Boson mixing and flavor vacuum in the expanding Universe: a possible candidate for the dark energy

Abstract

We analyze the boson mixing in curved spacetime and compute the expectation value of the energy-momentum tensor of bosons on the flavor vacuum in spatially flat Friedmann-Lemaitre-Robertson-Walker metrics. We show that the energy-momentum tensor of the flavor vacuum behaves as the effective energy-momentum tensor of a perfect fluid. Assuming a fixed de Sitter background, we show that the equation of state can assume values in the interval [-1, 1], and, in the flat spacetime limit has a value -1, which is the one of the dark energy. The results here presented show that vacuum of mixed bosons like neutrino super-partners, can represent a possible component of the dark energy of the Universe.

19 pages, 2 figures

References in corpus (14)

• Dynamics of dark energy
• Unified cosmic history in modified gravity: from F(R) theory to Lorentz non-invariant models
• Dark Energy and the Accelerating Universe
• Approaches to Understanding Cosmic Acceleration
• Dark Energy and Dark Gravity
• Lemaitre-Tolman-Bondi model and accelerating expansion
• The cosmological constant from the ghost. A toy model
• Gluonic vacuum, q-theory, and the cosmological constant
• Neutrino mixing as a source of dark energy
• Dark energy and particle mixing
• Cosmological constant from quarks and torsion
• Axion-photon mixing in quantum field theory and vacuum energy
• The flavor vacuum in the expanding universe and dark matter
• Neutron Interferometry and axion like particles

Cited by in corpus (9)

• Slow-roll inflation and growth of perturbations in Kaniadakis modification of Friedmann cosmology
• Saez-Ballester gravity in Kantowski-Sachs Universe: a new reconstruction paradigm for Barrow Holographic Dark Energy
• Generalized interacting Barrow Holographic Dark Energy: cosmological predictions and thermodynamic considerations
• Lagrangian reconstruction of Barrow holographic dark energy in interacting tachyon model
• Nonextensive entropies impact onto thermodynamics and phase structure of Kerr-Newman black holes
• Kaniadakis entropy-based characterization of IceCube PeV neutrino signals
• Quantum Entropy-Driven Modifications to Holographic Dark Energy in $f(G,T)$ Gravity
• Time-energy uncertainty relation for neutrino oscillations: historical development, applications and future prospects
• Modified cosmology through generalized mass-to-horizon entropy: implications for structure growth and primordial gravitational waves