214 citations · 420 across the 5 of their papers we have counts for
7 papers · 1 filter
Vacuum Energy, the Cosmological Constant and Compact Extra Dimensions: Constraints from Casimir Effect Experiments
Leandros Perivolaropoulos
We consider a universe with a compact extra dimension and a cosmological constant emerging from a suitable ultraviolet cutoff on the zero point energy of the vacuum. We derive the…
Testing LCDM with the Growth Function δ(a): Current Constraints
S. Nesseris, L. Perivolaropoulos
We have compiled a dataset consisting of 22 datapoints at a redshift range (0.15,3.8) which can be used to constrain the linear perturbation growth rate f=\frac{d\lnδ}{d\ln a}. Fiv…
The Limits of Extended Quintessence
S. Nesseris, L. Perivolaropoulos
We use a low redshift expansion of the cosmological equations of extended (scalar-tensor) quintessence to divide the observable Hubble history parameter space in four sectors: A fo…
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…
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…