July 18, 2024
Title: (Quantum) frame covariance in gauge systems and gravity Abstract: Recent years have seen a resurging interest in dynamical reference frames in quantum foundations, gauge theories and gravity. I will discuss some of these developments by drawing connections between the different fields. For example, I will discuss how the so-called `paradox of the third particle’ in quantum foundations can be resolved by understanding it from the perspective of boundaries in gauge theories. Conversely, I will comment on how one can understand aspects of edge modes in finite region gauge theories from the point of view of reference frames. More generally, I will explain how quantum frame covariance leads to a quantum relativity of subsystems, which entails that the notion of subsystem locality becomes dependent on the choice of frame, as do associated physical properties such as correlations and entropies. I will suggest implications of this for the interpretation of gauge-invariant observables in gauge theories and gravity. Speaker: Professor Philipp Andres Hoehn, Qubits and Spacetime Unit , Okinawa Institute of Technology (OIST), Okinawa, Japan. Date and Time: 16th August 2021, 6.30 PM to 9.00 PM India time (3:00 PM to 5.30 PM Berlin time).