165 citations · 2.5k across the 85 of their papers we have counts for
12 papers · 1 filter
Cosmic F- and D-strings from pure Yang-Mills theory
Masaki Yamada, Kazuya Yonekura
We discuss the formation of cosmic strings or macroscopic color flux tubes after the deconfinement/confinement phase transition in the pure Yang-Mills theory. Based on holographic…
Cosmic strings from pure Yang-Mills theory
Masaki Yamada, Kazuya Yonekura
We discuss the formation of cosmic strings or macroscopic color flux tubes at the phase transition from the deconfinement to confinement phase in pure Yang-Mills (YM) theory, such…
4-volume cutoff measure of the multiverse
Alexander Vilenkin, Masaki Yamada
Predictions in an eternally inflating multiverse are meaningless unless we specify the probability measure. The scale-factor cutoff is perhaps the simplest and most successful meas…
Fundamental Forces and Scalar Field Dynamics in the Early Universe
Alexander Kusenko, Volodymyr Takhistov, Masaki Yamada +1
Scalar weak gravity conjectures (SWGCs) attempt to pinpoint the ranges of couplings consistent with a fundamental theory of all interactions. We identify a generic dynamical conseq…
Vacuum Decay in Real Time and Imaginary Time Formalisms
Mark P. Hertzberg, Masaki Yamada
We analyze vacuum tunneling in quantum field theory in a general formalism by using the Wigner representation. In the standard instanton formalism, one usually approximates the ini…
Hessian eigenvalue distribution in a random Gaussian landscape
Masaki Yamada, Alexander Vilenkin
The energy landscape of multiverse cosmology is often modeled by a multi-dimensional random Gaussian potential. The physical predictions of such models crucially depend on the eige…
Inflation in Random Landscapes with two energy scales
Jose J. Blanco-Pillado, Alexander Vilenkin, Masaki Yamada
We investigate inflation in a multi-dimensional landscape with a hierarchy of energy scales, motivated by the string theory, where the energy scale of Kahler moduli is usually assu…
Entanglement Entropy and Decoupling in the Universe
Yuichiro Nakai, Noburo Shiba, Masaki Yamada
In the expanding universe, two interacting fields are no longer in thermal contact when the interaction rate becomes smaller than the Hubble expansion rate. After decoupling, two s…
Inflation in multi-field random Gaussian landscapes
Ali Masoumi, Alexander Vilenkin, Masaki Yamada
We investigate slow-roll inflation in a multi-field random Gaussian landscape. The landscape is assumed to be small-field, with a correlation length much smaller than the Planck sc…
False Vacuum Decay Catalyzed by Black Holes
Kyohei Mukaida, Masaki Yamada
False vacuum states are metastable in quantum field theories, and true vacuum bubbles can be nucleated due to the quantum tunneling effect. It was recently suggested that an evapor…
Initial conditions for slow-roll inflation in a random Gaussian landscape
Ali Masoumi, Alexander Vilenkin, Masaki Yamada
In the landscape perspective, our Universe begins with a quantum tunneling from an eternally-inflating parent vacuum, followed by a period of slow-roll inflation. We investigate th…
Inflation in random Gaussian landscapes
Ali Masoumi, Alexander Vilenkin, Masaki Yamada
We develop analytic and numerical techniques for studying the statistics of slow-roll inflation in random Gaussian landscapes. As an illustration of these techniques, we analyze sm…