Results 11 to 20 of about 88,964 (204)

Covariant Generalisation of Codazzi-Raychaudhuri and Area Change Equations for Relativistic Branes [PDF]

, 1997
In this paper we derive the generalisations of Gauss-Codazzi, Raychaudhuri and area change equations for classical relativistic branes and multidimensional fluids in arbitrary background manifolds with metricity and torsion.
Barrabes, Barrabes, Barrabes, Boisseau, Capovilla, Capovilla, Carter, Carter, Carter, Carter, Carter, Carter, Chen, Chen, Eisenhart, Elias Zafiris, Ellis, Hartley, Hawking, Hindmarsh, Horowicz, Kibble, Kobayashi, Letelier, Raychaudhuri, Schouten, Stachel, Stachel, Stelle, Vilenkin, Wald   +30 more
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Static Observers in Curved Spaces and Non-inertial Frames in Minkowski Spacetime [PDF]

, 2010
Static observers in curved spacetimes may interpret their proper acceleration as the opposite of a local gravitational field (in the Newtonian sense).
C. Misner, C.-G. Huang, C.-G. Huang, D. Alba, D. Alba, D. Bini, D. Bini, D.J. McManus, E. Minguzzi, E. Minguzzi, E. Minguzzi, F. Dahia, G. Longhi, J.R. Letaw, K. Marzlin, L.G. Jensen, M. Pauri, M.A. Abramowicz, M.P. do Carmo, P. J. Felix da Silva, P.J.F. Silva da, R. Wald, S. Carroll, S. Gao, S. Sonego, S.S. Seahra, W. Rindler   +26 more
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Strings in gravity with torsion [PDF]

, 1999
A theory of gravitation in 4D is presented with strings used in the material action in $U_4$ spacetime. It is shown that the string naturally gives rise to torsion.
A. Papapetrou, A. Vilenkin, B. Carter, E. W. Mielke, F. W. Hehl, F. W. Hehl, F. W. Hehl, J. Scherk, J.-P. De Villiers, M. Kalb, N. Turok, R. T. Hammond, R. T. Hammond, R. T. Hammond, R. T. Hammond, Richard T. Hammond, T. Dereli   +16 more
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Cosmological Perturbation Theory Revisited [PDF]

, 2011
Increasingly accurate observations are driving theoretical cosmology toward the use of more sophisticated descriptions of matter and the study of nonlinear perturbations of FL cosmologies, whose governing equations are notoriously complicated.
Uggla, Claes, Wainwright, John
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Intrinsic alignments of galaxies in the MassiveBlack-II simulation: analysis of two-point statistics [PDF]

, 2015
The intrinsic alignment of galaxies with the large-scale density field is an important astrophysical contaminant in upcoming weak lensing surveys. We present detailed measurements of the galaxy intrinsic alignments and associated ellipticity-direction ...
Di Matteo, Tiziana, Feng, Yu, Khandai, Nishikanta, Mandelbaum, Rachel, Singh, Sukhdeep, Tenneti, Ananth   +5 more
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Dynamics of a self gravitating light-like matter shell: a gauge-invariant Lagrangian and Hamiltonian description [PDF]

, 2001
A complete Lagrangian and Hamiltonian description of the theory of self-gravitating light-like matter shells is given in terms of gauge-independent geometric quantities.
A. Ashtekar, A. Ashtekar, A. H. Taub, C. Barrabès, Ewa Czuchry, F. J. Belinfante, F. J. Belinfante, J. Jezierski, J. Kijowski, J. Kijowski, J. Kijowski, J. Kijowski, Jacek Jezierski, Jerzy Kijowski, L. Rosenfeld, M. Mars, P. Hájíček, P. Hájíček, P. Hájíček, P. Hájíček, P. Hájíček, P. Nurowski, W. Israel, W. Israel   +23 more
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"Squashed Entanglement" - An Additive Entanglement Measure

, 2003
In this paper, we present a new entanglement monotone for bipartite quantum states. Its definition is inspired by the so-called intrinsic information of classical cryptography and is given by the halved minimum quantum conditional mutual information over
Andreas Winter, Cerf N. J., Cerf N. J., Eisert J., Fannes M., Fuchs C. A., Hayden P. M., Horodecki M., Horodecki M., Jozsa R., Lieb E. H., Matthias Christandl, Maurer U., Popescu S., Rains E. M., Shor P. W., Uhlmann A., Vedral V., Vollbrecht K. G. H., Yura F.   +19 more
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The Physical Role of Gravitational and Gauge Degrees of Freedom in General Relativity - II: Dirac versus Bergmann observables and the Objectivity of Space-Time [PDF]

, 2004
(abridged)The achievements of the present work include: a) A clarification of the multiple definition given by Bergmann of the concept of {\it (Bergmann) observable.
A. Komar, B.F. Schutz, C. Rovelli, C.G. Torre, C.W. Misner, H. Weyl, I. Ciufolini, J. Earman, J. Ehlers, J. Stachel, J. Stachel, J. Stewart, J.D. Brown, L. Landau, L. Lusanna, Luca Lusanna, M. Pauri, M. Pauri, M. Pauri, M.H. Soffel, Massimo Pauri, N. Straumann, P.A.M. Dirac, P.G. Bergmann, P.G. Bergmann, P.G. Bergmann, P.G. Bergmann, S.S. Feng   +27 more
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Dynamical laws of superenergy in General Relativity

, 2007
The Bel and Bel-Robinson tensors were introduced nearly fifty years ago in an attempt to generalize to gravitation the energy-momentum tensor of electromagnetism.
Alfonso García-Parrado Gómez-Lobo, Anderson A, Bel L, Bel L, Bel L, Bel L, Bergqvist G, Bergqvist G, Bergqvist G, Chevreton M, Ellis G F R, Eriksson I, Eriksson I, Hawking S W, Herrera L, Herrera L, Jackson D, Klainerman S, Lazkoz R, Maartens R, Martín-García J M, Mashoon B, Naber G L, Penrose R, Penrose R Rindler W, Senovilla J M M, Senovilla J M M, Stephani H, Szabados L, Thorne K S   +29 more
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On the extension of the concept of Thin Shells to The Einstein-Cartan Theory [PDF]

, 2000
This paper develops a theory of thin shells within the context of the Einstein-Cartan theory by extending the known formalism of general relativity. In order to perform such an extension, we require the general non symmetric stress-energy tensor to be ...
Arkuszewski W, Barrabès C, Barrabès C, Barrabès C, Barrabès C, Bressange G F, Cartan E, Cartan E, Cartan E, G F Bressange, Kibble T W B, Lichnerowicz A, Sciama D W, Taub A H, Trautman A, Trautman A, Trautman A, Trautman A   +17 more
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