arXiv subjects

R. Kaya

Publications and source records attributed to R. Kaya.

3 recordsLinked to original sources

arXiv2018

Einstein gravity with torsion induced by the scalar field

We couple a conformal scalar field in (2+1) dimensions to Einstein gravity with torsion. The field equations are obtained by a variational principle. We could not solve the Einstein and Cartan equations analytically. These equations are solved numerically with 4th order Runge-Kutta method. From the numerical solution, we make an ansatz for the rotation parameter in the proposed metric, which gives an analytical solution for the scalar field for asymptotic regions.

gr-qc↗

arXiv1998

Quantum fluctuations of some gravitational waves

We review our previous work on the the calculation of the stress-energy tensor for a scalar particle in the background metric of different types of spherical impulsive, spherical shock and plane impulsive gravitational waves.

gr-qc↗

arXiv1998

Comparison of Exact and perturbative Results for Two Metrics

We compare the exact and perturbative results in two metrics and show that the spurious effects due to the perturbation method do not survive for physically relevant quantities such as the vacuum expectation value of the stress-energy tensor.

gr-qc↗