Results 1 to 10 of about 20,671 (67)

A new look at loop quantum gravity [PDF]

, 2010
I describe a possible perspective on the current state of loop quantum gravity, at the light of the developments of the last years. I point out that a theory is now available, having a well-defined background-independent kinematics and a dynamics ...
Alesci E, Ashtekar A, Ashtekar A, Bahr B, Barrett J W, Barrett J W Dowdall R J Fairbairn W J Gomes H Hellmann F, Barrett J W Dowdall R J Fairbairn W J Hellmann F Pereira R, Bianchi E, Bianchi E, Bianchi E, Bianchi E Donà P Speziale S, Bojowald M, Bonzom V, Carlo Rovelli, Colosi D, Ding Y, Ding Y, Dittrich B Ryan J P, Flori C, Flori C Thiemann T, Freidel L, Freidel L Speziale S, Giesel K, Henderson A Rovelli C Vidotto F Wilson-Ewing E, Kaminski W, Kaminski W, Oeckl R, Oriti D, Oriti D Tlas T, Penrose R, Pereira R, Rivasseau V, Rovelli C, Rovelli C, Rovelli C, Rovelli C Smerlak M, Thiemann T   +36 more
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Quantum Geometry and its Implications for Black Holes [PDF]

, 2006
General relativity successfully describes space-times at scales that we can observe and probe today, but it cannot be complete as a consequence of singularity theorems.
Arnowitt R., Ashtekar A., Bojowald M., Bojowald M., Douglas M., MARTIN BOJOWALD, Nietzsche F., Vereshchagin G. V.   +7 more
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The Geometry of Black Hole singularities [PDF]

, 2014
Recent results show that important singularities in General Relativity can be naturally described in terms of finite and invariant canonical geometric objects. Consequently, one can write field equations which are equivalent to Einstein's at non-singular
Stoica, Ovidiu Cristinel
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What is General Relativity? [PDF]

, 2017
General relativity is a set of physical and geometric principles, which lead to a set of (Einstein) field equations that determine the gravitational field, and to the geodesic equations that describe light propagation and the motion of particles on the ...
Coley, Alan A., Wiltshire, David L.
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Simple quantum cosmology: Vacuum energy and initial state

, 2005
A static non-singular 10-dimensional closed Friedmann universe of Planck size, filled with a perfect fluid with an equation of state with w = -2/3, can arise spontaneously by a quantum fluctuation from nothing in 11-dimensional spacetime.
D. Spergel, D. Youm, E. Elbaz, M. Novello, M. Tegmark, S. Alexander, S. Eidelman, T. R. Mongan, T.R. Mongan   +8 more
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Can chaos be observed in quantum gravity?

, 2017
Full general relativity is almost certainly 'chaotic'. We argue that this entails a notion of nonintegrability: a generic general relativistic model, at least when coupled to cosmologically interesting matter, likely possesses neither differentiable ...
Dittrich, Bianca, Hoehn, Philipp A., Koslowski, Tim A., Nelson, Mike I.   +3 more
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Loop quantum gravity corrections to gravitational wave dispersion [PDF]

, 1997
Cosmological tensor perturbations equations are derived for Hamiltonian cosmology based on Ashtekar's formulation of general relativity, including typical quantum gravity effects in the Hamiltonian constraint as they are expected from loop quantum ...
Bojowald, Martin, Hossain, Golam Mortuza
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Relational Motivation for Conformal Operator Ordering in Quantum Cosmology

, 2009
Operator-ordering in quantum cosmology is a major as-yet unsettled ambiguity with not only formal but also physical consequences. We determine the Lagrangian origin of the conformal invariance that underlies the conformal operator-ordering choice in ...
Anderson, Edward
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Loop Quantum Gravity: Four Recent Advances and a Dozen Frequently Asked Questions

, 2007
As per organizers' request, my talk at the 11th Marcel Grossmann Conference consisted of two parts. In the first, I illustrated recent advances in loop quantum gravity through examples.
Ashtekar, Abhay
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Numerical Approaches to Spacetime Singularities [PDF]

, 2002
This Living Review updates a previous version which its itself an update of a review article. Numerical exploration of the properties of singularities could, in principle, yield detailed understanding of their nature in physically realistic cases ...
A A Kirillov, A A Kirillov, A A Moser, A Ashtekar, A B Burd, A Bonanno, A D Rendall, A D Rendall, A D Rendall, A E Motter, A H Norton, A M Abrahams, A M Abrahams, A Ori, A Ori, A Ori, A Ori, A Ori, A P Gentle, A Taub, A Zardecki, B Grubišić, B Grubišić, B Grubišić, B K Berger, B K Berger, B K Berger, B K Berger, B K Berger, B K Berger, B K Berger, B K Berger, B K Berger, B K Berger, B K Berger, B K Berger, B K Berger, B K Berger, B K Berger, B K Berger, B K Berger, B K Berger, B K Berger, B K Berger, C Barrabès, C Gundlach, C Gundlach, C Gundlach, C Gundlach, C Gundlach, C Gundlach, C M Chambers, C M Chambers, C M Chambers, C R Evans, C W Misner, D Christodoulou, D Christodoulou, D Eardley, D Eardley, D F Chernoff, D Garfinkle, D Garfinkle, D Garfinkle, D Garfinkle, D Garfinkle, D Garfinkle, D Garfinkle, D Garfinkle, D Garfinkle, D M Eardley, D Maison, D R Brill, D S Goldwirth, D V Gal’tsov, D V Gal’tsov, D W Hobill, E E Donets, E Kasner, E Poisson, E Poisson, E Poisson, E Seidel, E W Hirschmann, E W Hirschmann, E W Hirschmann, F Echeverria, F J Tipler, F Mellor, F Mellor, F Pretorius, G F R Ellis, G Francisco, G Johnson, G Montani, G Rein, H Elst van, H Friedrich, H Iguchi, H Iguchi, H Iguchi, H Ringström, H Ringström, I M Khalatnikov, I Olabarrieta, J A Fleck, J A Isenberg, J C Niemeyer, J D Barrow, J D Barrow, J Isenberg, J Libson, J Masso, J Pullin, J Wojtkiewicz, J Yokoyama, K Ferraz, K Nakao, K P Tod, K S Thorne, L Andersson, L M Burko, L M Burko, L M Burko, L M Burko, L M Burko, L M Burko, L S Finn, M A Pelath, M Bañados, M H P M Putten van, M L Gnedin, M MacCallum, M P Ryan Jr., M P Ryan Jr., M Suzuki, M Suzuki, M W Browne, M W Choptuik, M W Choptuik, M Weaver, M Weaver, M Weaver, M Weaver, N Deruelle, N J Cornish, N J Cornish, O Iguchi, P Anninos, P Anninos, P Bizoń, P Bizoń, P Bizoń, P Bizoń, P Breitenlohner, P Breitenlohner, P Breitenlohner, P Halpern, P Hübner, P Hübner, P K-H Ma, P R Brady, P R Brady, P R Brady, P R Brady, P R Brady, P R Brady, P T Chrusciel, P T Chruściel, R Bartnik, R Carretero-Gonzalez, R H Gowdy, R M Wald, R M Wald, R Ove, R Penrose, R Penrose, R S Hamadé, R S Hamadé, R Schoen, R T Jantzen, R T Jantzen, S A Teukolsky, S Chandrasekhar, S Cotsakis, S D Hern, S Droz, S E Rugh, S E Rugh, S E Rugh, S Hod, S Hod, S Hod, S Hod, S Hod, S Husa, S J Hern, S Kichenassamy, S L Liebling, S L Shapiro, S L Shapiro, S L Shapiro, S M C V Gonçalves, S W Hawking, S W Hawking, S W Hawking, T Chiba, T Chiba, T Damour, T Damour, T Harada, T Harada, T Koike, T Nakamura, T Nakamura, T Nakamura, V A Belinskii, V A Belinskii, V A Belinskii, V A Belinskii, V A Belinskii, V A Belinskii, V A Belinskii, V G LeBlanc, V G LeBlanc, V Moncrief, V Moncrief, V Moncrief, V Moncrief, W H Press, W Israel, W Israel, Z B Belanger   +232 more
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