)
The reduced BCS Hamiltonian was solved exactly by Richardson in 1963
and its integrability was proved recently. This exact solution has
been largely ignored by the physics community until the recent
developments in the study of superconducting grains with nanoscopic size.
In this talk we shall present the connection between the Richardson's
exact solution and Conformal Field Theory (CFT), which gives a unified
approach to this problem. The relevant CFT is given by the
SU(2) Wess-Zumino-Witten model in the limit where the level k goes
to minus infinity. The construction is reminiscent of the CFT approach
to the Fractional Quantum Hall effect.
Where: Modulo C-XVI, 3rd floor,
Facultad de Ciencias U.A.M., C.U. Cantoblanco, 28049-Madrid
For more information about seminars at the I.F.T. e-mail
José Ramón Espinosa
or phone +34-91-397 4418.
Last modified: Fri Apr 7 10:00:55 CEST 2000