Quantum no-scale regimes and moduli dynamics

Abstract

We analyze quantum no-scale regimes (QNSR) in perturbative heterotic string compactified on tori, with total spontaneous breaking of supersymmetry. We show that for marginal deformations initially at any point in moduli space, the dynamics of a flat, homogeneous and isotropic universe can always be attracted to a QNSR. This happens independently of the characteristics of the 1-loop effective potential $V_{1-loop}$, which can be initially positive, negative or vanishing, and maximal, minimal or at a saddle point. In all cases, the classical no-scale structure is restored at the quantum level, during the cosmological evolution. This is shown analytically by considering moduli evolutions entirely in the vicinity of their initial values. Global attractor mechanisms are analyzed numerically and depend drastically on the sign of $V_{1-loop}$. We find that all initially expanding cosmological evolutions along which $V_{1-loop}$ is positive are attracted to the QNSR describing a flat, ever-expanding universe. On the contrary, when $V_{1-loop}$ can reach negative values, the expansion comes to a halt and the universe eventually collapses into a Big Crunch, unless the initial conditions are tuned in a tiny region of the phase space. This suggests that flat, ever-expanding universes with positive potentials are way more natural than their counterparts with negative potentials.

arXiv comment1+65 pages, 9 figures, 1 appendix

References in corpus (39)

• Accelerating Cosmologies from Compactification
• Accelerating Cosmologies from S-Branes
• Perturbative and Non-Perturbative Partial Supersymmetry Breaking; N=4 -> N=2 -> N=1
• Cosmology with positive and negative exponential potentials
• A Study of Accelerating Cosmologies from Superstring/M theories
• Hyperbolic Space Cosmologies
• Accelerating cosmologies from M/String theory compactifications
• Towards a Non-Supersymmetric String Phenomenology
• Vacuum Energy Cancellation in a Non-supersymmetric String
• Exact solution of scalar field cosmology with exponential potentials and transient acceleration
• Accelerating Cosmologies from Exponential Potentials
• String Duality and Non-supersymmetric Strings
• Orientifolds of Non-Supersymmetric Asymmetric Orbifolds
• Non-Supersymmetric Type I Strings with Zero Vacuum Energy
• Accelerating Cosmologies and a Phase Transition in M-Theory
• Cosmological Scaling Solutions and Multiple Exponential Potentials
• On Climbing Scalars in String Theory
• Non-perturbative Temperature Instabilities in N=4 Strings
• Chiral Heterotic Strings with Positive Cosmological Constant
• Super no-scale models in string theory
• Cosmology as Geodesic Motion
• Bose-Fermi Degeneracy and Duality in Non-Supersymmetric Strings
• Scalar Cosmology with Multi-exponential Potentials
• On exponential suppression of the cosmological constant in non-SUSY strings at two loops and beyond
• GUT Precursors and Entwined SUSY: The Phenomenology of Stable Non-Supersymmetric Strings
• Transient Quintessence from Group Manifold Reductions or how all roads lead to Rome
• Thermal/quantum effects and induced superstring cosmologies
• Cosmological Phases of the String Thermal Effective Potential
• Induced superstring cosmologies and moduli stabilization
• Inflationary Cosmologies from Compactification?
• Two-Loop Superstrings on Orbifold Compactifications
• Attraction to a radiation-like era in early superstring cosmologies
• Non-supersymmetric Asymmetric Orbifolds with Vanishing Cosmological Constant
• Superstring cosmology for N_4 = 1 -> 0 superstring vacua
• N=2 -> 0 super no-scale models and moduli quantum stability
• More on Non-supersymmetric Asymmetric Orbifolds with Vanishing Cosmological Constant
• Massless D-strings and moduli stabilization in type I cosmology
• Quantum no-scale regimes in string theory
• Late-time Cosmic Dynamics from M-theory

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• Interpolation and Exponentially Suppressed Cosmological Constant in Non-Supersymmetric Heterotic Strings with General ${\mathbb{Z}}_2$ Twists
• Type 0 ${\mathbb{Z}}_2\times {\mathbb{Z}}_2$ Heterotic String Orbifolds and Misaligned Supersymmetry
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