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Progress on Cosmological Magnetic Fields
Tanmay Vachaspati
A variety of observations impose upper limits at the nano Gauss level on magnetic fields that are coherent on inter-galactic scales while blazar observations indicate a lower bound…
Quantum Formation of Topological Defects
Mainak Mukhopadhyay, Tanmay Vachaspati, George Zahariade
We consider quantum phase transitions with global symmetry breakings that result in the formation of topological defects. We evaluate the number densities of kinks, vortices, and m…
Emergence of classical structures from the quantum vacuum
Mainak Mukhopadhyay, Tanmay Vachaspati, George Zahariade
After a quantum phase transition the quantum vacuum can break up to form classical topological defects. We examine this process for scalar field models with symmetry for diff…
Decay of Cosmic Global String Loops
Ayush Saurabh, Tanmay Vachaspati, Levon Pogosian
We numerically study the decay of cosmic global string loops due to radiation of Goldstone bosons and massive scalar () particles. The length of loops we study range from 200-10…