In order to enable an iCal export link, your account needs to have an API key created. This key enables other applications to access data from within Indico even when you are neither using nor logged into the Indico system yourself with the link provided. Once created, you can manage your key at any time by going to 'My Profile' and looking under the tab entitled 'HTTP API'. Further information about HTTP API keys can be found in the Indico documentation.
Additionally to having an API key associated with your account, exporting private event information requires the usage of a persistent signature. This enables API URLs which do not expire after a few minutes so while the setting is active, anyone in possession of the link provided can access the information. Due to this, it is extremely important that you keep these links private and for your use only. If you think someone else may have acquired access to a link using this key in the future, you must immediately create a new key pair on the 'My Profile' page under the 'HTTP API' and update the iCalendar links afterwards.
Permanent link for public information only:
Permanent link for all public and protected information:
Universality and conformal invariance in non-solvable Ising models
(Univ. Roma Tre)
Aula Seminari (LNF)
Via Enrico Fermi, 40
00044 Frascati (Roma)
In this talk, I will introduce a class of non-solvable 2D Ising models with nearest neighbor plus weak finite range interactions, and present two recent rigorous results about the theory at the critical point (joint work with R. Greenblatt and V. Mastropietro):
(1) Proof of the existence of the scaling limit for the multipoint energy correlations, as the lattice spacing goes to zero and the temperature goes to the critical one, with explicit bounds on the finite-mesh corrections. As expected, the limiting field theory defined by the set of the energy correlations coincides with the energy sector of the conformal field theory (CFT) with central charge c=1/2.
(2) Proof that the finite size corrections to the free energy at criticality are universal, in the sense that they are exactly independent of the interaction. The corresponding central charge, defined in terms of the coefficient of the first subleading term to the free energy, as proposed by Affleck and Blote-Cardy-Nightingale, is constant and equal to 1/2, in agreement with the result on the energy correlations.
In order to motivate these results, I will first review what is known or conjectured about the critical theory in the nearest neighbor 2D Ising model and in non-solvable versions of the same model. A digression about the CFT approach to the critical theory will be included.