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:
Many of the long-standing mysteries in theoretical physics today are, in one way or another, related to gravity. This fact is a very powerful motivation for trying to improve our knowledge on gravitational interactions and plausible extensions of general relativity, in particular to understand their consistency with basic physical principles like unitarity, locality and causality. In this talk I will show how such fundamental principles lead to positivity constraints on scattering amplitudes in theories with a massless graviton in the spectrum in four spacetime dimensions, and how they allow us to tackle current puzzles in quantum gravity and modified gravity theories. For instance, these new bounds imply that extremal black holes are self-repulsive, thus providing an S-matrix proof of the celebrated weak gravity conjecture. I will also discuss how these bounds affect modifications of gravity relevant for cosmology, as well as some future directions of investigation.