Abstract
The mathfrak{o}mathfrak{s}mathfrak{p}left(2, mathbb{N}right) -BF formulation of dilaton supergravity in two dimensions is considered. We introduce a consistent class of asymptotic conditions preserved by the extended superreparametrization group of the thermal circle at infinity. In the N = 1 and N = 2 cases the phase space foliation in terms of orbits of the super-Virasoro group allows to formulate suitable integrability conditions for the boundary terms that render the variational principle well-defined. Once regularity conditions are imposed, requiring trivial holonomy around the contractible cycle the asymptotic symmetries are broken to some subsets of exact isometries. Different coadjoint orbits of the asymptotic symmetry group yield different types of boundary dynamics; we find that the action principle can be reduced to either the extended super-Schwarzian theory, consistent with the dynamics of a non-vanishing Casimir function, or to superparticle models, compatible with bulk configurations whose Casimir is zero. These results are generalized to mathcal{N}ge 3 by making use of boundary conditions consistent with the loop group of OSp(2, ℕ). Appropriate integrability conditions permit to reduce the dynamics of dilaton supergravity to a particle moving on the OSp(2, ℕ) group manifold. Generalizations of the boundary dynamics for mathcal{N}>2 are obtained once bulk geometries are supplemented with super-AdS2 asymptotics.
Highlights
Gauge symmetry is generically linked to the redundancy in the variables used to describe a field theory
Different coadjoint orbits of the asymptotic symmetry group yield different types of boundary dynamics; we find that the action principle can be reduced to either the extended super-Schwarzian theory, consistent with the dynamics of a non-vanishing Casimir function, or to superparticle models, compatible with bulk configurations whose Casimir is zero
The main purpose of this paper is to explore the asymptotic dynamics of two-dimensional dilaton supergravity and study its connection with models placed at the conformal boundary of the spacetime; namely the superSchwarzian theory and superconformal quantum mechanics [23,24,25]
Summary
Gauge symmetry is generically linked to the redundancy in the variables used to describe a field theory. We show that the asymptotic dynamics described by the extended super-Schwarzian theory is consistent with a nonvanishing Casimir function while the dynamics compatible with zero Casimir entails the existence of a supersymmetric particle model at the boundary In both cases, the phase space is written in terms of orbits of the super-Virasoro group, which is only accessible for N = 1 and N = 2. The latter approach turns out to be useful in order to foliate the phase space of the theory in terms of the adjoint and coadjoint actions of the super-Virasoro group.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have