Nace en La Ñora en 1985. En 2008 obtiene la licenciatura en Física por la Universidad de Murcia. A continuación cursa el Máster en Física Fundamental Especialidad en Física Teórica en la Universidad de Valencia, obteniendo el título de máster en el año 2009. Entre 2009 y 2013 desarrolló su tesis doctoral "Gaugings and other aspects in supergravity" en el Departamento de Física de la facultad de Química de la Universidad de Murcia, bajo la dirección del Dr. Emilio Torrente Luján, obteniendo el grado de doctor en 2013 por la Universidad de Murcia. Posteriormente, desarrolló su periodo posdoctoral en la Universidad de Buenos Aires en 2014 en colaboración con los investigadores Gastón Giribet y Carmen Núñez, en la Universidad de Harvard (con el apoyo de una beca posdoctoral de la Fundación Séneca) entre los años 2014 y 2016 junto al grupo de investigación de Física de Altas Energías en colaboración con el investigador Cumrun Vafa, en el "Yukawa Institute for Theoretical Physics", de la Universidad de Kioto entre los años 2016 y 2018 junto al grupo de investigación de Teoría de Cuerdas en colaboración con el investigador Shigeki Sugimoto. En el año 2016 obtuvo un contrato Saavedra Fajardo de la Fundación Séneca para reincorporarse a unos de los centros de investigación de la Región de Murcia, siendo el destino elegido el grupo FISPAC (Física de Partículas, Astrofísica y Cosmología) de la Universidad de Murcia donde desarrolla su proyecto investigador "Non-geometric fluxes: Cosmology and Dual Holography" y participa en actividades docentes. Paralelamente está asociado al desarrollo de los proyectos de investigación "Gravedad, teorías gauge y supergravedad, ondas gravitacionales" (Ministerio de Ciencia y Tecnología), "Non-geometric fluxes: cosmology and holography" (Japanese Society for the Promotion of Science) y es miembro de la Red Temática de Relatividad y Gravitación.
Física ,Espacio, Ciencias de la tierra ,Tecnología de los materiales
Departamento de Física
The project “Non-geometric fluxes: cosmology and dual holography” addresses some of the most relevant and promising problems in string/M-theory and Cosmology: the study of vacua associated to non-geometric flux compactifications and the understanding of very novel holographic problems.
The landscape of String Theory (ST) is believed to be made of 10^500 vacua, having some of them properties that are similar to those of our Universe. The existence of these vacua can explain some of the hardest problems in Cosmology and High Energy Physics: the cosmological constant problem, the hierarchy problem, and the almost-flatness of the inflation potential.
To give a description of our Universe from ST, we need to do a compactification from 10 to 4 dimensions. Depending on the choice of the internal 6D geometry, our Universe will exhibit different properties. Recently, some examples of de Sitter (dS) universe (the one that resembles our Universe) have been obtained from non-geometric flux compactification. Non-geometric flux compactification are ST solutions that have no description in terms of a conventional 6D geometry, as for example
asymmetric orbifolds.
Within the space of possible solutions, one expects that the ST landscape should be mostly populated by non-geometric backgrounds. However, despite of their relevance, some important questions about non-geometric flux compactification are still unknown. One reason people focused more on geometric backgrounds is because they are technically more under control than the non-geometric ones. For example, no-go theorems against the existence of dS vacua, as Maldacena-Núñez, do not apply to non-geometric fluxes. Nevertheless, the dS solutions found at tree level whose stability has not been disproven so far, require them.
Based on recently theoretical developments, we propose two strategies to shed light on the current understanding and technical control of non-geometric backgrounds. Firstly, Double/Exceptional Field Theories (DFT/EFT) give a criterion to distinguish the lower dimensional supergravities (SUGRAs) that have a (non-)geometric origin. We will make use of these duality symmetric theories to classify the arena of (non-)geometric vacua. Secondly, we want to test and use the Weak Gravity (WGC) and the recent Ooguri-Vafa (OVC) conjectures on the solutions of gauged SUGRAs. These conjectures provide a principle to rule out the vacua that do not have a stringy origin and belong to the “swampland”. The recent progress on the α'-corrected DFT and gauged SUGRAs will allow us to study non-perturbatively the stability of these vacua.
A determinar
1) Duality orbits of non-geometric fluxes.
By G. Dibitetto, J.J. Fernandez-Melgarejo, D. Marques, D. Roest.
[arXiv:1203.6562 [hep-th]].
10.1002/prop.201200078.
Fortsch.Phys. 60 (2012) 1123-1149.
2) Weaving the Exotic Web.
By Jose J. Fernandez-Melgarejo, Tetsuji Kimura, Yuho Sakatani.
[arXiv:1805.12117 [hep-th]].
3) Supersymmetric Gauge Theory with Space-time-Dependent Couplings.
By Jaewang Choi, Jose J. Fernandez-Melgarejo, Shigeki Sugimoto.
[arXiv:1710.09792 [hep-th]].
10.1093/ptep/ptx181.
PTEP 2018 (2018) no.1, 013B01.
4) The Odd story of α′-corrections.
By Walter H. Baron, Jose J. Fernandez-Melgarejo, Diego Marques, Carmen Nunez.
[arXiv:1702.05489 [hep-th]].
10.1007/JHEP04(2017)078.
JHEP 1704 (2017) 078.
5) A New Approach to Non-Abelian Hydrodynamics.
By Jose J. Fernandez-Melgarejo, Soo-Jong Rey, Piotr Surówka.
[arXiv:1605.06080 [hep-th]].
10.1007/JHEP02(2017)122.
JHEP 1702 (2017) 12
