منابع مشابه
Twistors, Cft and Holography
According to one of many equivalent definitions of twistors a (null) twistor is a null geodesic in Minkowski spacetime. Null geodesics can intersect at points (events). The idea of Penrose was to think of a spacetime point as a derived concept: points are obtained by considering the incidence of twistors. One needs two twistors to obtain a point. Twistor is thus a “square root” of a point. In t...
متن کاملTwistors and Black Holes
Motivated by black hole physics in N = 2, D = 4 supergravity, we study the geometry of quaternionic-Kähler manifolds M obtained by the c-map construction from projective special Kähler manifolds Ms. Improving on earlier treatments, we compute the Kähler potentials on the twistor space Z and Swann space S in the complex coordinates adapted to the Heisenberg symmetries. The results bear a simple ...
متن کاملD-instantons and twistors
Finding the exact, quantum corrected metric on the hypermultiplet moduli space in Type II string compactifications on Calabi-Yau threefolds is an outstanding open problem. We address this issue by relating the quaternionic-Kähler metric on the hypermultiplet moduli space to the complex contact geometry on its twistor space. In this framework, Euclidean D-brane instantons are captured by contact...
متن کاملTwistors and Supersymmetry
An overview is given of the application of twistor geometric ideas to supersymmetry with particular emphasis on the construction of superspaces associated with fourdimensional spacetime. Talk given at the Leuven Conference on High Energy Physics, July 1995. Permanent address: Dept. of Mathematics, King’s College, London
متن کاملTwistors and 2T-physics1
Two-Time physics applies broadly to the formulation of physics and correctly describes the physical world as we know it. Recently it was applied to a 2T reformulation of the d = 4 twistor superstring, which was suggested by Witten as an efficient approach for computations of physical processes in the maximally supersymmetric N = 4 Yang-Mills field theory in four dimensions. The 2T formalism pro...
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ژورنال
عنوان ژورنال: Classical and Quantum Gravity
سال: 2004
ISSN: 0264-9381,1361-6382
DOI: 10.1088/0264-9381/21/9/009