8 papers
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-…
Hints of Cosmic String Induced Discontinuities in the COBE Data?
L. Perivolaropoulos, N. Simatos
We apply new statistical tests on the four year 53 GHz DMR data and show that there is significant probability for the existence of coherent temperature discontinuities hidden in t…
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…
A New Statistic for the Detection of Long Strings in Microwave Background Maps
Leandros Perivolaropoulos
A new statistic is briefly reviewed, designed to detect isolated coherent step-like discontinuities produced by cosmic strings present at late times. As a background I superpose a…
A Statistic for the Detection of Long Strings in Microwave Background Maps
Leandros Perivolaropoulos
Using analytical methods and Monte Carlo simulations, we analyze a new statistic designed to detect isolated step-like discontinuities which are coherent over large areas of Cosmic…