糖果派对

Speaker: 脕lvaro 脕lvarez-Dom铆nguez, PhD student at IFT (Istitudo de Fisica Teorica), Madrid. 脕lvaro has worked mainly on topics related to Quantum Field Theory, and on Wednesday he is going to talk about his recent paper on quantum superradiance phenomena in curved spacetime.  More information is reported below.

Abstract: Unlike a classical charged bosonic field, a classical charged fermion field on a static charged black hole does not exhibit superradiant scattering. We demonstrate that the quantum analogue of this classical process is however present. We construct a vacuum state for the fermion field which has no incoming particles from past null infinity, but which contains, at future null infinity, a nonthermal flux of particles. This state describes both the discharge and energy loss of the black hole, and we analyze how the interpretation of this phenomenon depends on the ambiguities inherent in defining the quantum vacuum.

Location: 
You can also (passcode: 060379).

The event is open to all.