I am Javier, a humble physics master of science student in Universidad de Chile. Until 2023 I was member of the Holographycl Anillo group and currently I'm part of Cosmology and Theoretical Astrophysics FCFM group.
In this webpage you can find: personal notes, research stuff, and FI2001, FI2002, FI3111, and FI7011 (FCFM) T.A. course material.
Advisor: Gonzalo Palma and Spyros Sypsas
This paper extends our previous work by employing the Wavefunction of the Universe approach to compute n-point correlation functions in a single-field inflation model. We show that while WFU coefficients do not exhibit IR divergences, appropriate loop resummation recovers the known results, including both UV and IR divergences.
Advisor: Gonzalo Palma and Spyros Sypsas
Using a single-field inflation model with an arbitrary potential, we compute n-point correlation functions. Considering Witten diagrams up to first order in vertices and arbitrary number of loops, we regularize them using dimensional regularization and Wilsonian approach, showing that no time-dependent terms arise in the correlation functions.
Advisor: Gonzalo Palma and Claudio Muñoz
Due to particle creation in time-dependent inflation, it is useful to describe a multi-field model using Bogoliubov transformations. The resulting coefficients satisfy a first-order differential system, which we aim to solve analytically. This will enable a complete non-perturbative computation of the primordial power spectrum. I presented my results in CosmoSur VI conference.
Advisor: Alberto Faraggi
Inspired by the BTZ black hole, we use Chern-Simons theory in 2+1 dimensions to study the thermodynamics of black holes in AdS space. We calculate the associated charges and, through numerical methods, demonstrate that these charges undergo phase transitions and exhibit critical points.
Advisor: Andrés Escala
Using the RAMSES and RAMSES-RT codes, we performed large-scale simulations of SMBHB merger evolution, considering interactions of BHs with the circumbinary gas disk and AGN feedback. We identify the conditions necessary for the merger to occur, and, in that case, we estimate the time required for the process.
Advisor: Aníbal Sierra
We study the formation of structures in protoplanetary disks during their early evolution, focusing on the interactions among dust particles of varying sizes and distributions. To do this, we analyze dust dynamics analytically and create computer models of luminosity and optical density to simulate observations with the ALMA observatory.
"This school provides an introduction to the current state of research in cosmology and astroparticle physics. It is intended for beginning graduate students, as well as more senior non-expert researchers interested in the field."
"School aimed at outstanding undergraduates in their last year from all countries in Latin America. It is associated with a partnership between ICTP-SAIFR at IFT-UNESP and the Perimeter Institute for Theoretical Physics."
International conference where I presented the poster of my internship.
I have given talks in different universities/activities:
PERIMETER-SAIFR - SAO PAULO 2022
COSMOSUR - CORDOBA 2022
COSMOCONCE - CONCEPCIÓN 2023
ICTP SCHOOL - ITALY 2024
INSTITUT d'ASTROPHYSIQUE DE PARIS VISIT - FRANCE 2024
AMSTERDAM AND LEIDEN - NETHERLANDS 2024
CACHUPINES