2022 International Symposium on Electronics and Telecommunications (ISETC) Electronics and Telecommunications (ISETC), 2022 International Symposium on. :1-4 Nov, 2022
Botez, Robert, Pasca, Andres-Gabriel, and Dobrota, Virgil
2022 International Symposium on Electronics and Telecommunications (ISETC) Electronics and Telecommunications (ISETC), 2022 International Symposium on. :1-4 Nov, 2022
Constantin, Moldoveanu, Ionita, Irene, Popescu, Dan, Iacobici, Luca, Brezoianu, Virgil, Florea, Valentin, Schiopu, Vlad, and Stamatescu, Iulia
2022 International Conference and Exposition on Electrical And Power Engineering (EPE) Electrical And Power Engineering (EPE), 2022 International Conference and Exposition on. :007-012 Oct, 2022
Virgil, JoianRadu, Munteanu, Calin, and Manciula, Dorin Iosif
2022 International Conference and Exposition on Electrical And Power Engineering (EPE) Electrical And Power Engineering (EPE), 2022 International Conference and Exposition on. :440-444 Oct, 2022
Constantin, Moldoveanu, Ionita, Irene, Brezoianu, Virgil, and Florea, Valentin
2022 International Conference and Exposition on Electrical And Power Engineering (EPE) Electrical And Power Engineering (EPE), 2022 International Conference and Exposition on. :001-006 Oct, 2022
2022 International Conference and Exposition on Electrical And Power Engineering (EPE) Electrical And Power Engineering (EPE), 2022 International Conference and Exposition on. :521-526 Oct, 2022
Iurian, Calin-Marian, Botez, Robert, Ivanciu, Iustin-Alexandru, and Dobrota, Virgil
2022 21st RoEduNet Conference: Networking in Education and Research (RoEduNet) Networking in Education and Research (RoEduNet), 2022 21st RoEduNet Conference:. :1-5 Sep, 2022
Louie, Wing-Yue Geoffrey, Korneder, Jessica, and Zeigler-Hill, Virgil
2022 31st IEEE International Conference on Robot and Human Interactive Communication (RO-MAN) Robot and Human Interactive Communication (RO-MAN), 2022 31st IEEE International Conference on. :1044-1049 Aug, 2022
Sicoe, Andra-Flavia, Botez, Robert, Ivanciu, Iustin-Alexandru, and Dobrota, Virgil
2022 IEEE International Black Sea Conference on Communications and Networking (BlackSeaCom) Communications and Networking (BlackSeaCom), 2022 IEEE International Black Sea Conference on. :49-53 Jun, 2022
Margin, Dan-Andrei, Ivanciu, Iustin-Alexandru, and Dobrota, Virgil
2022 IEEE International Black Sea Conference on Communications and Networking (BlackSeaCom) Communications and Networking (BlackSeaCom), 2022 IEEE International Black Sea Conference on. :208-213 Jun, 2022
Condensed Matter - Superconductivity, Condensed Matter - Mesoscale and Nanoscale Physics, Condensed Matter - Strongly Correlated Electrons, and Nuclear Theory
Abstract
In recent years, reduced basis methods (RBMs) have been adapted to the many-body eigenvalue problem and they have been used, largely in nuclear physics, as fast emulators able to bypass expensive direct computations while still providing highly accurate results. This work is meant to show that the RBM is an efficient and accurate emulator for the strong correlations induced by the pairing interaction in a variety of finite systems like ultrasmall superconducting grains, interacting topological superfluids and mesoscopic hybrid superconductor-semiconductor devices, all of which require an expensive, beyond-mean-field, particle-number conserving description. These systems are modelled by the number-conserving Richardson pairing Hamiltonian and its appropriate generalizations. Their ground state is solved for exactly using the Density Matrix Renormalization Group. The reduced basis is assembled iteratively from a small number of exact ground state vectors, well-chosen from across the relevant parameter space using a fast estimate of the emulation error and a greedy local optimization algorithm. The reduced basis emulation is found to accurately describe the weak-to-strong pairing cross-over in small grains, the third-order topological phase transition of the interacting Richardson-Kitaev chain, and the complex charge stability diagram of a hybrid quantum dot - superconductor device. RBMs are thus confirmed to be cheap and accurate emulators for the widely encountered superconducting phenomena. Capable of providing orders of magnitude computational speed-up with respect to approaches based only on traditional many-body solvers, they open new possibilities in building and solving models of interacting many-body systems and in better interfacing them with experimental design and data analysis. Comment: 16 pages, 17 figures
Balaban, Georgiana, Lazaroiu, George Cristian, Dumbrava, Virgil, Golovanov, Nicolae, and Roscia, Mariacristina
2022 20th International Conference on Harmonics & Quality of Power (ICHQP) Harmonics & Quality of Power (ICHQP), 2022 20th International Conference on. :1-6 May, 2022