Spacetime anisotropy affects cosmological entanglement

Abstract

Most existing cosmological entanglement studies are focused on the isotropic Robertson-Walker (RW) spacetime. Here we go beyond this limitation and study the influence of anisotropy on entanglement generated by dynamical spacetime. Since the isotropic spacetime is viewed as a background medium and the anisotropy is incorporated as perturbation, we decompose entanglement entropy into isotropic and anisotropic contributions. The latter is shown to be non-negligible by analyzing two cosmological models with weak and conformal coupling. We also show the possibility of using entanglement to infer about universe features.

14 pages

References in corpus (4)

• Entanglement of Dirac fields in non-inertial frames
• Entangling Power of an Expanding Universe
• Entanglement in an expanding spacetime
• Entanglement in curved spacetimes and cosmology

Cited by in corpus (7)

• Inflationary entanglement
• Geometric corrections to cosmological entanglement
• Quantum entanglement in cosmology
• Comparing geometric and gravitational particle production in Jordan and Einstein frames
• Entanglement in anisotropic expanding spacetime
• Cosmological quantum entanglement : A possible testbed for the existence of Kalb-Ramond field
• Parameter estimation in an anisotropic expanding spacetime