Non-Markovian paths and cycles in NFT trades
 Yousaf, H Arnold, N Lambiotte, R LaRock, T Clegg, R Zhong, P Alnaimi, A Steer, B (20 Mar 2023)
Tue, 09 May 2023

12:00 - 13:15
L3

Virtual fundamental classes and Batalin-Vilkovisky quantization from supersymmetric twists

Pavel Safronov
(Edinburgh University)
Abstract

Supersymmetric localization allows one to reduce the computation of the partition function of a supersymmetric theory to a finite-dimensional integral, but the space over which one integrates is often singular. In this talk I will explain how one can use shifted symplectic geometry to get rigorous definitions of partition functions and state spaces in theories with extended supersymmetry. For instance, this gives a field-theoretic origin of DT invariants of CY4 manifolds. This is a report on joint work with Brian Williams.

Tue, 16 May 2023

12:00 - 13:15
L3

Abelian Chern-Simons theory on the lattice

Tin Sulejmanpasic
(University of Durham)
Abstract

I will discuss a formulation of an Abelian Chern-Simons theory on the lattice employing the modified Villain formalism. The theory suffers from a well-known problem of having extra zero modes in the Gaussian operator. I will argue that these zero modes are associated with a kind of subsystem symmetry which projects out almost all naive Wilson loops. The operators which survive are framed Wilson loops. These turn out to be topological charges of the associated one-form symmetry, and it has the correct topological spin and correlation functions.

Constraining High-Energy Neutrino Emission from Supernovae with IceCube
 Abbasi, R Ackermann, M Adams, J Agarwalla, S Aguilar, J Ahlers, M Alameddine, J Amin, N Andeen, K Anton, G Argüelles, C Ashida, Y Athanasiadou, S Axani, S Bai, X V, A Baricevic, M Barwick, S Basu, V Bay, R Beatty, J Becker, K Tjus, J Beise, J Bellenghi, C BenZvi, S Berley, D Bernardini, E Besson, D Binder, G Bindig, D Blaufuss, E Blot, S Bontempo, F Book, J Meneguolo, C Böser, S Botner, O Böttcher, J Bourbeau, E Braun, J Brinson, B Brostean-Kaiser, J Burley, R Busse, R Butterfield, D Campana, M Carloni, K Carnie-Bronca, E Chattopadhyay, S Chau, N Chen, C Chen, Z Chirkin, D Choi, S Clark, B Classen, L Coleman, A Collin, G Connolly, A Conrad, J Coppin, P Correa, P Countryman, S Cowen, D Dave, P Clercq, C DeLaunay, J López, D Dembinski, H Deoskar, K Desai, A Desiati, P Vries, K Wasseige, G DeYoung, T Diaz, A Díaz-Vélez, J Dittmer, M Domi, A Dujmovic, H DuVernois, M Ehrhardt, T Eller, P Engel, R Erpenbeck, H Evans, J Evenson, P Fan, K Fang, K Fazely, A Fedynitch, A Feigl, N Fiedlschuster, S Finley, C Fischer, L Fox, D Franckowiak, A Friedman, E Fritz, A Fürst, P Gaisser, T Gallagher, J Ganster, E Garcia, A Gerhardt, L Ghadimi, A Glaser, C Glauch, T Glüsenkamp, T Goehlke, N Gonzalez, J Goswami, S Grant, D Gray, S Griffin, S Griswold, S Günther, C Gutjahr, P Haack, C Hallgren, A Halliday, R Halve, L Halzen, F Hamdaoui, H Minh, M Hanson, K Hardin, J Harnisch, A Hatch, P Haungs, A Helbing, K Hellrung, J Henningsen, F Heuermann, L Heyer, N Hickford, S Hidvegi, A Hill, C Hill, G Hoffman, K Hoshina, K Hou, W Huber, T Hultqvist, K Hünnefeld, M Hussain, R Hymon, K In, S Ishihara, A Jacquart, M Jansson, M Japaridze, G Jayakumar, K Jeong, M Jin, M Jones, B Kang, D Kang, W Kang, X Kappes, A Kappesser, D Kardum, L Karg, T Karl, M Karle, A Katz, U Kauer, M Kelley, J Zathul, A Kheirandish, A Kiryluk, J Klein, S Kochocki, A Koirala, R Kolanoski, H Kontrimas, T Köpke, L Kopper, C Koskinen, D Koundal, P Kovacevich, M Kowalski, M Kozynets, T Kruiswijk, K Krupczak, E Kumar, A Kun, E Kurahashi, N Lad, N Gualda, C Lamoureux, M Larson, M Lauber, F Lazar, J Lee, J DeHolton, K Leszczyńska, A Lincetto, M Liu, Q Liubarska, M Lohfink, E Love, C Mariscal, C Lu, L Lucarelli, F Ludwig, A Luszczak, W Lyu, Y Madsen, J Mahn, K Makino, Y Mancina, S Sainte, W Mariş, I Marka, S Marka, Z Marsee, M Martinez-Soler, I Maruyama, R Mayhew, F McElroy, T McNally, F Mead, J Meagher, K Mechbal, S Medina, A Meier, M Meighen-Berger, S Merckx, Y Merten, L Micallef, J Montaruli, T Moore, R Morii, Y Morse, R Moulai, M Mukherjee, T Naab, R Nagai, R Nakos, M Naumann, U Necker, J Neumann, M Niederhausen, H Nisa, M Noell, A Nowicki, S Pollmann, A O'Dell, V Oehler, M Oeyen, B Olivas, A Orsoe, R Osborn, J O'Sullivan, E Pandya, H Park, N Parker, G Paudel, E Paul, L Heros, C Peterson, J Philippen, S Pieper, S Pizzuto, A Plum, M Pontén, A Popovych, Y Rodriguez, M Pries, B Procter-Murphy, R Przybylski, G Rack-Helleis, J Rawlins, K Rechav, Z Rehman, A Reichherzer, P Renzi, G Resconi, E Reusch, S Rhode, W Richman, M Riedel, B Roberts, E Robertson, S Rodan, S Roellinghoff, G Rongen, M Rott, C Ruhe, T Ruohan, L Ryckbosch, D Safa, I Saffer, J Salazar-Gallegos, D Sampathkumar, P Herrera, S Sandrock, A Santander, M Sarkar, S Savelberg, J Savina, P Schaufel, M Schieler, H Schindler, S Schlüter, B Schlüter, F Schmidt, T Schneider, J Schröder, F Schumacher, L Schwefer, G Sclafani, S Seckel, D Seunarine, S Sharma, A Shefali, S Shimizu, N Silva, M Skrzypek, B Smithers, B Snihur, R Soedingrekso, J Søgaard, A Soldin, D Sommani, G Spannfellner, C Spiczak, G Spiering, C Stamatikos, M Stanev, T Stezelberger, T Stürwald, T Stuttard, T Sullivan, G Taboada, I Ter-Antonyan, S Thompson, W Thwaites, J Tilav, S Tollefson, K Tönnis, C Toscano, S Tosi, D Trettin, A Tung, C Turcotte, R Twagirayezu, J Ty, B Elorrieta, M Upadhyay, A Upshaw, K Valtonen-Mattila, N Vandenbroucke, J Eijndhoven, N Vannerom, D Santen, J Vara, J Veitch-Michaelis, J Venugopal, M Verpoest, S Veske, D Walck, C Watson, T Weaver, C Weigel, P Weindl, A Weldert, J Wendt, C Werthebach, J Weyrauch, M Whitehorn, N Wiebusch, C Willey, N Williams, D Wolf, M Wrede, G Xu, X Yanez, J Yildizci, E Yoshida, S Yu, F Yu, S Yuan, T Zhang, Z Zhelnin, P (06 Mar 2023) http://arxiv.org/abs/2303.03316v1
Observation of Seasonal Variations of the Flux of High-Energy
Atmospheric Neutrinos with IceCube
 Abbasi, R Ackermann, M Adams, J Agarwalla, S Aguilar, J Ahlers, M Alameddine, J Amin, N Andeen, K Anton, G Argüelles, C Ashida, Y Athanasiadou, S Axani, S Bai, X V, A Baricevic, M Barwick, S Basu, V Bay, R Beatty, J Becker, K Tjus, J Beise, J Bellenghi, C BenZvi, S Berley, D Bernardini, E Besson, D Binder, G Bindig, D Blaufuss, E Blot, S Bontempo, F Book, J Meneguolo, C Böser, S Botner, O Böttcher, J Bourbeau, E Braun, J Brinson, B Brostean-Kaiser, J Burley, R Busse, R Butterfield, D Campana, M Carloni, K Carnie-Bronca, E Chattopadhyay, S Chen, C Chen, Z Chirkin, D Choi, S Clark, B Classen, L Coleman, A Collin, G Connolly, A Conrad, J Coppin, P Correa, P Countryman, S Cowen, D Dave, P Clercq, C DeLaunay, J López, D Dembinski, H Deng, S Deoskar, K Desai, A Desiati, P Vries, K Wasseige, G DeYoung, T Diaz, A Díaz-Vélez, J Dittmer, M Domi, A Dujmovic, H DuVernois, M Ehrhardt, T Eller, P Engel, R Erpenbeck, H Evans, J Evenson, P Fan, K Fang, K Fazely, A Fedynitch, A Feigl, N Fiedlschuster, S Finley, C Fischer, L Fox, D Franckowiak, A Friedman, E Fritz, A Fürst, P Gaisser, T Gallagher, J Ganster, E Garcia, A Garrappa, S Gerhardt, L Ghadimi, A Glaser, C Glauch, T Glüsenkamp, T Goehlke, N Gonzalez, J Goswami, S Grant, D Gray, S Griffin, S Griswold, S Günther, C Gutjahr, P Haack, C Hallgren, A Halliday, R Halve, L Halzen, F Hamdaoui, H Minh, M Hanson, K Hardin, J Harnisch, A Hatch, P Haungs, A Hauser, S Helbing, K Hellrung, J Henningsen, F Heuermann, L Hickford, S Hidvegi, A Hill, C Hill, G Hoffman, K Hoshina, K Hou, W Huber, T Hultqvist, K Hünnefeld, M Hussain, R Hymon, K In, S Iovine, N Ishihara, A Jacquart, M Jansson, M Japaridze, G Jayakumar, K Jeong, M Jin, M Jones, B Kang, D Kang, W Kang, X Kappes, A Kappesser, D Kardum, L Karg, T Karl, M Karle, A Katz, U Kauer, M Kelley, J Zathul, A Kheirandish, A Kin, K Kiryluk, J Klein, S Kochocki, A Koirala, R Kolanoski, H Kontrimas, T Köpke, L Kopper, C Koskinen, D Koundal, P Kovacevich, M Kowalski, M Kozynets, T Kruiswijk, K Krupczak, E Kumar, A Kun, E Kurahashi, N Lad, N Gualda, C Lamoureux, M Larson, M Lauber, F Lazar, J Lee, J DeHolton, K Leszczyńska, A Lincetto, M Liu, Q Liubarska, M Lohfink, E Love, C Mariscal, C Lu, L Lucarelli, F Ludwig, A Luszczak, W Lyu, Y Ma, W Madsen, J Mahn, K Makino, Y Mancina, S Sainte, W Mariş, I Marka, S Marka, Z Marsee, M Martinez-Soler, I Maruyama, R Mayhew, F McElroy, T McNally, F Mead, J Meagher, K Mechbal, S Medina, A Meier, M Meighen-Berger, S Merckx, Y Merten, L Micallef, J Mockler, D Montaruli, T Moore, R Morii, Y Morse, R Moulai, M Mukherjee, T Naab, R Nagai, R Nakos, M Naumann, U Necker, J Neumann, M Niederhausen, H Nisa, M Noell, A Nowicki, S Pollmann, A Oehler, M Oeyen, B Olivas, A Orsoe, R Osborn, J O'Sullivan, E Pandya, H Park, N Parker, G Paudel, E Paul, L Heros, C Peterson, J Philippen, S Pieper, S Pizzuto, A Plum, M Popovych, Y Rodriguez, M Pries, B Procter-Murphy, R Przybylski, G Raab, C Rack-Helleis, J Rawlins, K Rechav, Z Rehman, A Reichherzer, P Renzi, G Resconi, E Reusch, S Rhode, W Richman, M Riedel, B Roberts, E Robertson, S Rodan, S Roellinghoff, G Rongen, M Rott, C Ruhe, T Ruohan, L Ryckbosch, D Safa, I Saffer, J Salazar-Gallegos, D Sampathkumar, P Herrera, S Sandrock, A Santander, M Sarkar, S Savelberg, J Savina, P Schaufel, M Schieler, H Schindler, S Schlüter, B Schmidt, T Schneider, J Schröder, F Schumacher, L Schwefer, G Sclafani, S Seckel, D Seunarine, S Sharma, A Shefali, S Shimizu, N Silva, M Skrzypek, B Smithers, B Snihur, R Soedingrekso, J Søgaard, A Soldin, D Sommani, G Spannfellner, C Spiczak, G Spiering, C Stamatikos, M Stanev, T Stein, R Stezelberger, T Stürwald, T Stuttard, T Sullivan, G Taboada, I Ter-Antonyan, S Thompson, W Thwaites, J Tilav, S Tollefson, K Tönnis, C Toscano, S Tosi, D Trettin, A Tung, C Turcotte, R Twagirayezu, J Ty, B Elorrieta, M Upadhyay, A Upshaw, K Valtonen-Mattila, N Vandenbroucke, J Eijndhoven, N Vannerom, D Santen, J Vara, J Veitch-Michaelis, J Venugopal, M Verpoest, S Veske, D Walck, C Watson, T Weaver, C Weigel, P Weindl, A Weldert, J Wendt, C Werthebach, J Weyrauch, M Whitehorn, N Wiebusch, C Willey, N Williams, D Wolf, M Wrede, G Wulff, J Xu, X Yanez, J Yildizci, E Yoshida, S Yu, F Yu, S Yuan, T Zhang, Z Zhelnin, P (08 Mar 2023) http://arxiv.org/abs/2303.04682v2
Consensus-based Optimization and Ensemble Kalman Inversion for Global Optimization Problems with Constraints
 Carrillo, J Totzeck, C Vaes, U Modeling and Simulation for Collective Dynamics volume 40 195-230 (07 Feb 2023)
Foreword
 Carrillo, J del Teso, F Gómez-Castro, D Discrete and Continuous Dynamical Systems volume 43 issue 34 i-iii (2023)
Tue, 13 Jun 2023

16:00 - 17:00
C3

Cohomological obstructions to lifting properties for full C*-algebras of property (T) groups

Abstract

A C*-algebra has the lifting property (LP) if any unital completely positive map into a quotient C*-algebra admits a completely positive lift. The local lifting property (LLP), introduced by Kirchberg in the early 1990s, is a weaker, local version of the LP.  I will present a method, based on non-vanishing of second cohomology groups, for proving the failure of lifting properties for full C*-algebras of countable groups with (relative) property (T). This allows us to derive that the full C*-algebras of the groups $Z^2\rtimes SL_2(Z)$ and $SL_n(Z)$, for n>2, do not have the LLP. The same method allows us to prove that the full C*-algebras of a large class of groups with property (T), including those admitting a probability measure preserving action with non-vanishing second real-valued cohomology, do not have the LP.  In a different direction, we prove that the full C*-algebras of any non-finitely presented groups with property (T) do not have the LP. Time permitting, I will also discuss a connection with the notion of Hilbert-Schmidt stability for countable groups. This is based on a joint work with Pieter Spaas and Matthew Wiersma.

Subscribe to