Daniel Peralta-Salas, David Perrella, David Pfefferlé
{"title":"Asymmetry of Curl Eigenfields Solving Woltjer’s Variational Problem","authors":"Daniel Peralta-Salas, David Perrella, David Pfefferlé","doi":"10.1007/s00220-026-05575-8","DOIUrl":"10.1007/s00220-026-05575-8","url":null,"abstract":"<div><p>We construct families of rotationally symmetric toroidal domains in <span>({mathbb {R}}^3)</span> for which the eigenfields associated to the first (positive) Ampèrian curl eigenvalue are symmetric, and others for which no first eigenfield is symmetric. This implies, in particular, that minimizers of the celebrated Woltjer’s variational principle do not need to inherit the rotational symmetry of the domain. This disproves the folk wisdom that the eigenfields corresponding to the lowest curl eigenvalue must be symmetric if the domain is.</p></div>","PeriodicalId":522,"journal":{"name":"Communications in Mathematical Physics","volume":"407 4","pages":""},"PeriodicalIF":2.6,"publicationDate":"2026-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00220-026-05575-8.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147375242","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Viscous shock fluctuations in KPZ","authors":"Alexander Dunlap, Evan Sorensen","doi":"10.1007/s00220-026-05561-0","DOIUrl":"10.1007/s00220-026-05561-0","url":null,"abstract":"<div><p>We study “V-shaped” solutions to the KPZ equation, those having opposite asymptotic slopes <span>(theta )</span> and <span>(-theta )</span>, with <span>(theta >0)</span>, at positive and negative infinity, respectively. Answering a question of Janjigian, Rassoul-Agha, and Seppäläinen, we show that the spatial increments of V-shaped solutions cannot be statistically stationary in time. This completes the classification of statistically time-stationary spatial increments for the KPZ equation by ruling out the last case left by those authors. To show that these V-shaped time-stationary measures do not exist, we study the location of the corresponding “viscous shock,” which, roughly speaking, is the location of the bottom of the V. We describe the limiting rescaled fluctuations, and in particular show that the fluctuations of the shock location are not tight, for both stationary and flat initial data. We also show that if the KPZ equation is started with V-shaped initial data, then the long-time limits of the time-averaged laws of the spatial increments of the solution are mixtures of the laws of the spatial increments of <span>(xmapsto B(x)+theta x)</span> and <span>(xmapsto B(x)-theta x)</span>, where <i>B</i> is a standard two-sided Brownian motion.</p></div>","PeriodicalId":522,"journal":{"name":"Communications in Mathematical Physics","volume":"407 4","pages":""},"PeriodicalIF":2.6,"publicationDate":"2026-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147375234","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Generalized Tube Algebras, Symmetry-Resolved Partition Functions, and Twisted Boundary States","authors":"Yichul Choi, Brandon C. Rayhaun, Yunqin Zheng","doi":"10.1007/s00220-025-05543-8","DOIUrl":"10.1007/s00220-025-05543-8","url":null,"abstract":"<div><p>We introduce a class of generalized tube algebras which describe how finite, non-invertible global symmetries of bosonic 1+1d QFTs act on operators which sit at the intersection point of a collection of boundaries and interfaces. We develop a 2+1d symmetry topological field theory (SymTFT) picture of boundaries and interfaces which, among other things, allows us to deduce the representation theory of these algebras. In particular, we initiate the study of a character theory, echoing that of finite groups, and demonstrate how many representation-theoretic quantities can be expressed as partition functions of the SymTFT on various backgrounds, which in turn can be evaluated explicitly in terms of generalized half-linking numbers. We use this technology to explain how the torus and annulus partition functions of a 1+1d QFT can be refined with information about its symmetries. We are led to a vast generalization of Ishibashi states in CFT: to any multiplet of conformal boundary conditions which transform into each other under the action of a symmetry, we associate a collection of generalized Ishibashi states, in terms of which the twisted sector boundary states of the theory and all of its orbifolds can be obtained as linear combinations. We derive a generalized Verlinde formula involving the characters of the boundary tube algebra which ensures that our formulas for the twisted sector boundary states respect open-closed duality. Our approach does not rely on rationality or the existence of an extended chiral algebra; however, in the special case of a diagonal RCFT with chiral algebra <i>V</i> and modular tensor category <span>(mathcal {C})</span>, our formalism produces explicit closed-form expressions—in terms of the <i>F</i>-symbols and <i>R</i>-matrices of <span>(mathcal {C})</span>, and the characters of <i>V</i>—for the twisted Cardy states, and the torus and annulus partition functions decorated by Verlinde lines.</p></div>","PeriodicalId":522,"journal":{"name":"Communications in Mathematical Physics","volume":"407 4","pages":""},"PeriodicalIF":2.6,"publicationDate":"2026-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147375235","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Blow-up Dynamics for Radial Self-Dual Chern–Simons–Schrödinger Equation with Prescribed Asymptotic Profile","authors":"Kihyun Kim, Soonsik Kwon, Sung-Jin Oh","doi":"10.1007/s00220-026-05577-6","DOIUrl":"10.1007/s00220-026-05577-6","url":null,"abstract":"<div><p>We construct finite energy blow-up solutions for the radial self-dual Chern–Simons–Schrödinger equation with a continuum of blow-up rates. Our result stands in stark contrast to the rigidity of blow-up of <span>(H^{3})</span> solutions proved by the first author for equivariant index <span>(m ge 1)</span>, where the soliton-radiation interaction is too weak to admit the present blow-up scenarios. It is optimal (up to an endpoint) in terms of the range of blow-up rates and the regularity of the asymptotic profiles, in view of the authors’ previous proof of <span>(H^{1})</span> soliton resolution for the self-dual Chern–Simons–Schrödinger equation in any equivariance class. Our approach is a backward construction combined with modulation analysis, starting from prescribed asymptotic profiles and deriving the corresponding blow-up rates from their strong interaction with the soliton. In particular, our work may be seen as an adaptation of the method of Jendrej–Lawrie–Rodriguez (developed for energy critical equivariant wave maps) to the Schrödinger case. However, the Schrödinger nature of the equation (in particular, the lack of finite speed of propagation) and the optimal range (up to the <span>(H^{1})</span>-endpoint) of our blow-up construction give rise to new challenges. Notably, the construction of (approximate) radiation from the prescribed asymptotic profile is one of our key novelties and might be of independent interest.</p></div>","PeriodicalId":522,"journal":{"name":"Communications in Mathematical Physics","volume":"407 4","pages":""},"PeriodicalIF":2.6,"publicationDate":"2026-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147375246","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. Alexandrov, B. Bychkov, P. Dunin-Barkowski, M. Kazarian, S. Shadrin
{"title":"Any Topological Recursion on a Rational Spectral Curve is KP Integrable","authors":"A. Alexandrov, B. Bychkov, P. Dunin-Barkowski, M. Kazarian, S. Shadrin","doi":"10.1007/s00220-026-05566-9","DOIUrl":"10.1007/s00220-026-05566-9","url":null,"abstract":"<div><p>We prove that for any initial data on a genus zero spectral curve the corresponding correlation differentials of topological recursion are KP integrable. As an application we prove KP integrability of partition functions associated via ELSV-type formulas to the <i>r</i>-th roots of the twisted powers of the log canonical bundles.\u0000</p></div>","PeriodicalId":522,"journal":{"name":"Communications in Mathematical Physics","volume":"407 4","pages":""},"PeriodicalIF":2.6,"publicationDate":"2026-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00220-026-05566-9.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147375232","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Thomas Creutzig, Robert McRae, Florencia Orosz Hunziker, Jinwei Yang
{"title":"N =1 Super Virasoro Tensor Categories","authors":"Thomas Creutzig, Robert McRae, Florencia Orosz Hunziker, Jinwei Yang","doi":"10.1007/s00220-026-05564-x","DOIUrl":"10.1007/s00220-026-05564-x","url":null,"abstract":"<div><p>We show that the category of <span>(C_1)</span>-cofinite modules for the universal <span>(N=1)</span> super Virasoro vertex operator superalgebra <span>(mathcal {S}(c,0))</span> at any central charge <i>c</i> is locally finite and admits the vertex algebraic braided tensor category structure of Huang–Lepowsky–Zhang. For central charges <span>(c^{mathfrak {ns}}(t)=frac{15}{2}-3(t+t^{-1}))</span> with <span>(tnotin mathbb {Q})</span>, we show that this tensor category is semisimple, rigid, and slightly degenerate, and we determine its fusion rules. For central charge <span>(c^{mathfrak {ns}}(1)=frac{3}{2})</span>, we show that this tensor category is rigid and that its simple modules have the same fusion rules as <span>(textrm{Rep},mathfrak {osp}(1vert 2))</span>, in agreement with earlier fusion rule calculations of Milas. Finally, for the remaining central charges <span>(c^{mathfrak {ns}}(t))</span> with <span>(tin mathbb {Q}^times )</span>, we show that the simple <span>(mathcal {S}(c^{mathfrak {ns}}(t),0))</span>-module <span>(mathcal {S}_{2,2})</span> of lowest conformal weight <span>(h^{mathfrak {ns}}_{2,2}(t)=frac{3(t-1)^2}{8t})</span> is rigid and self-dual, except possibly when <span>(t^{pm 1})</span> is a negative integer or when <span>(c^{mathfrak {ns}}(t))</span> is the central charge of a rational <span>(N=1)</span> superconformal minimal model. As <span>(mathcal {S}_{2,2})</span> is expected to generate the category of <span>(C_1)</span>-cofinite <span>(mathcal {S}(c^{mathfrak {ns}}(t),0))</span>-modules under fusion, rigidity of <span>(mathcal {S}_{2,2})</span> is the first key step to proving rigidity of this category for general <span>(tin mathbb {Q}^times )</span>.</p></div>","PeriodicalId":522,"journal":{"name":"Communications in Mathematical Physics","volume":"407 4","pages":""},"PeriodicalIF":2.6,"publicationDate":"2026-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00220-026-05564-x.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147375241","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Asymptotics for Resolutions and Smoothings of Calabi-Yau Conifolds","authors":"Abdou Oussama Benabida","doi":"10.1007/s00220-026-05578-5","DOIUrl":"10.1007/s00220-026-05578-5","url":null,"abstract":"<div><p>We show that the Calabi–Yau metrics with isolated conical singularities of Hein-Sun (Publ Math de l’IHÉS, 126(1):73–130, 2017) admit polyhomogeneous expansions near their singularities. Moreover, we show that, under certain generic assumptions, natural families of smooth Calabi-Yau metrics on crepant resolutions and on polarized smoothings of conical Calabi–Yau manifolds degenerating to the initial conical Calabi-Yau metric admit polyhomogeneous expansions where the singularities are forming. The construction proceeds by performing weighted Melrose-type blow-ups and then gluing conical and scaled asymptotically conical Calabi-Yau metrics on the fibers, close to the blow-up’s front face without compromising polyhomogeneity. This yields a polyhomogeneous family of Kähler metrics that are approximately Calabi-Yau. Solving formally a complex Monge-Ampère equation, we obtain a polyhomogeneous family of Kähler metrics with Ricci potential converging rapidly to zero as the family is degenerating. We can then conclude that the corresponding family of degenerating Calabi-Yau metrics is polyhomogeneous by using a fixed point argument.</p></div>","PeriodicalId":522,"journal":{"name":"Communications in Mathematical Physics","volume":"407 4","pages":""},"PeriodicalIF":2.6,"publicationDate":"2026-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147375243","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Quantum Cellular Automata and Categorical Dualities of Spin Chains","authors":"Corey Jones, Kylan Schatz, Dominic J. Williamson","doi":"10.1007/s00220-026-05571-y","DOIUrl":"10.1007/s00220-026-05571-y","url":null,"abstract":"<div><p>Dualities play a central role in the study of quantum spin chains, providing insight into the structure of quantum phase diagrams and phase transitions. In this work, we study categorical dualities, which are defined as bounded-spread isomorphisms between algebras of symmetry-respecting local operators on a spin chain. We consider generalized global symmetries that correspond to unitary fusion categories, which are represented by matrix-product operator algebras. A fundamental question about dualities is whether they can be extended to quantum cellular automata on the larger algebra generated by all local operators in the the unit matrix-product operator sector. For on-site representations of Hopf algebra symmetries, this larger algebra is the usual tensor product quasi-local algebra. We present a solution to the extension problem using the machinery of Doplicher–Haag–Roberts bimodules. Our solution provides a crisp categorical criterion for when an extension of a duality exists. We show that the set of possible extensions form a torsor over the invertible objects in the relevant symmetry category. As a corollary, we obtain a classification result concerning dualities in the group case.</p></div>","PeriodicalId":522,"journal":{"name":"Communications in Mathematical Physics","volume":"407 4","pages":""},"PeriodicalIF":2.6,"publicationDate":"2026-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00220-026-05571-y.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147375245","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Mikhail Belolipetsky, Gregory Cosac, Cayo Dória, Gisele Teixeira Paula
{"title":"On Multiplicities in Length Spectra of Semi-Arithmetic Hyperbolic Surfaces","authors":"Mikhail Belolipetsky, Gregory Cosac, Cayo Dória, Gisele Teixeira Paula","doi":"10.1007/s00220-026-05581-w","DOIUrl":"10.1007/s00220-026-05581-w","url":null,"abstract":"<div><p>We show that semi-arithmetic surfaces of arithmetic dimension two which admit a modular embedding have exponential growth of mean multiplicities in their length spectrum. Prior to this work large mean multiplicities were rigorously confirmed only for the length spectra of arithmetic surfaces. We also discuss the relation of the degeneracies in the length spectrum and quantization of the Hamiltonian mechanical system on the surface.</p></div>","PeriodicalId":522,"journal":{"name":"Communications in Mathematical Physics","volume":"407 4","pages":""},"PeriodicalIF":2.6,"publicationDate":"2026-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00220-026-05581-w.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147375276","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Conservative Stochastic PDE and Fluctuations of the Symmetric Simple Exclusion Process","authors":"Nicolas Dirr, Benjamin Fehrman, Benjamin Gess","doi":"10.1007/s00220-026-05587-4","DOIUrl":"10.1007/s00220-026-05587-4","url":null,"abstract":"<div><p>In this paper, we provide a continuum model for the fluctuations of the symmetric simple exclusion process about its hydrodynamic limit. The model is based on an approximating sequence of stochastic PDEs with nonlinear, conservative noise. In the small-noise limit, we show that the fluctuations of the solutions are to first-order the same as the fluctuations of the particle system. Furthermore, the SPDEs correctly simulate the rare events in the particle process. We prove that the solutions satisfy a zero-noise large deviations principle with rate function equal to that describing the deviations of the symmetric simple exclusion process.</p></div>","PeriodicalId":522,"journal":{"name":"Communications in Mathematical Physics","volume":"407 4","pages":""},"PeriodicalIF":2.6,"publicationDate":"2026-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147375237","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}