214 citations · 420 across the 5 of their papers we have counts for
5 papers · 1 filter
Cosmic Acceleration Data and Bulk-Brane Energy Exchange
C. Bogdanos, S. Nesseris, L. Perivolaropoulos +1
We consider a braneworld model with bulk-brane energy exchange. This allows for crossing of the w=-1 phantom divide line without introducing phantom energy with quantum instabiliti…
Superconducting Semilocal Stringy (Hopf) Textures
L. Perivolaropoulos
The dynamics of texture-like configurations are briefly reviewed. Emphasis is given to configurations in 2+1 dimensions which are constructed numerically. Confirming previous semi-…
Core Phase Transitions for Embedded Topological Defects
M. Axenides, L. Perivolaropoulos
Vortices in superfluid 3He-B have been observed to undergo a core transition. We discuss the analog phenomenon in relativistic field theories which admit embedded global domain wal…
Domain Walls and Vortices with Non-Symmetric Core
Minos Axenides, Leandros Perivolaropoulos
We review recent work on a new class of topological defects which possess a nonsymmetric core. They arise in scalar field theories with global symmetries, U(1) for domain walls and…
On the Stability of Electroweak Strings (New Version)
M. James, L. Perivolaropoulos, T. Vachaspati
We map the parameter space that leads to stable Z-vortices in the electroweak model. For , we find that the strings are unstable for a Higgs mass larger than 24 G…