Cosmological quantum entanglement : A possible testbed for the existence of Kalb-Ramond field

Abstract

In the present paper, we explore the possible effects of a second rank antisymmetric tensor field, known as Kalb-Ramond (KR) field, on cosmological particle production as well as on quantum entanglement for a massive scalar field propagating in a four dimensional FRW spacetime evolves through a symmetric bounce. For this purpose, the scalar field is considered to be coupled with the KR field and also with the Ricci scalar via the term $\sim \xi R{\Phi }^2$ (with $\xi$ be the coupling). The presence of KR field spoils the conformal symmetry of a massless scalar field even for $\xi =1/6$ in four dimensional context, which has interesting consequences on particle production and consequently on quantum entanglement as we will discuss. In particular, the presence of KR field in a FRW bouncing universe allows a greater particle production and consequently the upper bound of the entanglement entropy becomes larger in comparison to the case when the KR field is absent. This may provide an interesting testbed for the existence of Kalb-Ramond field in our universe.

CQG accepted

References in corpus (12)

• Inflationary Cosmology
• Entangling Power of an Expanding Universe
• Exploring Bouncing Cosmologies with Cosmological Surveys
• Entanglement in an expanding spacetime
• Entanglement in curved spacetimes and cosmology
• Extended matter bounce scenario in ghost free $f(R,\mathcal{G})$ gravity compatible with GW170817
• Quantum Equivalence of Massive Antisymmetric Tensor Field Models in Curved Space
• $\Lambda$CDM Bounce Cosmology without $\Lambda$CDM: the case of modified gravity
• Bouncing cosmology from warped extra dimensional scenario
• Bouncing cosmology from Kalb-Ramond Braneworld
• Preserving Information from the Beginning to the End of time in a Robertson-Walker Spacetime
• Cosmology and entanglement

Cited by in corpus (3)

• Torsion in string-inspired cosmologies and the universe dark sector
• Torsion at different scales: from materials to the Universe
• Anisotropic power-law inflation for models of non-canonical scalar fields non-minimally coupled to a two-form field