1. Quantum no-scale regimes and moduli dynamics
- Author
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Thibaut Coudarchet, Hervé Partouche, Centre de Physique Théorique [Palaiseau] ( CPHT ), École polytechnique ( X ) -Centre National de la Recherche Scientifique ( CNRS ), Laboratoire de Physique de l'ENS Lyon (Phys-ENS), École normale supérieure de Lyon (ENS de Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), Centre de Physique Théorique [Palaiseau] (CPHT), École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), and École normale supérieure - Lyon (ENS Lyon)-Université Claude Bernard Lyon 1 (UCBL)
- Subjects
High Energy Physics - Theory ,Nuclear and High Energy Physics ,media_common.quotation_subject ,FOS: Physical sciences ,torus ,General Relativity and Quantum Cosmology (gr-qc) ,supersymmetry: spontaneous symmetry breaking ,01 natural sciences ,General Relativity and Quantum Cosmology ,[ PHYS.HTHE ] Physics [physics]/High Energy Physics - Theory [hep-th] ,[ PHYS.GRQC ] Physics [physics]/General Relativity and Quantum Cosmology [gr-qc] ,Moduli ,phase space ,High Energy Physics - Phenomenology (hep-ph) ,Saddle point ,0103 physical sciences ,Attractor ,lcsh:Nuclear and particle physics. Atomic energy. Radioactivity ,moduli ,010306 general physics ,media_common ,Mathematical physics ,Heterotic string theory ,Physics ,big crunch ,[PHYS.HTHE]Physics [physics]/High Energy Physics - Theory [hep-th] ,deformation: marginal ,010308 nuclear & particles physics ,Big Crunch ,effective potential ,boundary condition ,Universe ,string model: heterotic ,Moduli space ,attractor ,High Energy Physics - Phenomenology ,collapse ,High Energy Physics - Theory (hep-th) ,[PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph] ,Phase space ,[PHYS.GRQC]Physics [physics]/General Relativity and Quantum Cosmology [gr-qc] ,moduli space ,lcsh:QC770-798 ,[ PHYS.HPHE ] Physics [physics]/High Energy Physics - Phenomenology [hep-ph] ,string: compactification - 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., 1+65 pages, 9 figures, 1 appendix
- Published
- 2018
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