| Biography | |
|---|---|
 Prof. David Laroze Universidad de Tarapacá, Chile |
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| Title: Two-dimensional composite solitons in a spin-orbit-coupled fermi gas in free space | |
| Abstract: We address a possibility of creating soliton states in oblate binary-fermionic clouds in the framework of the density-functional theory, which includes the spin-orbit coupling (SOC) and nonlinear attraction between spin-up and down-polarized components of the spinor wave function [1]. In the limit when the inter-component attraction is much stronger than the effective intra-component Pauli repulsion, the resulting model also represents a system of Gross-Pitaevskii equations for a binary Bose-Einstein condensate including the SOC effect [2]. We show that the model gives rise to two-dimensional quiescent composite solitons in free space. A stability region is identified for solitons of the mixed-mode type (which feature mixtures of zero-vorticity and vortical terms in both components), while solitons of the other type, semi-vortices (with the vorticity carried by one component) are unstable. Due to breaking of the Galilean invariance by SOC, the system supports moving solitons with velocities up to a specific critical value. Collisions between moving solitons are briefly considered too. The collisions lead, in particular, to a quasi-elastic rebound, or an inelastic outcome, which features partial merger of the solitons. References 1.P. Diaz, D. Laroze, A. Avila, B. A. Malomed, Commun. Nonlinear Sci. Numer. Simulat. 70 (2019) 372. B. A. Malomed, EPL 122 (2018) 36001; and references therein. | |
| Biography: David Laroze is Full Professor at the University of Tarapacá (Chile). He is the Director of the Institute for Advanced Studies at the University of Tarapacá, and he holds the Chair of Mathematical Modeling. Previously, he was a Research Associate at the Physics and Astronomy School at the University of Glasgow (United Kingdom), a Postdoctoral Researcher at the Max Planck Institute for Polymer Research (Germany), Postdoctoral Researcher at the University of Chile (Chile) and an Assistant Professor at the Pontifical Catholic University of Valparaiso (Chile). He holds a Ph.D. in Physics from the Federico Santa Maria Technical University (Chile) and was the best student of his generation awarded the first class of Bachelor in Physics in 2002. He has published more than a hundred manuscripts in journals and conference proceedings, including 99 articles in journals indexed in the Web of Science – Journal Citation Reports such as Macromolecules, Scientific Reports, Physical Review B, Nanotechnology, Atmospheric Research, Plos One, Journal of Chemical Physics, Communication in Nonlinear Science and Numerical Simulations, Physical Review E, International Journal of Heat and Mass Transfer. He has been the advisor of several Bachelor and Ph.D. students as well as the mentor of Postdoctoral Researchers. He has participated in the scientific and in the organizing committee of national and international conferences and serves as a reviewer in many international journals. He has been obtained several grants as Principal Investigator as well as a co-Investigator. Nowadays, he is a member of the Chilean Center for Nanoscience and Nanotechnology and Editorial Board member of the journal Current Research in Nanotechnology & Nanoscience. Currently, he is interested in nonlinear phenomena, magnetism, radiation problems, hydrodynamic instabilities, and thermal and electronic transport in quantum systems. | |
