Gravitational waves attenuation in a non-perturbative spinorial vacuum (original) (raw)

Damping of gravitational waves in the nonperturbative spinor vacuum

arXiv (Cornell University), 2014

The propagation of gravitational waves on the background of a nonperturbative vacuum of a spinor field is considered. It is shown that there are several distinctive features in comparison with the propagation of plane gravitational waves through empty space: there exists the fixed phase difference between the hyy,zzh_{yy,zz}hyy,zz and hyzh_{yz}hyz components of the wave; there exists the damping of gravitational waves; for given frequency, there exist two waves with different wave vectors. We also discuss the possibility of experimental verification of the obtained effects as a tool to investigate nonperurbative quantum field theories. %The possible experimental verification of obtained results %as a tool to investigate nonperurbative effects is discussed. %It is shown that the experimental measurements of such waves give us the tools for the investigation of nonperurbative quantum field theories.

Gravitational waves and perspectives for quantum gravity

Modern Physics Letters A, 2014

Understanding the role of higher derivatives is probably one of the most relevant questions in quantum gravity theory. Already at the semiclassical level, when gravity is a classical background for quantum matter fields, the action of gravity should include fourth derivative terms to provide renormalizability in the vacuum sector. The same situation holds in the quantum theory of metric. At the same time, including the fourth derivative terms means the presence of massive ghosts, which are gauge-independent massive states with negative kinetic energy. At both classical and quantum level such ghosts violate stability and hence the theory becomes inconsistent. Several approaches to solve this contradiction were invented and we are proposing one more, which looks simpler than those what were considered before. We explore the dynamics of the gravitational waves on the background of classical solutions and give certain arguments that massive ghosts produce instability only when they are ...

Spin-1 gravitational waves. Theoretical and experimental aspects [gr-qc/0512159

2013

Exact solutions of Einstein field equations invariant for a non-Abelian 2-dimensional Lie algebra of Killing fields are described. Physical properties of these gravitational fields are studied, their wave character is checked by making use of covariant criteria and the observable effects of such waves are outlined. The possibility of detection of these waves with modern detectors, spherical resonant antennas in particular, is sketched.

The Electromagnetic Signature of Gravitational Wave Interaction with the Quantum Vacuum

An analysis of the effects of the passage of a gravitational wave on the quantum vacuum is made within the context of the Nexus paradigm of quantum gravity. Results indicate that if the quantum vacuum includes electrically charged virtual particle fields, then a gravitational wave will induce vacuum polarization.The equations of General Relativity are then reformulated to include electric charge displacements in the quantum vacuum imposed by an anisotropic stress-momentum tensor. It is then demonstrated that as a result of the space-time piezoelectric effect, a gravitational wave is associated with a rotating electromagnetic wave and that the converse effect produced by strong electromagnetic fields is responsible for the generation of relativistic jets and gamma ray bursts.Objects with strong electromagnetic fields will apparently violate the strong equivalence principle.