The programme is the following (please, note that the schedule is approximate; we kindly ask you to come to the full session if at all possible, since some flexibility in the schedule is unavoidable):
15:00: Quantum fields in gravitation.
by Sergi Nadal
Abstract: From the quantum theory, we know that all kinds of matter describing the microcosmos are given by quantum fields. On the other hand, General Relativity describes the physics of the macrocosmos including the shape of space and time. Can we describe the quantum theory in a gravitational context ? What can we learn from it?
In this talk, I will review the quantization of a simple harmonic oscillator, paying special attention to the structures that are essential to extend the quantization of fields in Gravitation. I will illustrate the crucial role that symmetries play in a flat space-time. Finally, I will show how particles can be created out of the vacuum due to an expanding universe.
15:45: Quantum effects in Black holes.
by Pau Beltrán
Abstract: Black holes are one of the most fascinating predictions of the theory of General Relativity. But, which is the roll of quantum physics in this astrophysical objects? The phenomenon of Hawking radiation shows how the inclusion of quantum fields can change drastically the nature of black holes. Moreover, quantum effects allow the possibility that the black holes that we observe could actually be other kind of objects, such as ultra-compact stars or worm-holes.
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16:30-17:00 -> Coffee Break
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17:00: Boson stars and modified gravity.
by Andreu Masó
Boson stars are astrophysical objects formed out of bosonic particles. On the other hand, several gravitational theories (known as modified gravity) have been presented in order to bypass the limitations that the theory of General Relativity presents. We study boson stars in the context of a modified gravity scenario.
Nicolás Loayza y Omar Medina