Zobrazeno 1 - 10
of 26
pro vyhledávání: '"York Jr., James W."'
Publikováno v:
Phys.Rev.D75:084026,2007
Pointlike objects cause many of the divergences that afflict physical theories. For instance, the gravitational binding energy of a point particle in Newtonian mechanics is infinite. In general relativity, the analog of a point particle is a black ho
Externí odkaz:
http://arxiv.org/abs/gr-qc/0610088
Autor:
Jantzen, Robert T., York, Jr, James W.
Publikováno v:
Phys.Rev. D73 (2006) 104008
Based on the recent understanding of the role of the densitized lapse function in Einstein's equations and of the proper way to pose the thin sandwich problem, a slight readjustment of the minimal distortion shift gauge in the 3+1 approach to the dyn
Externí odkaz:
http://arxiv.org/abs/gr-qc/0603069
Publikováno v:
Phys.Rev. D72 (2005) 024022
Evaluating a functional integral exactly over a subset of metrics that represent the quantum fluctuations of the horizon of a black hole, we obtain a Schroedinger equation in null coordinate time for the key component of the metric. The equation yiel
Externí odkaz:
http://arxiv.org/abs/hep-th/0505125
Autor:
York Jr, James W.
Publikováno v:
Nuovo Cim.B119:823-837,2004
The complete form of the constraints following from their conformal structure is extended so as to include constant mean curvature and other mean curvature foliations. This step is demonstrated using the momentum phase space approach. This approach y
Externí odkaz:
http://arxiv.org/abs/gr-qc/0409102
We discuss several explicitly causal hyperbolic formulations of Einstein's dynamical 3+1 equations in a coherent way, emphasizing throughout the fundamental role of the ``slicing function,'' $\alpha$---the quantity that relates the lapse $N$ to the d
Externí odkaz:
http://arxiv.org/abs/gr-qc/9907099
Publikováno v:
Phys.Rev. D61 (2000) 084034
We consider the Einstein constraints on asymptotically euclidean manifolds $M$ of dimension $n \geq 3$ with sources of both scaled and unscaled types. We extend to asymptotically euclidean manifolds the constructive method of proof of existence. We a
Externí odkaz:
http://arxiv.org/abs/gr-qc/9906095
Autor:
Anderson, Arlen, York, Jr, James W.
Publikováno v:
Phys.Rev.Lett.82:4384-4387,1999
Einstein's equations for general relativity, when viewed as a dynamical system for evolving initial data, have a serious flaw: they cannot be proven to be well-posed (except in special coordinates). That is, they do not produce unique solutions that
Externí odkaz:
http://arxiv.org/abs/gr-qc/9901021
Autor:
York, Jr, James W.
Publikováno v:
Phys.Rev.Lett. 82 (1999) 1350-1353
The initial-value problem is posed by giving a conformal three-metric on each of two nearby spacelike hypersurfaces, their proper-time separation up to a multiplier to be determined, and the mean (extrinsic) curvature of one slice. The resulting equa
Externí odkaz:
http://arxiv.org/abs/gr-qc/9810051
Autor:
York, Jr, James W.
Studies of new hyperbolic systems for the Einstein evolution equations show that the ``slicing density'' $\alpha(t,x)$ can be freely specified while the lapse $N = \alpha g^{1/2}$ cannot. Implementation of this small change in the Arnowitt-Deser-Misn
Externí odkaz:
http://arxiv.org/abs/gr-qc/9807062
Autor:
Anderson, Arlen, York, Jr, James W.
Publikováno v:
Phys.Rev.Lett. 81 (1998) 1154-1157
Hamiltonian time evolution in terms of an explicit parameter time is derived for general relativity, even when the constraints are not satisfied, from the Arnowitt-Deser-Misner-Teitelboim-Ashtekar action in which the slicing density $\alpha(x,t)$ is
Externí odkaz:
http://arxiv.org/abs/gr-qc/9807041