Zobrazeno 1 - 10
of 42
pro vyhledávání: '"de Alwis, Senarath"'
We consider vacuum transitions by bubble nucleation among 4D vacua with different values and signs of the cosmological constant $\Lambda $, including both up and down tunnelings. Following the Hamiltonian formalism, we explicitly compute the decay ra
Externí odkaz:
http://arxiv.org/abs/2307.13614
The spatial curvature of the universe is not yet known. Even though at present the Universe is very close to being essentially flat and most signatures of curvature appear to have been diluted by inflation, if the number of e-foldings during inflatio
Externí odkaz:
http://arxiv.org/abs/2112.11650
Publikováno v:
Phys. Rev. D 104, 026013 (2021)
We consider the generalisation of quantum tunneling transitions in the WKB approximation to the time-independent functional Schr\"odinger and Wheeler-DeWitt equations. Following a Lorentzian approach, we compute the transition rates among different s
Externí odkaz:
http://arxiv.org/abs/2011.13936
Quantum transitions among de Sitter and Minkowski spacetimes through bubble nucleation are revisited using the Hamiltonian formalism. We interpret tunnelling probabilities as relative probabilities: the ratio of the squared wave functionals $\mathcal
Externí odkaz:
http://arxiv.org/abs/1909.01975
Autor:
de Alwis, Senarath, Eichhorn, Astrid, Held, Aaron, Pawlowski, Jan M., Schiffer, Marc, Versteegen, Fleur
Publikováno v:
Phys.Lett. B798 (2019) 134991
We propose a scenario with string theory in the deep ultraviolet, an intermediate asymptotically safe scaling regime for gravity and matter, and the Standard Model in the infrared. This could provide a new perspective to tackle challenges of the two
Externí odkaz:
http://arxiv.org/abs/1907.07894
Publikováno v:
Fortschr. Phys. 2018, 1800079
De Sitter solutions have been recently conjectured to be incompatible with quantum gravity. In this paper we critically assess the progress and challenges of different mechanisms to obtain de Sitter vacua in string compactifications and compare them
Externí odkaz:
http://arxiv.org/abs/1808.08967
Akademický článek
Tento výsledek nelze pro nepřihlášené uživatele zobrazit.
K zobrazení výsledku je třeba se přihlásit.
K zobrazení výsledku je třeba se přihlásit.
The leading order dynamics of the type IIB Large Volume Scenario is characterised by the interplay between $\alpha'$ and non-perturbative effects which fix the overall volume and all local blow-up modes leaving (in general) several flat directions. I
Externí odkaz:
http://arxiv.org/abs/1607.01395
Publikováno v:
JHEP {\bf 07}, 036 (2015)
We present a general discussion of the properties of three dimensional CFT duals to the AdS string theory vacua coming from type IIB Calabi-Yau flux compactifications. Both KKLT and Large Volume Scenario (LVS) minima are considered. In both cases we
Externí odkaz:
http://arxiv.org/abs/1412.6999
We study the structure of the supersymmetric moduli spaces of ${\cal N}=1$ and ${\cal N}=2$ supergravity theories in $AdS_4$ backgrounds. In the ${\cal N}=1$ case, the moduli space cannot be a complex submanifold of the K\"ahler field space, but is i
Externí odkaz:
http://arxiv.org/abs/1312.5659