SISSA Preprints

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  • Brain, Simon; Landi, Giovanni (2009-02-03)
    We give a \theta-deformed version of the ADHM construction of SU(2) instantons with arbitrary topological charge on the sphere S^4. Classically the instanton gauge fields are constructed from suitable monad data; we show ...
  • Ballarin, Francesco; Faggiano, Elena; Ippolito, Sonia; Manzoni, Andrea; Quarteroni, Alfio; Rozza, Gianluigi; Scrofani, Roberto (2015-09)
    In this work a reduced-order computational framework for the study of haemodynamics in three-dimensional patient-specific configurations of coronary artery bypass grafts dealing with a wide range of scenarios is proposed. ...
  • Altafini, Claudio (2006-04-12)
    The feedback stabilization problem for ensembles of coupled spin 1/2 systems is discussed from a control theoretic perspective. The noninvasive nature of the bulk measurement allows for a fully unitary and deterministic ...
  • Bertolini, Stefano; Malinsky, Michal; Schwetz, Thomas (2006-06-13)
    We present a detailed study of the quark and lepton mass spectra in a SO(10) framework with one 10_H and one \bar{126}_H Higgs representations in the Yukawa sector. We consider in full generality the interplay between ...
  • Acharya, Bobby Samir; Benini, Francesco; Valandro, Roberto (2006-09-07)
    Type IIA flux compactifications with O6-planes have been argued from a four dimensional effective theory point of view to admit stable, moduli free solutions. We discuss in detail the ten dimensional description of such ...
  • Benini, Francesco (2007-03-02)
    Type IIA flux compactifications with O6-planes have been argued from a four dimensional effective theory point of view to admit stable, moduli free solutions. We discuss in detail the ten dimensional description of such ...
  • Bonelli, Giulio; Bonora, Loriano; Ricco, Antonio (2006-04-18)
    In this letter we study topological open string field theory on D--branes in a IIB background given by non compact CY geometries ${\cal O}(n)\oplus{\cal O}(-2-n)$ on $\P1$ with a singular point at which an extra fiber sits. ...
  • Bonora, Loriano; Bytsenko, Andrei A. (2006-04-12)
    The purpose of this paper is to provide the reader with a collection of results which can be found in the mathematical literature and to apply them to hyperbolic spaces that may have a role in physical theories. Specifically ...
  • Ponsot, Benedicte (2007-11-14)
    New integral representations for form factors in the two parametric SS model are proposed. Some form factors in the parafermionic sine-Gordon model and in an integrable perturbation of SU(2) coset conformal field theories ...
  • Delfino, Gesualdo; Niccoli, Giuliano (2006-01-17)
    The form factors of the descendant operators in the massive Lee-Yang model are determined up to level 7. This is first done by exploiting the conserved quantities of the integrable theory to generate the solutions for the ...
  • Michelangeli, Alessandro; Ottolini, Andrea; Scandone, Raffaele (SISSA, 2018-01)
    We consider the fractional powers of singular (point-like) perturbations of the Laplacian and the singular perturbations of fractional powers of the Laplacian, and we compare two such constructions focusing on their ...
  • Dal Maso, Gianni; Orlando, Gianluca; Toader, Rodica (SISSA, 2015-04)
    We study the asymptotic behavior of a variational model for damaged elastoplastic materials in the case of antiplane shear. The energy functionals we consider depend on a small parameter " , which forces damage concentration ...
  • Antonić, Nenad; Erceg, Marko; Michelangeli, Alessandro (2017-04)
    The Friedrichs (1958) theory of positive symmetric systems of first order partial differential equations encompasses many standard equations of mathematical physics, irrespective of their type. This theory was recast in ...
  • Abriani, Devis (2010-02-05)
    Flat coordinates for Frobenius manifolds defined on the orbit space of a Coxeter group W are specified through a certain system of generators of W-invariant polynomials. In this note, starting from basic invariants proposed ...
  • Barnich, Glenn; Bonelli, Giulio; Grigoriev, Maxim (2006-01-27)
    In this short note we show, at the level of action principles, how the lightcone action of higher spin gauge fields can easily be obtained from the BRST formulation through the elimination of quartets. We analyze how the ...
  • Bonelli, Giulio; Zabzine, Maxim (2006-03-22)
    In this note we generalize a result by Alekseev and Strobl for the case of $p$-branes. We show that there is a relation between anomalous free current algebras and "isotropic" involutive subbundles of $T\oplus \wedge^p ...
  • Heltai, Luca; Roy, Saswati; Costanzo, Francesco (SISSA, 2012-09-13)
    We present the implementation of a solution scheme for fluid-structure interaction problems via the finite element software library deal.II. The solution scheme is an immersed finite element method in which two independent ...
  • Mola, Andrea; Heltai, Luca; DeSimone, Antonio (SISSA, 2014-03)
    We present a model for ship hydrodynamics simulations currently under development at SISSA. The model employs potential flow theory and fully nonlinear free surface boundary conditions. The spatial discretization of the ...
  • Cavaglià, Marco (SISSA, 1993-04-30)
    I present a new way to solve the Wheeler-de Witt equation using the invariance of the classical lagrangian under reparametrization. This property allows one to introduce an arbitrary function for each degree of freedom ...
  • Bonora, Loriano; Maccaferri, Carlo; Scherer Santos, Ricardo Jose; Tolla, Driba Demissie (2006-01-18)
    In this letter we show that vacuum string field theory contains exact solutions that can be interpreted as macroscopic fundamental strings. They are formed by a condensate of infinitely many completely space-localized ...