Formation of spiral dwarf galaxies: observational data and results of numerical simulation

Autor: Khrapov, Sergey, Khoperskov, Alexander, Zaitseva, Natalia, Zasov, Anatoly, Titov, Alexander

Publikováno v: St. Petersburg State Polytechnical University Journal. Physics and Mathematics, 2023, v.16 (1.2), pp.395-402

Recent studies show the possibility of the formation of fairly regular and global spiral patterns in dwarf galaxies (dS type). Our sample of observed dwarf objects of this class also includes galaxies with a central stellar bar. The analysis of the o

Externí odkaz: http://arxiv.org/abs/2307.15925

Optimization in complex spaces with the Mixed Newton Method

Autor: Bakhurin, Sergey, Hildebrand, Roland, Alkousa, Mohammad, Titov, Alexander

We propose a second-order method for unconditional minimization of functions $f(z)$ of complex arguments. We call it the Mixed Newton Method due to the use of the mixed Wirtinger derivative $\frac{\partial^2f}{\partial\bar z\partial z}$ for computati

Externí odkaz: http://arxiv.org/abs/2207.04265

Adaptive Algorithms for Relatively Lipschitz Continuous Convex Optimization Problems

Autor: Stonyakin, Fedor, Titov, Alexander, Alkousa, Mohammad, Savchuk, Oleg, Gasnikov, Alexander

Recently there were proposed some innovative convex optimization concepts, namely, relative smoothness [1] and relative strong convexity [2,3]. These approaches have significantly expanded the class of applicability of gradient-type methods with opti

Externí odkaz: http://arxiv.org/abs/2107.05765

Rise and fall of laser-intensity effects in spectrally resolved Compton process

Autor: Acosta, Uwe Hernandez, Titov, Alexander I., Kämpfer, Burkhard

The spectrally resolved differential cross section of Compton scattering, $d \sigma / d \omega' \vert_{\omega' = const}$, rises from small towards larger laser intensity parameter $\xi$, reaches a maximum, and falls towards the asymptotic strong-fiel

Externí odkaz: http://arxiv.org/abs/2105.11758

Conceptual Design Report for the LUXE Experiment

Autor: Abramowicz, Halina, Acosta, Uwe Hernandez, Altarelli, Massimo, Assmann, Ralph, Bai, Zhaoyu, Behnke, Ties, Benhammou, Yan, Blackburn, Thomas, Boogert, Stewart, Borysov, Oleksandr, Borysova, Maryna, Brinkmann, Reinhard, Bruschi, Marco, Burkart, Florian, Büßer, Karsten, Cavanagh, Niall, Davidi, Oz, Decking, Winfried, Dosselli, Umberto, Elkina, Nina, Fedotov, Alexander, Firlej, Miroslaw, Fiutowski, Tomasz, Fleck, Kyle, Gostkin, Mikhail, Grojean, Christophe, Hallford, John Andrew, Harsh, Harsh, Hartin, Anthony, Heinemann, Beate, Heinzl, Tom, Helary, Louis, Hoffmann, Marius, Huang, Shan, Huang, Xinhe, Idzik, Marek, Ilderton, Anton, Jacobs, Ruth Magdalena, Kaempfer, Burkhard, King, Ben, Lakhno, Hlib, Levanon, Assaf, Levy, Aharon, Levy, Itamar, List, Jenny, Lohmann, Wolfgang, Ma, Teng, Macleod, Alexander John, Malka, Victor, Meloni, Federico, Mironov, Arseny, Morandin, Mauro, Moron, Jakub, Negodin, Evgueni, Perez, Gilad, Pomerantz, Ishay, Poeschl, Roman, Prasad, Rajendra, Quere, Fabien, Ringwald, Andreas, Roedel, Christian, Rykovanov, Sergey, Salgado, Felipe, Santra, Arka, Sarri, Gianluca, Saevert, Alexander, Sbrizzi, Antonio, Schmitt, Stefan, Schramm, Ulrich, Schuwalow, Sergej, Seipt, Daniel, Shaimerdenova, Leila, Shchedrolosiev, Mykyta, Skakunov, Maksim, Soreq, Yotam, Streeter, Matthew, Swientek, Krzysztof, Hod, Noam Tal, Tang, Suo, Teter, Thomas, Thoden, Daniel, Titov, Alexander, Tolbanov, Oleg, Torgrimsson, Greger, Tyazhev, Anton, Wing, Matthew, Zanetti, Marco, Zarubin, Andrei, Zeil, Karl, Zepf, Matt, Zhemchukov, Aleksey

This Conceptual Design Report describes LUXE (Laser Und XFEL Experiment), an experimental campaign that aims to combine the high-quality and high-energy electron beam of the European XFEL with a powerful laser to explore the uncharted terrain of quan

Externí odkaz: http://arxiv.org/abs/2102.02032