Anagram & Information om | Engelska ordet SPACETIMES

Exempel på hur man kan använda SPACETIMES i en mening

• Another approach is the conjectured, but yet unproven AdS/CFT duality, which is believed to provide a full, non-perturbative definition of string theory in spacetimes with anti-de Sitter asymptotics.
• CTCs are associated, in Lorentzian manifolds which are interpreted physically as spacetimes, with the possibility of causal anomalies such as a person going back in time and potentially shooting their own grandfather, although paradoxes might be avoided using some constraint such as the Novikov self-consistency principle.
• Thus, Penrose diagrams are also useful in the study of asymptotic properties of spacetimes and singularities.
• In this reformulation, spacetimes are sliced up into spatial hyperslices in a rather arbitrary fashion, and the vacuum Einstein field equation is reformulated as an evolution equation describing how, given the geometry of an initial hyperslice (the "initial value"), the geometry evolves over "time".
• Only in certain situations, such as in asymptotically flat spacetimes (zero cosmological curvature), can the notion of incoming and outgoing particle be recovered, thus enabling one to define an S-matrix.
• He has often criticized the widely held assumption in the string theory community that background spacetimes with different asymptotics can represent different vacua states of the same theory of quantum gravity.
• In particular, there is a very general relationship between thermal radiation and spacetimes that admit a one-parameter group of isometries possessing a bifurcate Killing horizon, which consists of a pair of intersecting null hypersurfaces that are orthogonal to the Killing field.
• In (four-dimensional) Lorentzian spacetimes, there is a six-dimensional space of antisymmetric bivectors at each event.
• Because spherically symmetric spacetimes are by definition irrotational, they are not realistic models of black holes in nature.
• 4 for nonlocal nature of gravitational field energy, and all of chapter 20 for relation between integration, Bianchi identities, and 'conservation laws' in curved spacetimes.
• In the theory of Lorentzian manifolds, spherically symmetric spacetimes admit a family of nested round spheres.
• In the theory of Lorentzian manifolds, spherically symmetric spacetimes admit a family of nested round spheres.
• The generalization of the BKL model to the cosmological singularity in multidimensional (Kaluza–Klein type) cosmological models has a chaotic character in the spacetimes whose dimensionality is not higher than ten, while in the spacetimes of higher dimensionalities a universe after undergoing a finite number of oscillations enters into monotonic Kasner-type contracting regime.
• More generally, Penrose conjectured that an inequality as above should hold for spacelike submanifolds of spacetimes that are not necessarily time-symmetric.
• In recent, Balachandran's research has been focused on the formulation of quantum field theories on noncommutative spacetimes and investigating the emergent significance of Hopf algebras in quantum physics as generalisations of symmetry groups.
• In the same year, it was shown by Hartle and Hawking that these spacetimes can be analytically extended to electrovacuum black hole spacetimes with a regular domain of outer communication.
• This paper led to further advances, including the proof, by Vasy and Peter Hintz, of the global nonlinear stability of the Kerr-de Sitter family of black hole spacetimes, and a new proof of Smale's conjecture for Anosov flows by Semyon Dyatlov and Maciej Zworski.
• Furthermore, via the AdS/CFT correspondence, the M5-brane worldvolume theory can be used to study M-theory on asymptotically Anti-de Sitter (AdS) spacetimes.
• Ktrous he demonstrated that all these solutions of the Einstein equations possessed a special geometrical object, called Killing-Yano tensor, which is responsible for a complete integrability of equations of motion of particles and separability of most interesting physical field equations in these spacetimes.

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