Entanglement production in cosmology

Midwest Relativity Meeting 2016, Perimeter Institute for Theoretical Physics

Entanglement entropy provides a measure to quantify correlations in a quantum state, for instance of a scalar field representing matter on a cosmological background geometry. In this talk, I will discuss the time evolution of the entanglement entropy during inflation and reheating. I show that instabilities and parametric resonance can lead to a linear growth of the entanglement entropy in generic subsystems.