Fakultät für Mathematik und Physik


 

Recent Submissions

  • Sambale, Benjamin (Berlin, Heidelberg : Springer, 2021)
    Motivated by recent results on the minimal base of a permutation group, we introduce a new local invariant attached to arbitrary finite groups. More precisely, a subset Δ of a finite group G is called a p-base (where p is ...
  • Morinelli, Vincenzo; Morsella, Gerardo; Stottmeister, Alexander; Tanimoto, Yoh (Berlin, Heidelberg : Springer, 2021)
    We present a rigorous renormalization group scheme for lattice quantum field theories in terms of operator algebras. The renormalization group is considered as an inductive system of scaling maps between lattice field ...
  • Noii, Nima; Khodadadian, Amirreza; Ulloa, Jacinto; Aldakheel, Fadi; Wick, Thomas; François, Stijn; Wriggers, Peter (Berlin, Heidelberg : Springer, 2021)
    The prediction of crack initiation and propagation in ductile failure processes are challenging tasks for the design and fabrication of metallic materials and structures on a large scale. Numerical aspects of ductile failure ...
  • Evlyukhin, Andrey B.; Poleva, Maria A.; Prokhorov, Alexei V.; Baryshnikova, Kseniia V.; Miroshnichenko, Andrey E.; Chichkov, Boris N. (Weinheim : Wiley-VCH, 2021)
    A general strategy for the realization of electric and magnetic quasi-trapped modes located at the same spectral position is presented. This strategy's application makes it possible to design metasurfaces allowing switching ...
  • Khalile, Magda; Lotoreichik, Vladimir (Zürich : EMS Publishing House, 2022)
    We consider the problem of geometric optimization of the lowest eigenvalue for the Laplacian on a compact, simply-connected two-dimensional manifold with boundary subject to an attractive Robin boundary condition. We prove ...
  • Ikhlef, Yacine; Morin-Duchesne, Alexi (Amsterdam : SciPost Foundation, 2022)
    In two-dimensional loop models, the scaling properties of critical random curves are encoded in the correlators of connectivity operators. In the dense O(n) loop model, any such operator is naturally associated to a standard ...
  • Frahm, Holger; Gehrmann, Sascha (Berlin, Heidelberg : Springer, 2022)
    The finite size spectrum of the critical ℤ2-staggered spin-1/2 XXZ model with quantum group invariant boundary conditions is studied. For a particular (self-dual) choice of the staggering the spectrum of conformal weights ...
  • Heller, Sebastian (Berlin, Heidelberg : Springer, 2022)
    The twistor space of the moduli space of solutions of Hitchin’s self-duality equations can be identified with the Deligne-Hitchin moduli space of λ-connections. We use real projective structures on Riemann surfaces to prove ...
  • Krivonos, Sergey; Lechtenfeld, Olaf; Sutulin, Anton (Amsterdam : North-Holland Publ., 2022)
    We analyze the integrability of the -extended supersymmetric Calogero–Moser model. We explicitly construct the Lax pair for this system, which properly reproduces all equations of motion. After adding a supersymmetric ...
  • Lechtenfeld, Olaf; Rupprecht, Maximilian (Berlin, Heidelberg : Springer, 2022)
    The Nicolai map is a field transformation that relates supersymmetric theories at finite couplings g with the free theory at g = 0. It is obtained via an ordered exponential of the coupling flow operator integrated from 0 ...
  • Dill, Gabriel A. (Boston, Mass. : Birkhäuser, 2022)
    Let K be a field of characteristic 0 and let G and H be connected commutative algebraic groups over K. Let Mor0(G,H) denote the set of morphisms of algebraic varieties G → H that map the neutral element to the neutral ...
  • Rupprecht, Maximilian (Berlin, Heidelberg : Springer, 2022)
    We offer a novel perspective on N = 4 supersymmetric Yang-Mills (SYM) theory through the framework of the Nicolai map, a transformation of the bosonic fields that allows one to compute quantum correlators in terms of a ...
  • Ivanov, Vsevolod R.; Ketov, Sergei V.; Pozdeeva, Ekaterina O.; Vernov, Sergey Y. (London : IOP, 2022)
    We study several extensions of the Starobinsky model of inflation, which obey all observational constraints on the inflationary parameters, by demanding that both the inflaton scalar potential in the Einstein frame and the ...
  • Lankeit, Johannes; Winkler, Michael (Basel : Springer, 2022)
    We introduce a generalized concept of solutions for reaction–diffusion systems and prove their global existence. The only restriction on the reaction function beyond regularity, quasipositivity and mass control is special ...
  • Mortazavi, Bohayra; Shahrokhi, Masoud; Javvaji, Brahmanandam; Shapeev, Alexander V.; Zhuang, Xiaoying (Bristol : IOP Publ., 2022)
    In the latest experimental success, NbOI2 two-dimensional (2D) crystals with anisotropic electronic and optical properties have been fabricated (Adv. Mater. 33 (2021), 2101505). In this work inspired by the aforementioned ...
  • Lechtenfeld, Olaf; Nicolai, Hermann (Berlin, Heidelberg : Springer, 2022)
    We reconsider the supermembrane in a Minkowski background and in the light-cone gauge as a one-dimensional gauge theory of area preserving diffeomorphisms (APDs). Keeping the membrane tension T as an independent parameter ...
  • Bauer, Wolfram; Laaroussi, Abdellah (New York, NY : Springer, 2022)
    On the seven dimensional Euclidean sphere S7 we compare two subriemannian structures with regards to various geometric and analytical properties. The first structure is called trivializable and the underlying distribution ...
  • Floccari, Salvatore (Berlin, Heidelberg : Springer, 2022)
    We show that the André motive of a hyper-Kähler variety X over a field K⊂ C with b2(X) > 6 is governed by its component in degree 2. More precisely, we prove that if X1 and X2 are deformation equivalent hyper-Kähler varieties ...
  • Sun, Tian-Jiao; Sterin, P.; Lengert, L.; Nawrath, C.; Jetter, M.; Michler, P.; Ji, Yang; Hübner, J.; Oestreich, M. (Melville, NY : American Inst. of Physics, 2022)
    We report on the spin and occupation noise of a single, positively charged (InGa)As quantum dot emitting photons in the telecommunication C-band. The spin noise spectroscopy measurements are carried out at a temperature ...
  • Frahm, Holger; Martins, Márcio J. (Amsterdam : North-Holland Publ. Co., 2022)
    In this paper we investigate the spectrum of OSp(n|2m) quantum spin chains with free boundary conditions. We compute the surface free energy of these models which, similar to other properties in the thermodynamic limit ...

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