## Search

Now showing items 1-9 of 9

#### Vacuum correlations in quantum gravity

(ELSEVIER SCIENCE BV, 1992)

We give a lowest-order estimation of some invariant correlation functions of quantized Einstein gravity in any dimension N > 2. The non-perturbative evaluation of such functions would play an important role in the Monte ...

#### The propagator in the radial gauge

(AMER INST PHYSICS, 1992)

The solutions of the equation for the propagator in the radial gauge x(mu)A(mu)(x) = 0 are studied. After finding a particular solution GAMMA(mu-rho)(x,y), the most general solution G(mu-rho)0(x,y) of the homogeneous ...

#### Geodesic round trips by parallel transport in quantum gravity

(AMERICAN PHYSICAL SOC, 1993)

We study the vacuum correlations of a gravitational field in any dimension N > 2 using the perturbative expansion to order G. It is known that the usual Green's functions are meaningless in quantum gravity; moreover, we ...

#### The radial gauge propagators in quantum gravity

(ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS, 1993)

We give a general procedure for extracting the propagators in gauge theories in the presence of a sharp gauge fixing and we apply it to derive the propagators in quantum gravity in the radial gauge, both in the first- and ...

#### On the motion of test particles in a fluctuating gravitational field

(AMER INST PHYSICS, 1992)

In this paper the "free fall" motion of a test tetrad in a weak gravitational field is studied. This is done with the intention of exploring the geometry locally through geodesics and parallel transport. By use of the ...

#### Radial gauge in poincare gauge field-theories

(AMER INST PHYSICS, 1990)

The generalization of the Fock–Schwinger or ‘‘radial’’ gauge condition xiAi =0 to the gauge theories of the Poincaré group, which describe the gravitational field, is treated. It is shown that the choice of a radial gauge ...

#### Effect of a scale-dependent cosmological term on the motion of small test particles in a Schwarzschild background

(ELSEVIER SCIENCE BV, 1999)

It was recently suggested that the gravitational action could contain a scale-dependent cosmological term, depending on the length or momentum scale characteristic of the processes under consideration. In this work we ...

#### Vacuum correlations in quantum gravity

(Springer, 1992)

We give a lowest-order estimation of some invariant correlation functions of quantized Einstein gravity in any dimension N > 2. The non-perturbative evaluation of such functions would play an important role in the Monte ...

#### General properties of the decay amplitudes for massless particles

(ELSEVIER SCIENCE BV, 1996)

We derive the kinematical constraints which characterize the decay of any massless particle in flat space-time. We show that in perturbation theory the decay probabilities of photons and Yang-Mills bosons vanish to all ...