NUT charge in linearized infinite derivative gravity

We study the gravitational field of the NUT-like source in the linearized (ghost-free) infinite derivative gravity. Such a source is equivalent to the spinning semi-infinite cosmic string with no tension. In general relativity, the linearized (massless) Taub-NUT solution has a curvature singularity as well as a topological defect corresponding to distributional curvature on one half of the symmetry axis called the Misner string. We find the NUT-charged spacetime in the linearized infinite derivative gravity. We show that it is free from curvature singularities as well as Misner strings. We also discuss an asymptotic limit along the symmetry axis that leads to the spacetime of a spinning cosmic string of infinite length.Comment: 10 pages, 4 figure

Impulsive waves in ghost-free infinite derivative gravity in anti-de Sitter spacetime

We study exact impulsive gravitational waves propagating in anti-de Sitter spacetime in the context of the ghost free infinite derivative gravity. We show that the source-free theory does not admit any AdS wave solutions other than that of Einstein's general relativity. The situation is significantly different in the presence of sources. We construct impulsive-wave solutions of the infinite derivative gravity generated by massless particles and linear sources in four and three dimensions. The singularities corresponding to distributional curvature at the locations of the sources get smeared by the non-localities. The obtained solutions are regular everywhere. They reduce to the corresponding solutions of general relativity in the infrared regime and in the local limit.Comment: 9 pages, 5 figures, minor corrections and references added, Published in Phys.Rev.

Geodetska konsolidacija obradivih površina socijalističkih gazdinstava

Geodetska konsolidacija obradivih površina socijalističkih gazdinstava

Geodetska konsolidacija obradivih površina socijalističkih gazdinstava

Geodetska konsolidacija obradivih površina socijalističkih gazdinstava