2018/06/28 by Gia Dvali, Cesar Gomez, César Gómez · 126 citations
Physics and Astronomy · #Black Holes and Theoretical Physics #Constant (computer programming) #Cosmological constant #Cosmological constant problem #Cosmology #Cosmology and Gravitation Theories #Dark energy #Inflation (cosmology) #Lambda-CDM model #Negative energy #Particle physics theoretical and experimental studies #Physics #Quantum #Quantum mechanics #String (physics) #String theory #Theoretical physics #Upper and lower bounds #Vacuum energy #astro-ph.CO #gr-qc #hep-th
paper · pdf · doi:10.1002/prop.201800092
published in Fortschritte der Physik 67(1-2) (Wiley) · 2 pages
arxiv created 2018/06/28 · openalex publication_date 2018/12/18 · arxiv updated 2021/07/28 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Some time ago we have suggested that positive vacuum energy exhibits a finite quantum break time, which can be a signal that a positive cosmological constant is inconsistent. From the requirement that Universe never undergoes through quantum breaking, we have derived an absolute lower bound on the speed of variation of positive vacuum energy. The same suggestion about exclusion of positive cosmological constant was made recently. We show that the new bound represents a particular string theoretic version of the old bound, which is more general. In this light, we show that the existing window still provides a large room for the inflationary and dark energy model building. In particular, the inflationary models with gravitational strength interactions, are protected against fast quantum breaking.