Research Group:
Speaker:
Costanza Benassi
Institution:
Warwick
Schedule:
Thursday, January 26, 2017 - 09:30 to 11:00
Location:
A-136
Abstract:
The decay of correlation functions provides a great deal of information about the phase diagram of lattice systems. McBryan and Spencer proved that the two-point function decays as a power-law in the 2D classical XY model. Koma and Tasaki proved it for the quantum Hubbard model. In this talk I will discuss a recent generalisation of this result to a wide class of 2d quantum lattice systems with U(1) symmetry. Based on a joint work in collaboration with J. Fröhlich and D. Ueltschi (arXiv:1612.02478 (2016)).