ar X iv : h ep - t h / 96 07 10 8 v 2 2 4 Ju l 1 99 6 Moduli , Scalar Charges , and the First Law of Black Hole Thermodynamics Gary

ar X iv : h ep - t h / 98 10 03 9 v 1 6 O ct 1 99 8 Remarks on Nöther charges and black holes en - tropy

We criticize and generalize some properties of Nöther charges presented in a paper by V. Iyer and R. M. Wald and their application to entropy of black holes. The first law of black holes thermodynamics is proven for any gauge-natural field theory. As an application charged Kerr-Newman solutions are considered. As a further example we consider a (1 + 2) black hole solution. 1

ar X iv : h ep - t h / 06 06 22 8 v 1 2 3 Ju n 20 06 Kaluza - Klein black holes with squashed horizons and d = 4 superposed monopoles

We present new solutions of the d = 5 Einstein-Yang-Mills theory describing black holes with squashed horizons. These configurations are asymptotically locally flat and have a boundary topology of a fibre bundle R × S →֒ S. In a d = 4 picture, they describe black hole solutions with both nonabelian and U(1) magnetic charges.

ar X iv : h ep - t h / 96 10 06 1 v 1 9 O ct 1 99 6 Stimulated emission of particles by 1 + 1 dimensional black holes ∗

The stimulated emission of massless bosons by a relativistic and the CGHS black hole are studied for real and complex scalar fields. The radiations induced by one-particle and thermal states are considered and their thermal properties investigated near the horizon. These exhibit both thermal and non-thermal properties for the two black-hole models.

ar X iv : h ep - t h / 96 07 09 3 v 1 1 2 Ju l 1 99 6 Quantum dynamics of N = 1 , D = 4 supergravity compensator

ar X iv : h ep - t h / 05 07 22 8 v 1 2 3 Ju l 2 00 5 1 Is entanglement entropy proportional to area ?

It is known that the entanglement entropy of a scalar field, found by tracing over its degrees of freedom inside a sphere of radius R, is proportional to the area of the sphere (and not its volume). This suggests that the origin of black hole entropy, also proportional to its horizon area, may lie in the entanglement between the degrees of freedom inside and outside the horizon. We examine this...