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Stochastic gravitational wave background from smoothed cosmic string loops
Jose J. Blanco-Pillado, Ken D. Olum
We do a complete calculation of the stochastic gravitational wave background to be expected from cosmic strings. We start from a population of string loops taken from simulations,…
New limits on cosmic strings from gravitational wave observation
Jose J. Blanco-Pillado, Ken D. Olum, Xavier Siemens
We combine new analysis of the stochastic gravitational wave background to be expected from cosmic strings with the latest pulsar timing array (PTA) limits to give an upper bound o…
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…