Browsing by Author "Raya, Alfredo"

Now showing 1 - 5 of 5
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    Optical conductivity and transparency in an effective model for graphene
    (2018) Falomir, Horacio; Loewe Lobo, Marcelo Patricio; Muñoz Tavera, Enrique; Raya, Alfredo
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    Strongly interacting matter in extreme magnetic fields
    (2024) Adhikari, Prabal; Ammon, Martin; Avancini, Sidney S.; Ayala, Alejandro; Bandyopadhyay, Aritra; Blaschke, David; Braghin, Fabio L.; Buividovich, Pavel; Cardoso, Rafael P.; Cartwright, Casey; Castaño-Yepes, Jorge David; Chernodub, Maxim N.; Coppola, Máximo; Das, Mayusree; Dutra, Mariana; Endrődi, Gergely; Fang, Jianjun; Farias, Ricardo L.S.; Fraga, Eduardo S.; Frazon, Arthur; Fukushima, Kenji; García-Muñoz, Juan D.; Garnacho-Velasco, Eduardo; Gomez Dumm, Daniel; Grieninger, Sebastian; Gulminelli, Francesca; Hernandez, Juan; Islam, Chowdhury Aminul; Kaminski, Matthias; Kotov, Andrey; Krein, Gastão; Li, Jing; Lo, Pok Man; Loewe, Marcelo; Lourenço, Odilon; Markó, Gergely; Marquez, Kau D.; Mizher, Ana; Mukhopadhyay, Banibrata; Muñoz, Enrique; Noguera, Santiago; Nunes, Rodrigo M.; Pais, Helena; Palhares, Letícia F.; Providência, Constança; Raya, Alfredo; Restrepo, Tulio; Rojas, Juan Cristóbal; Scoccola, Norberto N.; Scurto, Luigi; Sedrakian, Armen
    Magnetic fields are ubiquitous across different physical systems of current interest; from the early Universe, compact astrophysical objects and heavy-ion collisions to condensed matter systems. A proper treatment of the effects produced by magnetic fields during the dynamical evolution of these systems, can help to understand observables that otherwise show a puzzling behavior. Furthermore, when these fields are comparable to or stronger than ΛQCD , they serve as excellent probes to help elucidate the physics of strongly interacting matter under extreme conditions of temperature and density. In this work we provide a comprehensive review of recent developments on the description of QED and QCD systems where magnetic field driven effects are important. These include the modification of meson static properties such as masses and form factors, the chiral magnetic effect, the description of anomalous transport coefficients, superconductivity in extreme magnetic fields, the properties of neutron stars, the evolution of heavy-ion collisions, as well as effects on the QCD phase diagram. We describe recent theory and phenomenological developments using effective models as well as LQCD methods. The work represents a state-of-the-art review of the field, motivated by presentations and discussions during the “Workshop on Strongly Interacting Matter in Strong Electromagnetic Fields” that took place in the European Centre for Theoretical Studies in Nuclear Physics and Related Areas (ECT*) in the city of Trento, Italy, September 25-29, 2023
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    The QCD phase diagram from Schwinger-Dyson equations
    (2014) Gutierrez, Enif; Ahmad, Aftab; Ayala, Alejandro; Bashir, Adnan; Raya, Alfredo
    We study the phase diagram of quantum chromodynamics (QCD). For this purpose we employ the Schwinger-Dyson equations (SDEs) technique and construct a truncation of the infinite tower of equations by demanding a matching with the lattice results for the quark-anti-quark condensate at finite temperature (T), for zero quark chemical potential (mu), that is, the region where lattice calculations are expected to provide reliable results. We compute the evolution of the phase diagram away from T = 0. To chart the chiral symmetry restoration transition, we follow the evolution of the derivative of the condensate with respect to the temperature as a function of T and mu. The behavior of this thermodynamic variable clearly demonstrates the existence of a cross-over for mu less than a critical value. However, the derivative of the condensate with respect to the temperature develops a singularity near mu approximate to 0.22 GeV marking the onslaught of a first order phase transition characterized by the existence of a critical point. The critical line continues until mu approximate to 0.44 GeV where T-c = 0 and thus chiral symmetry is finally restored. For the deconfinement transition we look for the violation of the axiom of reflection positivity in the quark propagator. The critical end point appears to be the same as observed for the transition to chirally symmetric phase. However, near T = 0 axis, due to lack of data points, we are unable to claim against coincidental chiral symmetry restoration and deconfinement transitions along that axis.
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    Thermomagnetic correlation lengths of strongly interacting matter in the Nambu-Jona-Lasinio model
    (2017) Ayala, Alejandro; Hernández, L. A.; Loewe Lobo, Marcelo Patricio; Raya, Alfredo; Rojas, J. C.; Zamora Jofré, Renato Andrés
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    Thermomagnetic properties of the strong coupling in the local Nambu–Jona-Lasinio model
    (2016) Ayala, Alejandro; Domínguez, C. A.; Hernández, L. A.; Loewe Lobo, Marcelo Patricio; Raya, Alfredo; Rojas, J. C.; Villavicencio Reyes, Cristián Luis