ONE DIMENSIONAL FERMI GAS
with spin and attractive interaction
Contributed by: G. Gallavotti (Roma 1),
Nov. 6, 1998.
the large distance behavior for the single particle
reduced density matrix in the case of attractive interaction is still
an open problem. It is a simple example of a problem in which the
renormalization group approach fails because the large distance
behavior is dictated by a nontrivial fixed point. This may be the one
case in which a theory is possible and there are many claims about what
it should look like.