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10 papers · 2 filters
Supermassive Cosmic String Compactifications
Jose J. Blanco-Pillado, Borja Reina, Kepa Sousa +1
The space-time dimensions transverse to a static straight cosmic string with a sufficiently large tension (supermassive cosmic strings) are compact and typically have a singularity…
A quantum measure of the multiverse
Alexander Vilenkin
It has been recently suggested that probabilities of different events in the multiverse are given by the frequencies at which these events are encountered along the worldline of a…
Compactifying de Sitter Naturally Selects a Small Cosmological Constant
Adam R. Brown, Alex Dahlen, Ali Masoumi
We study compactifications of -dimensional de Sitter space with a -form flux down to dimensions. We show that for there are double-exponentially or…
Phenomenology of the Watcher measure in the Bousso-Polchinski landscape
Delia Schwartz-Perlov
We investigate the phenomenology of the "Watcher" measure in the Bousso-Polchinski landscape. We study a small toy landscape analytically. The results are sufficient to allow us to…
Non-singular bounce transitions in the multiverse
Jaume Garriga, Alexander Vilenkin, Jun Zhang
According to classical GR, negative-energy (AdS) bubbles in the multiverse terminate in big crunch singularities. It has been conjectured, however, that the fundamental theory may…
Casimir Energy Corrections by Light-Cone Fluctuations
E. Arias, C. H. G. Bessa, J. G. Dueñas +2
We study the effects of light-cone fluctuations on the renormalized zero-point energy associated with a free massless scalar field in the presence of boundaries. In order to simula…