2 papers
cond-mat.stat-mech2000
Renormalization Group, hidden symmetries and approximate Ward identities in the XYZ model, II
G. Benfatto, V. Mastropietro
An expansion based on renormalization group methods for the spin correlation function in the z direction of the Heisenberg-Ising XYZ chain with an external magnetic field directed…
cond-mat.stat-mech1998
Peierls instability for the Holstein model
G. Benfatto, G. Gentile, V. Mastropietro
We consider the static Holstein model, describing a chain of Fermions interacting with a classical phonon field, when the interaction is weak and the density is a rational number.…