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Fading of the polaron in a gas of bosons due to temperature effect: PhD student Gerard Pascual and professor Jordi Boronat of the research group Approaches to the first principles in condensed matter physics: quantum effects and complexity; have published a paper in the journal Physical Review Letters, where it is theoretically described how a polaron, the result of the interaction of an impurity with a gas of bosons in the condensation phase, disappears due to the effect of temperature
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New physical mechanism for the formation of transverse finger bars in beaches with abundant supply of sand: Albert Falqués and Francesca Ribas, from the group of Nonlinear fluid dynamics of the Physics Department, together with two other researchers from the UPC, have discovered a new morphodynamic instability mechanism that can explain the formation of alongshore-rhythmic systems of transverse finger bars that often develop at beaches with an abundant supply of sand, like those at El Trabucador beach, in the Ebro delta
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The new research on intrinsic correlation between the fraction of liquid-like zones and the beta-relaxation in high-entropy metallic glasses: Researchers Y. J. Duan, E. Pineda and D. Crespo, from the Group of Materials Characterization of the UPC, have made new progress to understand the mechanical properties of high-entropy metallic glasses. The work clarifies the correlation between the fraction of liquid-like zones, i.e. the fraction of atoms that can easily rearrange under the effect of external forces, and the secondary or β relaxation observed in these materials. Besides, the work reveals the high-entropy effect on the supercooled liquid dynamics of the metallic melt.
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Innovative methods for selectively fragmenting molecules with laser X-rays are proposed: Carles Serrat Jurado, a professor in the Department of Physics at the UPC, has demonstrated in research that the interior of a molecule can be modified locally and selectively by applying hard X-ray lasers. The work has been published in the reference scientific journal 'The Journal of Physical Chemistry'
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Raúl Bombín Escudero defends his thesis on dipolar systems in the degenerate quantum regimen: Raúl Bombín Escudero defended his thesis, co-directed by Jordi Boronat Médico and Fernando Pablo Mazzanti Castrillejo on December 13 on the North Campus titled "Ultracold bose and fermi dipolar gases: a quantum Monte Carlo study", the thesis presents a study on dipolar systems in the degenerate quantum regimen.
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Improving performance of racetrack microtrons: Yuri Kubyshin from NEMEN research group along with physicists from the Skobeltsyn Institute of Nuclear Physics of the Moscow State University have published a paper devoted to an analysis of beam dynamics in electron accelerators of the racetrack microtron (RTM) type and searching for improvements of their characteristics.
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Thesis with key insights on climate change is defended in the C&AP Ph.D. program: Dario Zappalà defended his work last April on air temperature dynamics and climate change under the direction of Cristina Masoller in the Nonlinear Dynamics, Nonlinear Optics and Lasers group.
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Hadrien Calmet defends his thesis on fluid dynamics during a short and rapid inhalation (also called sniff) in the airways: Hadrien Calmet will defend his thesis directed by Dr. Guillaume Houzeaux and tutored by Dr. Daniel Calvete at the campus nord. Titled “Large-scale CFD and micro-particle simulations in a large human airways under sniff condition and drug delivery application,” the thesis presents results that set a precedent for large-scale airway simulations and provide a better understanding of the mechanisms. physiological
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Raúl Sáez García defends his thesis on air traffic management: Raúl Sáez García defended his thesis directed by Xavier Prats i Menéndez on October 1, 2021 at the Baix Llobregat Campus. Titled "Traffic Synchronization with Controlled Time of Arrival for Cost-Efficient Trajectories in High-Density Terminal Airspace", the thesis proposes a series of methods and concepts of operations with the aim of improving the efficiency of air operations in airspace terminal.
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Discovery of a neutron star that behaves like a black hole: An international scientific team, in which Yuri Cavecchi, from the physics department of the UPC has participated, and led by the Instituto de Astrofísica de Canarias (IAC), has found a neutron star that steals matter from a companion star in a violent and unstable. This process, previously only observed in black holes. The study is published in the journal Nature.
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