15 citations · 15 across the 4 of their papers we have counts for
5 papers
High-frequency Gravitational Waves from Superstring Phases in the Early Universe
Joseph P. Conlon, Edmund J. Copeland, Edward Hardy +1
When moduli roll in the early universe, all physical scales - including string tensions - simultaneously evolve. The dynamics of cosmic string loops with time-varying tension can p…
Gravitational wave and particle emission from a cosmic string loop: local case
Jorge Baeza-Ballesteros, Edmund J. Copeland, Daniel G. Figueroa +1
Using lattice field simulations of the Abelian-Higgs model, we characterize the simultaneous emission of (scalar and gauge) particles and gravitational waves (GWs) by local string…
Percolating Cosmic String Networks from Kination
Joseph P. Conlon, Edmund J. Copeland, Edward Hardy +1
We describe a new mechanism, whose ingredients are realised in string compactifications, for the formation of cosmic (super)string networks. Oscillating string loops grow when thei…
Formation and decay of oscillons after inflation in the presence of an external coupling, Part-I: Lattice simulations
Mohammed Shafi, Edmund J. Copeland, Rafid Mahbub +2
We investigate the formation and decay of oscillons during the post-inflationary reheating epoch from inflaton oscillations around asymptotically flat potentials in the pres…
Quantum Bosonic String Energy-Momentum Tensor in Minkowski Space-Time
E. J. Copeland, H. J. de Vega, A. Vázquez
The quantum energy-momentum tensor is computed for strings in Minkowski space-time. We compute its expectation value for different physical string states both fo…