A fast semidiscrete optimal transport algorithm for a unique reconstruction of the early Universe

Monthly Notices of the Royal Astronomical Society, 2021, Volume 506, Issue 1, pp.1165-1185

Authors:

Levy, Bruno; Mohayaee, Roya; von Hausegger, Sebastian

Abstract:

We leverage powerful mathematical tools stemming from optimal transport theory and transform them into an efficient algorithm to reconstruct the fluctuations of the primordial density field, built on solving the Monge-Ampère-Kantorovich equation. Our algorithm computes the optimal transport between an initial uniform continuous density field, partitioned into Laguerre cells, and a final input set of discrete point masses, linking the early to the late Universe. While existing early universe reconstruction algorithms based on fully discrete combinatorial methods are limited to a few hundred thousand points, our algorithm scales up well beyond this limit, since it takes the form of a well-posed smooth convex optimization problem, solved using a Newton method. We run our algorithm on cosmological N-body simulations, from the AbacusCosmos suite, and reconstruct the initial positions of $\mathcal {O}(10^7)$ particles within a few hours with an off-the-shelf personal computer. We show that our method allows a unique, fast, and precise recovery of subtle features of the initial power spectrum, such as the baryonic acoustic oscillations.

Convergent Bayesian Global Fits of 4D Composite Higgs Models

Journal of High Energy Physics 05 (2021) 237

Authors:

Ethan Carragher, Will Handley, Daniel Murnane, Peter Stangl, Wei Su, Martin White, Anthony G. Williams

Abstract:

Photophilic hadronic axion from heavy magnetic monopoles

JHEP 06 (2021) 123

Authors:

Anton V. Sokolov, Andreas Ringwald

Abstract:

Sensitivity of the Cherenkov Telescope Array for probing cosmology and fundamental physics with gamma-ray propagation

Journal of Cosmology and Astroparticle Physics (2021)

Authors:

Samuel Timothy Spencer, H Abdalla, H Abe, F Acero, A Acharyya, R Adam, I Agudo, A Aguirre-Santaella, R Alfaro, J Alfaro, C Alispach, R Aloisio, R Alves Batista, L Amati, E Amato, G Ambrosi, EO Angüner, A Araudo, T Armstrong, F Arqueros, L Arrabito, K Asano, Y Ascasíbar, M Ashley, M Backes, C Balazs, M Balbo, B Balmaverde, A Baquero Larriva, V Barbosa Martins, M Barkov, L Baroncelli, U Barres de Almeida, JA Barrio, P-I Batista, J Becerra González, Y Becherini, G Beck, J Becker Tjus, R Belmont, W Benbow, E Bernardini, A Berti, M Berton, B Bertucci, V Beshley, B Bi, B Biasuzzi, A Biland, E Bissaldi, J Biteau, O Blanch, F Bocchino, C Boisson, J Bolmont, G Bonanno, L Bonneau Arbeletche, G Bonnoli, P Bordas, E Bottacini, M Böttcher, V Bozhilov, J Bregeon, A Brill, AM Brown, P Bruno, A Bruno, A Bulgarelli, M Burton, M Buscemi, A Caccianiga, R Cameron, M Capasso, M Caprai, A Caproni, R Capuzzo-Dolcetta, P Caraveo, R Carosi, A Carosi, S Casanova, E Cascone, D Cauz, K Cerny, M Cerruti, P Chadwick, S Chaty, A Chen, M Chernyakova, G Chiaro, A Chiavassa, L Chytka, V Conforti, F Conte, JL Contreras, J Coronado-Blazquez, J Cortina, A Costa, H Costantini, S Covino, P Cristofari, O Cuevas, F D’Ammando, MK Daniel, J Davies, F Dazzi, A De Angelis, M de Bony de Lavergne, V De Caprio, R de Cássia dos Anjos, EM de Gouveia Dal Pino, B De Lotto, D De Martino, M de Naurois, E de O na Wilhelmi, F De Palma, V de Souza, C Delgado, R Della Ceca, D della Volpe, D Depaoli, T Di Girolamo, F Di Pierro, C Díaz, C Díaz-Bahamondes, S Diebold, A Djannati-Ataï, A Dmytriiev, A Domínguez, A Donini, D Dorner, M Doro, J Dournaux, VV Dwarkadas, J Ebr, C Eckner, S Einecke, TRN Ekoume, D Elsässer, G Emery, C Evoli, M Fairbairn, D Falceta-Goncalves, S Fegan, Q Feng, G Ferrand, E Fiandrini, A Fiasson, V Fioretti, L Foffano, MV Fonseca, L Font, G Fontaine, FJ Franco, L Freixas Coromina, S Fukami, Y Fukazawa, Y Fukui, D Gaggero, G Galanti, V Gammaldi, E Garcia, M Garczarczyk, D Gascon, M Gaug, A Gent, A Ghalumyan, G Ghirlanda, F Gianotti, M Giarrusso, G Giavitto, N Giglietto, F Giordano, J Glicenstein, P Goldoni, JM González, K Gourgouliatos, T Grabarczyk, P Grandi, J Granot, D Grasso, J Green, J Grube, O Gueta, S Gunji, A Halim, M Harvey, T Hassan Collado, K Hayashi, M Heller, S Hernández Cadena, O Hervet, J Hinton, N Hiroshima, B Hnatyk, R Hnatyk, D Hoffmann, W Hofmann, J Holder, D Horan, J Hörandel, P Horvath, T Hovatta, M Hrabovsky, D Hrupec, G Hughes, M Hütten, M Iarlori, T Inada, S Inoue, A Insolia, M Ionica, M Iori, M Jacquemont, M Jamrozy, P Janecek, I Jiménez Martínez, W Jin, I Jung-Richardt, J Jurysek, P Kaaret, V Karas, S Karkar, N Kawanaka, D Kerszberg, B Khélifi, R Kissmann, J Knödlseder, Y Kobayashi, K Kohri, N Komin, A Kong, K Kosack, H Kubo, N La Palombara, G Lamanna, RG Lang, J Lapington, P Laporte, J Lefaucheur, M Lemoine-Goumard, J Lenain, F Leone, G Leto, F Leuschner, E Lindfors, S Lloyd, T Lohse, S Lombardi, F Longo, A Lopez, M López, R López-Coto, S Loporchio, F Lucarelli, PL Luque-Escamilla, E Lyard, C Maggio, A Majczyna, M Makariev, M Mallamaci, D Mandat, G Maneva, M Manganaro, G Manicò, A Marcowith, M Marculewicz, S Markoff, P Marquez, J Martí, O Martinez, M Martínez, G Martínez, H Martínez-Huerta, G Maurin, D Mazin, JD Mbarubucyeye, D Medina Miranda, M Meyer, S Micanovic, T Miener, M Minev, JM Miranda, A Mitchell, T Mizuno, B Mode, R Moderski, L Mohrmann, E Molina, T Montaruli, A Moralejo, J Morales Merino, D Morcuende-Parrilla, A Morselli, R Mukherjee, C Mundell, T Murach, H Muraishi, A Nagai, T Nakamori, R Nemmen, J Niemiec, D Nieto, M Nievas, M Nikolajuk, K Nishijima, K Noda, D Nosek, S Nozaki, P O’Brien, Y Ohira, M Ohishi, T Oka, RA Ong, M Orienti, R Orito, M Orlandini, E Orlando, JP Osborne, M Ostrowski, I Oya, A Pagliaro, M Palatka, D Paneque, FR Pantaleo, JM Paredes, N Parmiggiani, B Patricelli, L Pavletić, A Pe’er, M Pech, M Pecimotika, M Peresano, M Persic, O Petruk, K Pfrang, P Piatteli, E Pietropaolo, R Pillera, B Pilszyk, D Pimentel, F Pintore, S Pita, M Pohl, V Poireau, M Polo, RR Prado, J Prast, G Principe, N Produit, H Prokoph, M Prouza, H Przybilski, E Pueschel, G Pühlhofer, ML Pumo, M Punch, F Queiroz, A Quirrenbach, R Rando, S Razzaque, E Rebert, S Recchia, P Reichherzer, O Reimer, A Reimer, Y Renier, T Reposeur, W Rhode, D Ribeiro, M Ribó, T Richtler, J Rico, F Rieger, V Rizi, J Rodriguez, G Rodriguez Fernandez, JC Rodriguez Ramirez, JJ Rodríguez Vázquez, P Romano, G Romeo, M Roncadelli, J Rosado, A Rosales de Leon, G Rowell, B Rudak, W Rujopakarn, F Russo, I Sadeh, L Saha, T Saito, F Salesa Greus, D Sanchez, M Sánchez-Conde, P Sangiorgi, H Sano, M Santander, EM Santos, A Sanuy, S Sarkar, FG Saturni, U Sawangwit, A Scherer, B Schleicher, P Schovanek, F Schussler, U Schwanke, E Sciacca, S Scuderi, M Seglar Arroyo, O Sergijenko, M Servillat, K Seweryn, A Shalchi, P Sharma, RC Shellard, H Siejkowski, A Sinha, V Sliusar, A Slowikowska, A Sokolenko, H Sol, A Specovius, S Spencer, D Spiga, A Stamerra, S Stanič, R Starling, T Stolarczyk, U Straumann, J Strišković, Y Suda, P ´Swierk, G Tagliaferri, H Takahashi, M Takahashi, F Tavecchio, L Taylor, LA Tejedor, P Temnikov, R Terrier, T Terzic, V Testa, W Tian, L Tibaldo, D Tonev, DF Torres, E Torresi, L Tosti, N Tothill, G Tovmassian, P Travnicek, S Truzzi, F Tuossenel, G Umana, M Vacula, V Vagelli, M Valentino, B Vallage, P Vallania, C van Eldik, GS Varner, V Vassiliev, M Vázquez Acosta, M Vecchi, J Veh, S Vercellone, S Vergani, V Verguilov, GP Vettolani, A Viana, CF Vigorito, V Vitale, S Vorobiov, I Vovk, T Vuillaume, SJ Wagner, R Walter, J Watson, M White, R White, R Wiemann, A Wierzcholska, M Will, DA Williams, R Wischnewski, A Wolter, R Yamazaki, S Yanagita, L Yang, T Yoshikoshi, M Zacharias, G Zaharijas, D Zaric, M Zavrtanik, D Zavrtanik, AA Zdziarski, A Zech, H Zechlin, VI Zhdanov, M \vZivec

Explaining cosmic ray antimatter with secondaries from old supernova remnants

(2020)

Authors:

Philipp Mertsch, Andrea Vittino, Subir Sarkar