"Solitonic ground states in (color-) superconductivity"

Presented by Dominik Nickel, MIT

Tuesday, January 20, 2009, 2:00 pm — Small Seminar Room, Bldg. 510

Inhomogeneous ground states due to imbalanced Fermi surfaces have been discussed in various contexts. The investigation of these so-called LOFF states has usually been constrained to simple ansaetze or the Ginzburg-Landau approximation.
By the example of an NJL-type model I discuss new features when going beyond the Ginzburg-Landau approximation, in particular the emergence of a soliton lattice. Concentrating on one-dimensional periodic structures in 3+1 dimensions I present properties of the ground state and contrast them with known results. I also give an account on the weak-coupling limit.