A Quintom scenario with mixed kinetic terms

Abstract

We examine an extension of the quintom scenario of dark energy, in which a canonical scalar field and a phantom field are coupled through a kinetic interaction. We perform a phase space analysis and show that the kinetic coupling gives rise to novel cosmological behaviour. In particular, we obtain both quintessence-like and phantom-like late-time solutions, as well as solutions that cross the phantom divide during the evolution of the universe.

11 pages, 4 figures, version published in Phys. Rev. D

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• Do cosmological observations allow a negative $\Lambda$?
• The past and future dynamics of quintom dark energy models
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• Cyclic cosmology from Lagrange-multiplier modified gravity
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• Phenomenological Varying Modified Chaplygin Gas with Variable $G$ and $\Lambda$: Toy Models for Our Universe
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• Self-interacting holographic dark energy
• Evading the theoretical no-go theorem for nonsingular bounces in Horndeski/Galileon cosmology
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• Non-singular Cyclic Cosmology without Phantom Menace
• Unified dark matter and dark energy description in a chiral cosmological model
• A Universe with a generalized ghost dark energy and Van der Waals fluid interacting with a fluid
• Scalar Dark Energy Models and Scalar-Tensor Gravity: Theoretical Explanations for the Accelerated Expansion of Present Universe
• Dynamics of entropy perturbations in assisted dark energy with mixed kinetic terms
• Multiscalar field cosmological model and possible solutions using Noether symmetry approach
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• Dynamical analysis for a scalar-tensor model with Gauss-Bonnet and non-minimal couplings
• A short review on Quintom dark energy theory
• Gravitational Coupling, Dynamical Changes of Units and The Cosmological Constant Problem
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• UV-complete and stable Quintom Dark Energy models in the light of DESI DR2
• Modified Power law Inflation: solution to the graceful exit problem and improvement of dark energy models
• A gap between two approaches of dimensional reduction for a six-dimensional Kaluza-Klein theory
• Quantum Quintom Cosmology