Speaker
Daniel Ueltschi
(University of Warwick)
Description
I will review correlation inequalities for the two-point function of classical and quantum spin systems. These inequalities are “geometric” when they involve lattice sites. I will review the Simon-Lieb-Rivasseau, Messager-Miracle-Sole, and Lees-Taggi inequalities. I will point out that the Messager-Miracle-Sole inequalities can be extended to the spin-1/2 quantum XY model.