Dark energy : from EFTs to supergravity / / Francesc Cunillera

• Autore: Cunillera Francesc
• Pubblicazione: Cham, Switzerland : , : Springer, , [2023]; ©2023
• Descrizione fisica: 1 online resource (227 pages)
• Disciplina: 523.1126
• Soggetto topico: Dark energy (Astronomy); Dark energy (Astronomy) - Research
• Nota di contenuto: Intro -- Supervisor's Foreword -- Abstract -- Publications Related to This Thesis -- Acknowledgements -- Contents -- 1 Introduction and Motivations -- 1.1 Outline -- 1.2 Further Resources -- 1.3 Units and Conventions -- References -- Part I String Inspired EFTs -- 2 Perturbative Supergravity in Type IIB Theories -- 2.1 Special Geometry of Kähler Manifolds -- 2.1.1 The Kähler Structure of mathcalMks -- 2.1.2 The Complex Structure of mathcalMcs -- 2.2 Perturbative mathcalN=2 Supergravity -- 2.3 Orientifolding the Supergravity Action -- 2.3.1 Truncating the Kähler Geometry -- 2.3.2 The Effective mathcalN=1 Action -- 2.4 Flux Compactifications -- 2.5 The Swampland Programme -- 2.5.1 The Swampland Distance Conjecture -- 2.5.2 The Refined de Sitter Conjecture -- References -- 3 Some Open Questions in Modern Cosmology -- 3.1 The Hierarchy Problem and Naturalness -- 3.2 The Cosmological Constant Problem -- 3.2.1 The Anthropic Principle -- 3.2.2 Sequestering the Vacuum Energy -- 3.2.3 Supersymmetry -- 3.2.4 The Flux Landscape -- 3.3 Coincidence Problem -- 3.3.1 Anthropic Considerations -- 3.3.2 K-Essence Scenarios -- References -- 4 A Naturally Light Dark Energy Model -- 4.1 Clockwork Mechanism -- 4.2 Dvali-Kaloper-Sorbo Four-Form Model -- 4.3 Obtaining a Naturally Light Dark Energy Scale -- 4.4 Warm-Up: A String Motivated Toy Model -- 4.5 A More In-Depth Look into Achieving the Embedding -- 4.6 Deconstructing Clockwork Dark Energy -- 4.7 Conclusions -- References -- 5 A Stringy Perspective on the Coincidence Problem -- 5.1 Generic Idea -- 5.2 A Toy Model -- 5.3 Further Discussion -- References -- 6 Intermezzo: Supergravity and the Swampland -- 6.1 A Simple Example of the Backreaction on Moduli Space -- 6.2 Calculations at the Boundary of Moduli Space -- 6.2.1 The Type IIB Runaway -- 6.2.2 The Type IIA Runaway -- 6.2.3 The Heterotic Runaway. ; 6.3 Divergence of String Diagrams and Perturbative Control or Lack Thereof -- 6.3.1 Perturbative and Non-perturbative Contributions Spoiling the Vacuum -- References -- Part II String Models -- 7 Corrections to the Supergravity Action in Type IIB -- 7.1 Review of Type IIB Effective Field Theory -- 7.2 Non-renormalisation Theorems -- 7.3 α'3 Corrections -- 7.4 One-Loop Corrections -- 7.5 Higher Derivative Corrections -- 7.6 Non-perturbative Corrections -- 7.7 Validity of the Effective Description -- 7.8 KKLT Model Building -- 7.9 Racetrack Model Building -- 7.10 LVS Model Building -- References -- 8 Obstructions to Quintessence Model Building -- 8.1 Old Challenges for Quintessence in String Theory -- 8.1.1 Fifth Forces and Radiative Instability -- 8.2 The KL Problem for Quintessence -- 8.2.1 Review of the KL Problem -- 8.2.2 Racetrack Solution to the KL Problem -- 8.2.3 General Implications for Quintessence -- 8.2.4 A Closer Look at Quintessence Models with a KL Problem -- 8.3 Axion Hilltop Quintessence and Initial Conditions -- 8.3.1 LVS Axion Hilltop Quintessence -- 8.3.2 Constraining Hilltops -- 8.3.3 Stochastic Effects and Initial Conditions -- 8.4 Discussion -- References -- 9 Gauss-Bonnet Curvature Corrections and the Absence of de Sitter Vacua -- 9.1 Review of Flux Compactifications of the Heterotic String Action and Stability Conditions -- 9.2 Extending the Montero-van Riet-Venken Bound in the Small Gauss-Bonnet Coupling Limit -- 9.3 Non-perturbative Conditions for the Existence of de Sitter Solutions with a Gauss-Bonnet Term -- 9.3.1 Internal Flux -- 9.3.2 External Flux -- 9.4 Discussion -- References -- 10 Conclusions and Outlooks -- References -- Appendix A Details and Calculations for Type IIB Supergravity -- A.1 Calculations for the Dimensional Reduction of the script upper N equals 2mathcalN=2 Type IIB Action. ; A.1.1 The Dimensional Reduction of the NSNS Sector -- A.1.2 The Dimensional Reduction of the RR Sector -- A.2 Dualising the upper C 2C2 and upper B 2B2 Axions -- Appendix B Type IIA Perturbative Supergravity -- B.1 script upper N equals 2mathcalN=2 Supergravity Action -- B.1.1 The RR Sector and the Topological Term of the Type IIA Action -- B.1.2 Dualising the upper B 2B2 and upper C 3C3 Fields -- B.2 Orientifolding and script upper N equals 1mathcalN=1 Type IIA Supergravity -- B.2.1 The Kähler Structure of script upper M overTilde Superscript k stildemathcalMks -- B.2.2 The Quaternionic Structure of script upper M overTilde Superscript upper QtildemathcalMQ -- B.3 The Type IIA script upper N equals 1mathcalN=1 Effective Action -- B.4 Type IIA Flux Compactifications -- B.5 Moduli Stabilisation in Type IIA Flux Supergravity -- References.
• Titolo autorizzato: Dark Energy
• ISBN: 9783031214684; 9783031214677
• Formato: Materiale a stampa
• Livello bibliografico: Monografia
• Lingua di pubblicazione: Inglese
• Record Nr.: 9910639887503321
• Lo trovi qui: Univ. Federico II
• Serie: Springer Theses