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Explore the intricacies of the Feynman propagator on curved spacetimes in this comprehensive lecture by Prof. Jan Dereziński from the Faculty of Physics at the University of Warsaw. Delve into various definitions of the Feynman propagator, including operator-theoretic and out-in approaches, and examine its application in Quantum Field Theory. Investigate diverse spacetime examples such as stationary, asymptotically stationary, FLRW, deSitter, and anti-deSitter. Gain insights into both stable and tachyonic cases, drawing from joint research with Christian Gass. Presented as part of the Wednesday colloquium series at the Center for Theoretical Physics of the Polish Academy of Sciences, this 69-minute talk offers a deep dive into advanced concepts in theoretical physics.
