38 citations · 83 across the 10 of their papers we have counts for
5 papers · 1 filter
Sourced Scalar Fluctuations in Bouncing Cosmology
Ido Ben-Dayan, Judy Kupferman
We calculate the scalar power spectrum generated by sourced fluctuations due to coupling between the scalar field, which holds most of the energy density of the universe, and a gau…
Comparisons of Black Hole Entropy
Judy Kupferman
In this thesis I examine several different concepts of black hole entropy in order to understand whether they describe the same quantity. I look at statistical and entanglement ent…
Curvature independence of statistical entropy
Judy Kupferman
We examine the statistical number of states, from which statistical entropy can be derived, and we show that it is an explicit function of the metric and thus observer dependent. W…
Divergence on the Horizon
Judy Kupferman
Black hole entropy has been shown by 't Hooft to diverge at the horizon, whereas entanglement entropy in general does not. We show that because the region near the horizon is a the…
Comparison of Variations of Statistical and Wald's Entropies
Merav Hadad, Judy Kupferman
We write the variation of the statistical entropy of matter fields outside a black hole along a Killing vector. This is done for generalized theories of gravity, using a Lie deriva…