Topological two-form gravity in four dimensions
نویسندگان
چکیده
منابع مشابه
Topological gravity in dimensions two and four
Recent work on gravity in two dimensions has a natural generalization to four dimensions. 1. Basic definitions 1.1 The (symmetric monoidal) two-category (Gravity)d+1 has objects: compact oriented d-manifolds, with • morphisms V0 → V1 : (d+ 1)-manifolds W with ∂W ∼= V op 0 t V1, and • diffeomorphisms W̃ →W as two-morphisms. The category Mor(V0, V1) with cobordisms from V0 to V1 as objects and dif...
متن کاملTopological Conformal Gravity in Four Dimensions
In this paper, we present a new formulation of topological conformal gravity in four dimensions. Such a theory was first considered by Witten as a possible gravitational counterpart of topological Yang–Mills theory, but several problems left it incomplete. The key in our approach is to realise a theory which describes deformations of conformally self-dual gravitational instantons. We first iden...
متن کاملThe Partition Function in the Four-Dimensional Schwarz-Type Topological Half-Flat Two-Form Gravity
Abstract We examine the partition functions and the renormalization of the Schwarz-type four-dimensional topological half-flat 2-form gravity model on K3-surface or T 4 up to on-shell one-loop corrections. In this model the bosonic moduli spaces describe an equivalent class of a trio of the Einstein-Kähler forms ( the hyperkähler forms ).We examine the partition functions and the renormalizatio...
متن کاملGravitational instantons and moduli spaces in topological two-form gravity.
A topological version of four-dimensional (Euclidean) Einstein gravity which we propose regards anti-self-dual 2-forms and an anti-self-dual part of the frame connections as fundamental fields. The theory describes the moduli spaces of conformally self-dual Einstein manifolds for a cosmological constant Λ 6= 0 case and Einstein-Kählerian manifold with the vanishing real first Chern class for Λ ...
متن کاملTopological Matter in Four Dimensions
Topological models involving matter couplings to Donaldson-Witten theory are presented. The construction is carried using both, the topological algebra and its central extension, which arise from the twisting of N = 2 supersymmetry in four dimensions. The framework in which the construction is based is constituted by the superspace associated to these algebras. The models show new features of t...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review D
سال: 1993
ISSN: 0556-2821
DOI: 10.1103/physrevd.47.1563