Quantum Gravity in Species Regime
arXiv:2103.15668
Abstract
A large number of particle species allows to formulate quantum gravity in a special double-scaling limit, the species limit. In this regime, quantum gravitational amplitudes simplify substantially. An infinite set of perturbative corrections, that usually blur the picture, vanishes, whereas the collective and non-perturbative effects can be cleanly extracted. Such are the effects that control physics of black holes and of de Sitter and their entanglement curves. In string theory example, we show that the entropy of open strings matches the Gibbons-Hawking entropy of a would-be de Sitter state at the point of saturation of the species bound. This shows, from yet another angle, why quantum gravity/string theory cannot tolerate a de Sitter vacuum. Finally, we discuss various observational implications.
arXiv comment23 pages, 3 figures
References in corpus (30)
- Towards Inflation in String Theory
- Information in Black Hole Radiation
- Primordial Black Holes as Dark Matter
- Quantum Gravity In De Sitter Space
- Quantum Compositeness of Gravity: Black Holes, AdS and Inflation
- Scales of Gravity
- Large-N bounds on, and compositeness limit of, gauge and gravitational interactions
- Black Hole Formation and Classicalization in Ultra-Planckian 2 -> N Scattering
- Black Hole Metamorphosis and Stabilization by Memory Burden
- Scrambling in the Black Hole Portrait
- Quantum Information and Gravity Cutoff in Theories with Species
- Black Hole Quantum Mechanics in the Presence of Species
- Entropy Bound and Unitarity of Scattering Amplitudes
- IIB or not IIB
- Classicality and Quantum Break-Time for Cosmic Axions
- Nature of Microscopic Black Holes and Gravity in Theories with Particle Species
- Black Hole Entropy and Gravity Cutoff
- A bound on the effective gravitational coupling from semiclassical black holes
- Area Law Micro-State Entropy from Criticality and Spherical Symmetry
- Finding Critical States of Enhanced Memory Capacity in Attractive Cold Bosons
- A Microscopic Model of Holography: Survival by the Burden of Memory
- Strings at Finite Temperature: Wilson Lines, Free Energies, and the Thermal Landscape
- On Corpuscular Theory of Inflation
- Consistent Cosmic Microwave Background Spectra from Quantum Depletion
- Model Independent Prediction of the Spectral Index of Primordial Quantum Fluctuations
- Breaking BEC
- Species and Strings
- De Sitter Quantum Breaking, Swampland Conjectures and Thermal Strings
- Thoughts on the Vacuum Energy in the Quantum N-Portrait
- Long-range correlation of CMB temperature fluctuations from the holographic entanglement entropy