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:
Recent experiments have found an universal value for the dynamic conductivity in graphene, fully confirming theoretical predictions based on a non interacting tight binding model. This however poses a problem since one could expect a many body renormalization of the non interacting value of the conductivity due to the interaction. In the case of fermions on the honeycomb lattice with Hubbard interactions we have proved a theorem, related to the Adler-Bardeen non renormalization of the anomalies, ensuring that all the interaction corrections to the conductivity are exactly vanishing, even if the wave function renormalization and the Fermi velocity acquire finite renormalizations. In the case of interaction with the e.m. field, the wave function renormalization is infinite but again, at least at lowest order in the renormalized
expansion, the interaction corrections to the conductivity are vanishing. Extensions to bilayer graphene will be also discussed.