【学术报告】Presymplectic gauge PDEs and Batalin-Vilkovisky formalism

• 主讲人：Maxim Grigoriev
• 举办方： Beijing-Moscow Mathematics Colloquium by Sino-Russian Mathematics Center
• 时间： 2022-03-18 16:00 - 2022-03-18 17:00
• 地点： online

Recording: https://disk.pku.edu.cn:443/link/16EF94A12F9984919BAED5B0FEF3F4C7
Valid Until：2026-04-30 23:59

 

Abstract: Gauge PDE is a geometrical object underlying what physicists call a local gauge field theory defined in terms of BV-BRST formalism. Although gauge PDE can be defined as a PDE equipped with extra structures, the generalization is not entirely straightforward as, for instance, two gauge PDEs can be equivalent even if the underlying PDEs are not. As far as Lagrangian gauge systems are concerned the powerful framework is provided by the Batalin-Vilkovisky (BV) formalism on jet-bundles. However, just like in the case of usual PDEs it is difficult to encode the BV extension of the Lagrangian in terms of the intrinsic geometry of the equation manifold while working on jet-bundles is often very restrictive, especially in analyzing boundary behavior, e.g., in the context of AdS/CFT correspondence. We show that BV Lagrangian (or its weaker analogs) can be encoded in the compatible graded presymplectic structure on the gauge PDE. In the case of genuine Lagrangian systems this presymplectic structure is related to a certain completion of the canonical BV symplectic structure. A presymplectic gauge PDE gives rise to the BV formulation through an appropriate generalization of the Alexandrov-Kontsevich-Schwarz-Zaboronsky (AKSZ) sigma-model construction followed by taking the symplectic quotient. The construction is illustrated on the standard examples of gauge theories with particular emphasis on the Einstein gravity, where this naturally leads to an elegant presymplectic AKSZ representation of the BV formulation for the Cartan-Weyl Lagrangian.

 

Bio: Maxim Grigoriev is the deputy director of Institute for Theoretical and Mathematical Physics, Lomonosov Moscow State University. Maxim Grigoriev's scientific interests include mathematical methods for describing gauge systems (dynamical constraints and symmetry, Batalin-Vilkovisky quantization), higher spin gauge theories, holography, sigma models in superstring theory, and noncommutative theories. He proposed the so-called parent formulation of gauge theories, which systematically combines the Batalin-Vilkovisky and Hamiltonian BRST approaches into a single formalism having the structure of the Aleksandrov-Kontsevich-Schwartz-Zaboronsky (AKSZ) (generalized) sigma model.