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Littérature scientifique sur le sujet « Spacetime Structure »

Auteur : Grafiati

Publié le 2 juin 2025

Mis à jour le 31 juillet 2025

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Articles de revues sur le sujet "Spacetime Structure"

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Konkowski, Deborah A., and Thomas M. Helliwell. "Understanding singularities — Classical and quantum." International Journal of Modern Physics A 31, no. 02n03 (2016): 1641007. http://dx.doi.org/10.1142/s0217751x16410074.

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The definitions of classical and quantum singularities are reviewed. Examples are given of both as well as their utility in general relativity. In particular, the classical and quantum singularity structure of certain interesting conformally static spherically symmetric spacetimes modeling scalar field collapse are reviewed. The spacetimes include the Roberts spacetime, the Husain-Martinez-Nuñez spacetime and the Fonarev spacetime. The importance of understanding spacetime singularity structure is discussed.

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Duggal, K. L. "Space time manifolds and contact structures." International Journal of Mathematics and Mathematical Sciences 13, no. 3 (1990): 545–53. http://dx.doi.org/10.1155/s0161171290000783.

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A new class of contact manifolds (carring a global non-vanishing timelike vector field) is introduced to establish a relation between spacetime manifolds and contact structures. We show that odd dimensional strongly causal (in particular, globally hyperbolic) spacetimes can carry a regular contact structure. As examples, we present a causal spacetime with a non regular contact structure and a physical model [Gödel Universe] of Homogeneous contact manifold. Finally, we construct a model of 4-dimensional spacetime of general relativity as a contact CR-submanifold.

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KRÓL, JERZY. "TOPOS THEORY AND SPACETIME STRUCTURE." International Journal of Geometric Methods in Modern Physics 04, no. 02 (2007): 297–303. http://dx.doi.org/10.1142/s0219887807002028.

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According to the recently proposed model of spacetime, various difficulties of quantum field theories and semiclassical quantum gravity on curved 4-Minkowski spacetimes gain new formulations, leading to new solutions. The quantum mechanical effects appear naturally when diffeomorphisms are lifted to 2-morphisms between topoi. The functional measures can be well defined. Diffeomorphisms invariance and background independence are approached from the perspective of topoi. In the spacetimes modified at short distances by the internal structure of some topoi, the higher dimensional regions appear a

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Suh, Young, Pradip Majhi, and De Chand. "On mixed quasi-Einstein spacetimes." Filomat 32, no. 8 (2018): 2707–19. http://dx.doi.org/10.2298/fil1808707s.

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The object of the present paper is to study mixed quasi-Einstein spacetimes, briefly M(QE)4 spacetimes. First we prove that every Z Ricci pseudosymmetric M(QE)4 spacetimes is a Z Ricci semisymmetric spacetime. Then we study Z flat spacetimes. Also we consider Ricci symmetric M(QE)4 spacetimes and among others we prove that the local cosmological structure of a Ricci symmetricM(QE)4 perfect fluid spacetime can be identified as Petrov type I, DorO. We show that such a spacetime is the Robertson-Walker spacetime. Moreover we deal with mixed quasi-Einstein spacetimes with the associated generators

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Khan, Amir Sultan, Israr Ali Khan, Saeed Islam, and Farhad Ali. "Noether symmetry analysis for novel gravitational wave-like spacetimes and their conservation laws." Modern Physics Letters A 35, no. 28 (2020): 2050234. http://dx.doi.org/10.1142/s021773232050234x.

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The phenomena-like Hawking radiation, the collapse of black holes, and neutron stars decrease the curvature of spacetime continuously with the passage of time. The time conformal factor adds some curvature to nonstatic spacetime. In this article, some novel classes of nonstatic plane-symmetric spacetimes are explored by introducing a time conformal factor in the exact plane-symmetric spacetimes in such a way that their symmetric structure remains conserved. This technique re-scales the energy contents of the corresponding spacetimes, which comes with a re-scaled part in each spacetime. The inv

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Barrett, Thomas William. "Spacetime structure." Studies in History and Philosophy of Science Part B: Studies in History and Philosophy of Modern Physics 51 (August 2015): 37–43. http://dx.doi.org/10.1016/j.shpsb.2015.06.004.

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De, Avik, and Pradip Majhi. "Weakly Ricci symmetric spacetimes." International Journal of Geometric Methods in Modern Physics 15, no. 01 (2017): 1850007. http://dx.doi.org/10.1142/s021988781850007x.

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The objective of the present paper is to study weakly Ricci symmetric spacetimes. Among others, we prove that a weakly Ricci symmetric spacetime obeying Einstein’s field equation without cosmological constant represents stiff matter. Moreover, it is shown that the local cosmological structure of a weakly Ricci symmetric perfect fluid spacetime can be identified as Petrov type [Formula: see text], [Formula: see text] or [Formula: see text]. Next, we prove that a dust and dark fluid weakly Ricci symmetric spacetime satisfying Einstein’s field equation without cosmological constant is vacuum. Fin

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Mallick, Sahanous, and Uday Chand De. "Spacetimes admitting W2-curvature tensor." International Journal of Geometric Methods in Modern Physics 11, no. 04 (2014): 1450030. http://dx.doi.org/10.1142/s0219887814500303.

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The object of this paper is to study spacetimes admitting W2-curvature tensor. At first we prove that a W2-flat spacetime is conformally flat and hence it is of Petrov type O. Next, we prove that if the perfect fluid spacetime with vanishing W2-curvature tensor obeys Einstein's field equation without cosmological constant, then the spacetime has vanishing acceleration vector and expansion scalar and the perfect fluid always behaves as a cosmological constant. It is also shown that in a perfect fluid spacetime of constant scalar curvature with divergence-free W2-curvature tensor, the energy-mom

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Boucetta, Mohamed, Aissa Meliani, and Abdelghani Zeghib. "Kundt three-dimensional left invariant spacetimes." Journal of Mathematical Physics 63, no. 11 (2022): 112501. http://dx.doi.org/10.1063/5.0091202.

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Kundt spacetimes are of great importance to general relativity. We show that a Kundt spacetime is a Lorentz manifold with a non-singular isotropic geodesic vector field having its orthogonal distribution integrable and determining a totally geodesic foliation. We give the local structure of Kundt spacetimes and some properties of left invariant Kundt structures on Lie groups. Finally, we classify all left invariant Kundt structures on three-dimensional simply connected unimodular Lie groups.

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Seidel, Paola Terezinha, and Luís Antonio Cabral. "Dualities and geometrical invariants for static and spherically symmetric spacetimes." International Journal of Modern Physics D 25, no. 09 (2016): 1641007. http://dx.doi.org/10.1142/s0218271816410078.

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In this work, we consider spinless particles in curved spacetime and symmetries related to extended isometries. We search for solutions of a generalized Killing equation whose structure entails a general class of Killing tensors. The conserved quantities along particle’s geodesic are associated with a dual description of the spacetime metric. In the Hamiltonian formalism, some conserved quantities generate a dual description of the metric. The Killing tensors belonging to the conserved objects imply in a nontrivial class of dual metrics even for a Schwarzschild metric in the original spacetime

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Thèses sur le sujet "Spacetime Structure"

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Knox, Eleanor. "Geometry, inertia and spacetime structure." Thesis, University of Oxford, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.527342.

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Blau, Steven Kennith. "Spacetime structure of the very early universe." Thesis, Massachusetts Institute of Technology, 1985. http://hdl.handle.net/1721.1/15300.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 1985.<br>MICROFICHE COPY AVAILABLE IN ARCHIVES AND SCIENCE.<br>Includes bibliographical references.<br>by Steven Kennith Blau.<br>Ph.D.

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Virtanen, Jukka Tapio. "Structure of elementary particles in non-archimedean spacetime." Diss., Restricted to subscribing institutions, 2009. http://proquest.umi.com/pqdweb?did=1835111791&sid=1&Fmt=2&clientId=1564&RQT=309&VName=PQD.

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Siwek, Alicja Anna. "On spacetime structure and symmetries in a strong gravitational field and in quantum field theory." Strasbourg, 2011. http://www.theses.fr/2011STRA6141.

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La thèse contient une étude de la structure et les symétries de l'espace-temps présentée de quelques perspectives différentes. Géodésiques de particules sont analysées dans les champs gravitationnels forts. Les orbites circulaires et l'existence de la sphère des photons sont considerés dans la géométrie de Schwarzschild et des espaces-temps « Schwarzschild-like », résultants de la gravité de Hořava-Lifshitz. Communication au moyen de signaux électromagnétiques radiaux est étudié dans la proximité de l'horizon des événements dans l'espace-temps de Schwarzschild, où Kruskal-Szekeres système de c

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Riedel, Gårding Elias. "Quantum structure of holographic black holes." Thesis, KTH, Fysik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-284694.

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We study a free quantum scalar field in the BTZ spacetime as a model of the AdS/CFT correspondence for black holes, and show the essential steps in computing Bogolyubov coefficients between modes on either side of the wormhole. As background, we review the BTZ geometry in standard, Kruskal and Poincaré coordinates, holographic renormalisation of the dual field theory and canonical quantisation in curved spacetime.<br>Vi studerar ett fritt skalärt kvantfält i BTZ-rumtiden som en modell av AdS/CFT-dualiteten för svarta hål och visar huvudstegen i beräkningen av Bogolyubov-koefficienter mellan mo

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Bergstedt, Viktor. "Spacetime as a Hamiltonian Orbit and Geroch's Theorem on the Existence of Fermions." Thesis, Uppsala universitet, Institutionen för fysik och astronomi, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-432488.

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Over a century since its inception, general relativity continues to lie at the heart of some of the most researched topics in theoretical physics. It seems likely that the coveted solutions to problems like quantum gravity are to be found in an extension of general relativity, one which may only be visible in an alternate formulation of the theory. In this thesis we consider the possibility of casting general relativity in the form of an initial value problem where spacetime is seen as the evolution of space. This evolution is shown to be constrained and of Hamiltonian type. Not all spacetim

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Poulain, Timothé. "On the quantum structure of spacetime and its relation to the quantum theory of fields : k-Poincaré invariant field theories and other examples." Thesis, Université Paris-Saclay (ComUE), 2018. http://www.theses.fr/2018SACLS331/document.

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De nombreuses approches à la gravité quantique suggèrent que la description usuelle de l’espace-temps ne serait pas adaptée à la description des phénomènes physiques impliquant à la fois des processus gravitationnels et quantiques. Une meilleure description pourrait consister à munir l’espace-temps d’une structure non-commutative en remplaçant les coordonnées locales sur la variété par des opérateurs ne commutant pas deux-à-deux. Il s’ensuit que le comportement des théories de champs construites sur de tels espaces diffère en général de celui des théories de champs ordinaires. L’étude de ces p

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Burtscher, Annegret Yvonne. "Analytic and geometric aspects of spacetimes of low regularity." Thesis, Paris 6, 2014. http://www.theses.fr/2014PA066345.

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La théorie de la relativité générale décrit l'effet de la gravitation en termes de géométrie des espaces-temps. La courbure des variétés lorentzienne est liée à l'énergie et l'évolution de la matière (ou du vide) par les équations d'Einstein, un système d'équations différentielles non-linéaires. Dans les années 1950, l'existence locale de solutions des équations d'Einstein a été établie. Motivé par ce résultat, j'étudie l'évolution ainsi que la régularité des espaces-temps. Il est démontré que certaines estimations d'énergie peuvent être contrôlées par des limites unilatérales portant uniqueme

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Tiglio, Manuel Humberto. "Cuerdas cósmicas y causalidad." Doctoral thesis, Digitalizado de: https://famaf.biblio.unc.edu.ar/cgi-bin/koha/opac-detail.pl?biblionumber=13379, 2000. http://hdl.handle.net/11086/22843.

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Tesis (Doctor en Física)--Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física, 2000.<br>Contenidos parciales: Cuerdas estáticas -- Cuerdas interactuando con campos de Einstein Maxwell -- Cuerdas con momento y CTCs eternas -- Holonomías y energía-momento -- Máquinas de tiempo -- Protección cronológica y gravedad cuántica.<br>Contenidos parciales: Cuerdas estáticas -- Cuerdas interactuando con campos de Einstein Maxwell -- Cuerdas con momento y CTCs eternas -- Holonomías y energía-momento -- Máquinas de tiempo -- Protección cronológica y gravedad cuántica.<br>publishedVe

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RAVERA, LUCREZIA. "Group Theoretical Hidden Structure of Supergravity Theories in Higher Dimensions." Doctoral thesis, Politecnico di Torino, 2018. http://hdl.handle.net/11583/2700157.

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L'obiettivo della mia tesi di dottorato è quello di esplorare simmetrie nascoste nelle teorie di supergravità. In questa direzione ho affrontato diversi temi di ricerca: da un lato mi sono dedicata all'analisi della struttura di gauge nascosta in teorie di supergravità in varie dimensioni di spazio-tempo e allo studio di un particolare modello in quattro dimensioni in presenza di un bordo spaziale non banale; dall'altro lato, mi sono focalizzata sui legami algebrici tra superalgebre di rilevanza nel campo della supergravità. Nei primi tre capitoli della tesi vengono forniti un'introduzione gen

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Livres sur le sujet "Spacetime Structure"

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Rickles, Dean. Symmetry, structure, and spacetime. Elsevier Science Pub, 2008.

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1933-, Carmeli Moshe, ed. Relativity: Modern large-scale spacetime structure of the cosmos. World Scientific, 2008.

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1933-, Carmeli Moshe, ed. Relativity: Modern large-scale spacetime structure of the cosmos. World Scientific, 2008.

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Paolo, Farinella, and Vokrouhlický David, eds. Physics of the solar system: Dynamics and evolution, space physics, and spacetime structure. Kluwer Academic Publishers, 2003.

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M, Burko Lior, Ori Amos, and Agudah ha-fisiḳalit le-Yiśraʼel, eds. Internal structure of black holes and spacetime singularities: An international research workshop, Haifa, June 29-July 3, 1997. Institute of Physics Pub., 1997.

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S, Letelier P., and Rodrigues W. A, eds. Gravitation: The spacetime structure : proceedings of the 8th Latin American Symposium on Relativity and Gravitation, Aguas de Lindóia, Brazil, 25-30 July 1993. World Scientific, 1994.

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Manchak, J. B. Global Spacetime Structure. Cambridge University Press, 2020.

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Manchak, J. B. Global Spacetime Structure. Cambridge University Press, 2020.

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Rickles, Dean. Symmetry, Structure, and Spacetime. Elsevier Science & Technology Books, 2007.

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Symmetry, Structure and Spacetime. Elsevier, 2008. http://dx.doi.org/10.1016/s1871-1774(07)x0300-0.

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Chapitres de livres sur le sujet "Spacetime Structure"

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Dodson, C. T. J. "Spacetime structure." In Categories, Bundles and Spacetime Topology. Springer Netherlands, 1988. http://dx.doi.org/10.1007/978-94-015-7776-2_5.

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Weatherall, James Owen. "Classical Spacetime Structure." In The Routledge Companion to Philosophy of Physics. Routledge, 2021. http://dx.doi.org/10.4324/9781315623818-6.

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Fletcher, Samuel C. "Relativistic Spacetime Structure." In The Routledge Companion to Philosophy of Physics. Routledge, 2021. http://dx.doi.org/10.4324/9781315623818-16.

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Slowik, Edward. "The Structure of Spacetime Theories." In Cartesian Spacetime. Springer Netherlands, 2002. http://dx.doi.org/10.1007/978-94-017-0975-0_3.

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Joshi, P. S. "Topics in Spacetime Structure." In Gravitation, Gauge Theories and the Early Universe. Springer Netherlands, 1989. http://dx.doi.org/10.1007/978-94-009-2577-9_7.

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Cosgrove, Joseph K. "The Historical Sense-Structure of Symbolic Algebra." In Relativity without Spacetime. Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-72631-1_4.

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Cosgrove, Joseph K. "The Historical Sense-Structure of Modern Algebraic Physics." In Relativity without Spacetime. Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-72631-1_5.

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Saller, Heinrich. "The Operational Structure of Spacetime." In Time, Quantum and Information. Springer Berlin Heidelberg, 2003. http://dx.doi.org/10.1007/978-3-662-10557-3_26.

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Coleman, Robert Alan, and Herbert Korté. "A New Semantics for the Epistemology of Geometry I: Modeling Spacetime Structure." In Reflections on Spacetime. Springer Netherlands, 1995. http://dx.doi.org/10.1007/978-94-017-2872-0_2.

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Stambaugh, Tamra, and Emily Mofield. "The Structure of Spacetime and Black Holes." In Space, Structure, and Story. Routledge, 2021. http://dx.doi.org/10.4324/9781003238102-8.

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Actes de conférences sur le sujet "Spacetime Structure"

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Letelier, P. S., and W. A. Rodrigues, Jr. "GRAVITATION: THE SPACETIME STRUCTURE." In 8th Latin American Symposium on Relativity and Gravitation. WORLD SCIENTIFIC, 1994. http://dx.doi.org/10.1142/9789814534901.

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VOLOVICH, IGOR V. "QUANTUM INFORMATION AND SPACETIME STRUCTURE." In Proceedings of the Fifth International Conference. WORLD SCIENTIFIC, 2006. http://dx.doi.org/10.1142/9789812774835_0002.

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Stoica, Ovidiu Cristinel. "The causal structure of spacetime singularities." In Proceedings of the MG14 Meeting on General Relativity. WORLD SCIENTIFIC, 2017. http://dx.doi.org/10.1142/9789813226609_0313.

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SHIMA, K., M. TSUDA, and M. SAWAGUCHI. "NONLINEAR SUPERSYMMETRIC STRUCTURE OF SPACETIME AND MATTER." In Proceedings of the MG10 Meeting held at Brazilian Center for Research in Physics (CBPF). World Scientific Publishing Company, 2006. http://dx.doi.org/10.1142/9789812704030_0127.

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Drachal, Krzysztof. "Spacetime Structure Implications from Quantum Mechanics and Relativity." In The 4th Electronic International Interdisciplinary Conference. Publishing Society, 2015. http://dx.doi.org/10.18638/eiic.2015.4.1.462.

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Reid, David D., and Hakeem M. Oluseyi. "Causal Sets: An Alternative View of Spacetime Structure." In 007. AIP, 2008. http://dx.doi.org/10.1063/1.2905136.

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Klinkhamer, F. R., Alfredo Macias, Claus Lämmerzahl, and Abel Camacho. "Small-Scale Structure of Spacetime: Bounds and Conjectures." In 2007. AIP, 2008. http://dx.doi.org/10.1063/1.2902784.

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Takacs, Adam, Daniel Pablos, and Konrad Tywoniuk. "Resolving the spacetime structure of jets with medium." In 10th International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions. Sissa Medialab, 2021. http://dx.doi.org/10.22323/1.387.0161.

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Khorrami, Yaser, Davood Fathi, Nasrin Razmjooei, and Raymond C. Rumpf. "Tunable Guided-mode resonance filter using Spacetime Periodic Structure." In 2022 International Conference on Numerical Simulation of Optoelectronic Devices (NUSOD). IEEE, 2022. http://dx.doi.org/10.1109/nusod54938.2022.9894771.

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Derpanis, Konstantinos G., Mikhail Sizintsev, Kevin Cannons, and Richard P. Wildes. "Efficient action spotting based on a spacetime oriented structure representation." In 2010 IEEE Conference on Computer Vision and Pattern Recognition (CVPR). IEEE, 2010. http://dx.doi.org/10.1109/cvpr.2010.5539874.

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Rapports d'organisations sur le sujet "Spacetime Structure"

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Lynch, James F. A digital Higgs universe and the flow of time. Woods Hole Oceanographic Institution, 2024. http://dx.doi.org/10.1575/1912/70830.

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Theoretically considering velocities greater than c implies considering an observer’s past and extends the overall analysis into the complex plane. By using a series of rotations by i in the complex plane at the Planck scale, one can create a four-lobed structure of “instants of time,” which together with considering matter and antimatter in the lobes and the +/- sense of the rotation, leads to a Higgs field representation of spacetime. A metric is developed for this system as well as a generalized spacetime interval. It is shown that the Friedmann Equations are consistent with our “Higgs Cosm

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Lynch, James F. A Higgs Universe and the flow of time. Woods Hole Oceanographic Institution, 2024. http://dx.doi.org/10.1575/1912/69338.

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Theoretically considering velocities greater than c implies considering an observer’s past and extends the overall analysis into the complex plane. By using a series of rotations by i in the complex plane, one can create a four-lobed structure of “instants of time,” which together with considering matter and antimatter in the lobes and the +/- sense of the rotation, leads to a Higgs field representation of space and time. A 10x10 metric is developed for this system as well as a generalized spacetime interval. It is also shown that the Friedmann Equations are consistent with our “Higgs Cosmolog

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