Results 151 to 160 of about 1,197,617 (246)

Perturbative Quantum Gravity and its Relation to Gauge Theory

open access: yesLiving Reviews in Relativity, 2002
In this review we describe a non-trivial relationship between perturbative gauge theory and gravity scattering amplitudes. At the semi-classical or tree-level, the scattering amplitudes of gravity theories in flat space can be expressed as a sum of ...
Bern Zvi
doaj  

Horizon phase spaces in general relativity

open access: yesJournal of High Energy Physics
We derive a prescription for the phase space of general relativity on two intersecting null surfaces using the null initial value formulation. The phase space allows generic smooth initial data, and the corresponding boundary symmetry group is the ...
Venkatesa Chandrasekaran   +1 more
doaj   +1 more source

Discrete Approaches to Quantum Gravity in Four Dimensions

open access: yesLiving Reviews in Relativity, 1998
The construction of a consistent theory of quantum gravity is a problem in theoretical physics that has so far defied all attempts at resolution. One ansatz to try to obtain a non-trivial quantum theory proceeds via a discretization of space-time and the
Loll Renate
doaj  

The Thermodynamics of Black Holes

open access: yesLiving Reviews in Relativity, 2001
We review the present status of black hole thermodynamics. Our review includes discussion of classical black hole thermodynamics, Hawking radiation from black holes, the generalized second law, and the issue of entropy bounds.
Wald Robert M.
doaj  

Testing General Relativity with Pulsar Timing

open access: yesLiving Reviews in Relativity, 2003
Pulsars of very different types, including isolated objects and binaries (with short- and long-period orbits, and white-dwarf and neutron-star companions) provide the means to test both the predictions of general relativity and the viability of alternate
Stairs Ingrid H.
doaj  

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