PHANTOM UNIVERSE FROM CPT SYMMETRIC QFT

2005/12/06 by Alexander A. Andrianov, ALEXANDER A. ANDRIANOV, Francesco Cannata +3
Physics and Astronomy · #Advanced Differential Geometry Research #Black Holes and Theoretical Physics #Quantum Mechanics and Non-Hermitian Physics #astro-ph #gr-qc #hep-th

paper · pdf · doi:10.1142/s021827180600911x

published as Int.J.Mod.Phys. D15 (2006) 1299-1310

arxiv created 2005/12/06 · openalex publication_date 2006/08/01 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/01

Abstract

We develop a generalization of semiclassical field theory for the case of non-Hermitian Hamiltonians with CPT symmetry and construct a classical cosmological, scalar-field based model describing a smooth transition from ordinary dark energy to the phantom one. Our model arises from a Lagrangian with a complex potential leading to a non-trivial vacuum with real vacuum energy. Equivalence with models involving two scalar fields one of which is phantom-like is discussed.

Citations

• Reflectionless potentials and symmetry
• WMAP constraints on low redshift evolution of dark energy
• Measurements of Ω and Λ from 42 High‐Redshift Supernovae
• Cosmological Constant - the Weight of the Vacuum
• How to determine an effective potential for a variable cosmological term
• Cosmological evolution of a quintom model of dark energy
• Testing dark energy beyond the cosmological constant barrier
• Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
• A theoretician's analysis of the supernova data and the limitations in determining the nature of dark energy
• Complex Lagrangians and phantom cosmology
• Energy conditions and Segre classification of phantom fields
• Constraints on linear negative potentials in quintessence and phantom models from recent supernova data
• A Model‐Independent Determination of the Expansion and Acceleration Rates of the Universe as a Function of Redshift and Constraints on Dark Energy
• Solution of Schwinger-Dyson Equations for \cal PT-Symmetric Quantum Field Theory
• Generalized phantom energy
• Crossing the phantom divide: Dark energy internal degrees of freedom
• The Case for a Positive Cosmological Lambda-term
• Comparison of Approaches to Quantum Correction of Black Hole Thermodynamics