# Polarized backgrounds of relic gravitons

@article{Giovannini2019PolarizedBO, title={Polarized backgrounds of relic gravitons}, author={Massimo Giovannini}, journal={Physical Review D}, year={2019} }

The polarizations of the tensor modes of the geometry evolving in cosmological backgrounds are treated as the components of a bispinor whose dynamics follows from an appropriate gauge-invariant action. This novel framework bears a close analogy with the (optical) Jones calculus and leads to a compact classification of the various interactions able to polarize the relic gravitons.

## 2 Citations

Effective energy density of relic gravitons

- PhysicsPhysical Review D
- 2019

The energy density, the pressure and the anisotropic stress of the relic gravitons do not have a unique gauge-invariant and frame-invariant expression since the equivalence principle ultimately…

## References

SHOWING 1-10 OF 36 REFERENCES

Spectra of relic gravitons and the early history of the Hubble parameter.

- PhysicsPhysical review. D, Particles and fields
- 1991

It is shown how one can reconstruct the time dependence of the very early Hubble parameter and matter energy density from a measured frequency-dependent spectrum of relic gravitational waves.

Conserved cosmological structures in the one-loop superstring effective action

- Physics
- 2000

A generic form of a low-energy effective action of superstring theories with one-loop quantum corrections is well known. Based on this action we derive the complete perturbation equations and general…

Effective field theory for inflation

- Physics
- 2008

The methods of effective field theory are used to study generic theories of inflation with a single inflaton field. For scalar modes, the leading corrections to the R correlation function are found…

String theoretic axion coupling and the evolution of cosmic structures

- Physics
- 2000

We examine the effects of the axion coupling to RRon the evolution of cosmic structures. It is shown that the evolutions of the scalar- and vector-type perturbations are not affected by this axion…

Graviton Creation by Small Scale Factor Oscillations in an Expanding Universe

- Physics
- 2016

We treat quantum creation of gravitons by small scale factor oscillations around the average of an expanding universe. Such oscillations are predicted both by modied gravity theories with a term…

Quantum Fields in Curved Space

- Physics
- 1980

This book presents a comprehensive review of the subject of gravitational effects in quantum field theory. Although the treatment is general, special emphasis is given to the Hawking black hole…

Quantized Gravitational Wave Perturbations in Robertson-Walker Universes

- Physics
- 1977

We consider the theory of quantized gravitational wave perturbations in the three types of Robertson-Walker universes. In a gauge analogous to the Coulomb gauge in electrodynamics it is possible to…

Chern-Simons modification of general relativity

- Physics
- 2003

General relativity is extended by promoting the three-dimensional gravitational Chern-Simons term to four dimensions. This entails choosing an embedding coordinate v_\mu -- an external quantity,…

Cosmological signature of new parity violating interactions

- Physics
- 1999

Are there any manifestations of parity violation other than those observed in weak interactions? A map of the cosmic microwave background (CMB) temperature and polarization will provide a new…