92 citations · 496 across the 26 of their papers we have counts for
26 papers
Can Light Dark Matter Solve the Core-Cusp Problem?
Heling Deng, Mark P. Hertzberg, Mohammad Hossein Namjoo +1
Recently there has been much interest in light dark matter, especially ultra-light axions, as they may provide a solution to the core-cusp problem at the center of galaxies. Since…
Generalized surface tension bounds in vacuum decay
Ali Masoumi, Sonia Paban, Erick J. Weinberg
Coleman and De Luccia (CDL) showed that gravitational effects can prevent the decay by bubble nucleation of a Minkowski or AdS false vacuum. In their thin-wall approximation this h…
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…
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…
The WKB approximation and tunneling in theories with non-canonical kinetic terms
Mariana Carrillo Gonzalez, Ali Masoumi, Adam R. Solomon +1
Tunneling is a fascinating aspect of quantum mechanics that renders the local minima of a potential meta-stable, with important consequences for particle physics, for the early hot…
Approximating tunneling rates in multi-dimensional field spaces
Ali Masoumi, Ken D. Olum, Jeremy M. Wachter
Quantum mechanics makes the otherwise stable vacua of a theory metastable through the nucleation of bubbles of the new vacuum. This in turn causes a first order phase transition. T…