We review results of articles hep-th/0607056, hep-th/0610163 and 0704.1405 [hep-th]. Here we focus on establish the connection between the entropy functional formalism of Sen and the standard Euclidean formalism taken at zero temperature. We find that Sen’s entropy function f (on-shell) matches the zero temperature limit of the Euclidean action. Moreover, Sen’s near horizon angular and electric...

We study the zero-temperature behavior of the infinite-ranged Ising spin glass in a transverse field. Using spin summation techniques and Monte Carlo methods we characterize the zero-temperature quantum transition. Our results are well compatible with a value ν = 1 4 for the correlation length exponent, z = 4 for the dynamical exponent and an algebraic decay t−1 for the imaginary-time correlati...