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🗓️ 24.11.2025 online via BigBlueButton
Web-Seminar der Reihe "Fit für Solawi".
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An algebra modality admitting countably many deriving transformations
Jean-Baptiste Vienney
https://arxiv.org/abs/2510.03953 https://arxiv.org/pdf/2510.039…

An algebra modality admitting countably many deriving transformations
A differential category is an additive symmetric monoidal category, that is, a symmetric monoidal category enriched over commutative monoids, with an algebra modality, axiomatizing smooth functions, and a deriving transformation on this algebra modality, axiomatizing differentiation. Lemay proved that a comonoidal algebra modality has at most one deriving transformation, thus differentiation is unique in models of differential linear logic. It was then an open problem whether this result extend…

Lattice Translation Modulated Symmetries and TFTs
Ching-Yu Yao
https://arxiv.org/abs/2510.03889 https://arxiv.org/pdf/2510.03889

Lattice Translation Modulated Symmetries and TFTs
Modulated symmetries are internal symmetries that are not invariant under spacetime symmetry actions. We propose a general way to describe the lattice translation modulated symmetries in 1+1D, including the non-invertible ones, via the tensor network language. We demonstrate that the modulations can be described by some autoequivalences of the categories. Although the topological behaviors are broken because of the presence of modulations, we can still construct the modulated version of the sym…

Better Together: Leveraging Unpaired Multimodal Data for Stronger Unimodal Models
Sharut Gupta, Shobhita Sundaram, Chenyu Wang, Stefanie Jegelka, Phillip Isola
https://arxiv.org/abs/2510.08492

Better Together: Leveraging Unpaired Multimodal Data for Stronger Unimodal Models
Traditional multimodal learners find unified representations for tasks like visual question answering, but rely heavily on paired datasets. However, an overlooked yet potentially powerful question is: can one leverage auxiliary unpaired multimodal data to directly enhance representation learning in a target modality? We introduce UML: Unpaired Multimodal Learner, a modality-agnostic training paradigm in which a single model alternately processes inputs from different modalities while sharing pa…

Information Loss and Cost in Symmetry Breaking
Javier Molina-Vilaplana, Germ\'an Sierra, H. C. Zhang
https://arxiv.org/abs/2509.24625 https://arxiv.org…

Information Loss and Cost in Symmetry Breaking
We develop an algebraic and information-theoretic framework to characterize symmetry breaking of generalized, non-invertible symmetries in two spatial dimensions. The reduction of symmetry is modeled within subfactor theory, where condensable Frobenius algebras play the role of subgroups in the categorical setting. This perspective naturally connects to the description of anyon condensation in topological phases of matter. Central to our approach are coarse-graining maps, or conditional expecta…

Symmetry in magnetoelectric electromagnetism and magnetoelectric meta-atoms
E. O. Kamenetskii
https://arxiv.org/abs/2510.02521 https://arxiv.org/pdf/2510.0…

Symmetry in magnetoelectric electromagnetism and magnetoelectric meta-atoms
While in electromagnetism we have space-time symmetry, magnetoelectric (ME) processes are characterized by space-time symmetry breaking. Our goal is to show that quantum vacuum fields with both time reversal and space inversion symmetry breaking (so-called ME fields) can be observed in subwavelength regions of electromagnetic (EM) radiation. The sources of ME fields are ME meta-atoms, subwavelength elements made of magnetic insulators, where the dynamical ME behavior is due to modulations and t…

High Throughput Optical Switching in Telecommunication Band via Hybrid Phase Change Metasurfaces
Amin Zamani, Gabriel Sanderson, Lu Zhang, Qiwei Miao, Sara Moujdi, Ze Zheng, Mohammadhossein Momtazpour, Christopher J. Mellor, Wending Zhang, Ting Mei, Zakaria Mansouri, Lei Xu, Mohsen Rahmani
https://arxiv.org/abs/2510.11881

High Throughput Optical Switching in Telecommunication Band via Hybrid Phase Change Metasurfaces
The growing demand for more efficient data transmission has made nanoscale high-throughput all-optical switching a critical requirement in modern telecommunication systems. Metasurface-based platforms offer unique advantages because of their compact design, energy efficiency, and the ability to precisely manipulate light at the subwavelength scale, in a contact-less fashion. However, achieving both high transmission modulation and low optical loss in the telecom band remains a challenge. This s…

Ukrainischer Sender: Zwei ukrainische Journalisten bei Drohnenangriff getötet
Aus der Ukraine wird gemeldet, dass im Osten des Landes zwei ukrainische Journalisten bei einem russischen Drohnenangriff getötet worden sind. Wie der ukrainische Sender Freedom TV mitteilte, befanden sich ihre Reporter in der ostukrainischen Stadt Kramatorsk an einer Tankstelle, als ihr Auto von einer russischen Drohne des Typs Lancet getroffen wur…
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Ukraine-Liveblog: ++ Kiew: Übergabe von 1.000 Leichen durch Russland ++
Ukrainische Behörden haben die Übergabe von 1.000 Soldatenleichen durch Russland gemeldet. Nach ukrainischen Angaben sind durch russische Angriffe mindestens zwölf Menschen getötet worden.

Faraday patterns, spin textures, spin-spin correlations and competing instabilities in a driven spin-1 antiferromagnetic Bose-Einstein condensate
Vaishakh Kargudri, Sandra M. Jose, Rejish Nath
https://arxiv.org/abs/2510.08087

Faraday patterns, spin textures, spin-spin correlations and competing instabilities in a driven spin-1 antiferromagnetic Bose-Einstein condensate
We study the formation of transient Faraday patterns and spin textures in driven quasi-one-dimensional and quasi-two-dimensional spin-1 Bose-Einstein condensates under the periodic modulation of $s$-wave scattering lengths $a_0$ and $a_2$, starting from the anti-ferromagnetic phase. This phase is characterized by a Bogoliubov spectrum consisting of three modes: one mode is gapped, while the other two are gapless. When $a_0$ is modulated and half of the modulation frequency lies below the gapped…

Terahertz field-induced giant symmetry modulations in a van der Waals antiferromagnet
Sheikh Rubaiat Ul Haque, Martin J. Cross, Sangeeta Rajpurohit, Jonah B. Haber, Christopher J. Ciccarino, Alexandra C. Zimmerman, Isabelle J. Sealey, Vadym Kulichenko, Monique Tie, Huaiyu Wang, Sharon S. Philip, Choongwon Seo, Jake D. Koralek, Luis Balicas, Mykhaylo Ozerov, Dmitry Smirnov, Liang Z. Tan, Felipe H. da Jornada, Tadashi Ogitsu, Matthias C. Hoffmann, Tony F. Heinz, Aaron M. Lindenberg
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Terahertz field-induced giant symmetry modulations in a van der Waals antiferromagnet
Strong-field terahertz (THz) excitations enable dynamic control over electronic, lattice and symmetry degrees of freedom in quantum materials. Here, we uncover pronounced terahertz-induced symmetry modulations and coherent phonon dynamics in the van der Waals antiferromagnet MnPS3, in which inversion symmetry is broken by its antiferromagnetic spin configuration. Time-resolved second harmonic generation measurements reveal long-lived giant oscillations in the antiferromagnetic phase, with ampli…