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.
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The double copy is a method for constructing scattering amplitudes in gravity from scattering amplitudes in gauge theory, perturbatively around Minkowski space. This method has been very useful in the study of perturbative supergravity at high loop orders, and even has a catchy slogan: Gravity = (Gauge theory)^2. However, it is not known if the double copy is an intrinsic feature of gauge theory and gravity as perturbative QFTs or just a (highly effective) trick that happens to work in Minkowski space. In this talk I will describe how the robustness of the double copy can be tested by considering the simplest scattering amplitudes in the simplest non-flat backgrounds; namely, 3-point amplitudes on plane wave backgrounds. Despite various subtleties introduced by the non-trivial scattering background, it is clear that a notion of double copy does indeed exist.