Quantum decoherence from stochastic backgrounds of gravitational waves

Brahim Lamine, R. Hervé, Astrid Lambrecht +1 more

J. L. Sánchez‐Gómez, J.L. Rosales

Eran Sinbar

Brahim Lamine, R. Hervé, Marc-Thierry Jaekel +2 more

We study how quantum correlations survive at large scales in spite of their exposition to stochastic backgrounds of gravitational waves. We consider Einstein-Podolski-Rosen (EPR) correlations built up on the polarizations of photon pairs and evaluate how they are affected by the cosmic gravitational wave background (CGWB). We evaluate the quantum decoherence of the EPR correlations in terms of a reduction of the violation of the Bell inequality as written by Clauser, Horne, Shimony and Holt (CHSH). We show that this decoherence remains small and that EPR correlations can in principle survive up to the largest cosmic scales.

Teodora Oniga

Serge Reynaud, Brahim Lamine, Astrid Lambrecht +2 more

We study the decoherence process associated with the scattering of stochastic gravitational waves. We discuss the case of macroscopic systems, such as the planetary motion of the Moon around the Earth, for which gravitational scattering is found to dominate decoherence though it has a negligible influence on damping. This contrast is due to the very high effective temperature of the background of gravitational waves in our galactic environment.