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20 papers · 1 filter
Quantizing Regge calculus
Giorgio Immirzi
A discretized version of canonical gravity in (3+1)-d introduced in a previous paper is further developed, introducing the Liouville form and the Poisson brackets, and studying the…
Charge Screening in the Finite Temperature Schwinger Model
G. Grignani, G. Semenoff, P. Sodano +1
We compute the effective action and correlators of the Polyakov loop operator in the Schwinger model at finite temperature and discuss the realization of the discrete symmetries th…
Charge Screening and Confinement in Hot 3-D QED
G. Grignani, G. Semenoff, P. Sodano +1
We examine the possibility of a confinement-deconfinement phase transition at finite temperature in both parity invariant and topologically massive three-dimensional quantum electr…
Gauge Theories of Josephson Junction Arrays
M. C. Diamantini, P. Sodano, C. A. Trugenberger
We show that the zero-temperature physics of planar Josephson junction arrays in the self-dual approximation is governed by an Abelian gauge theory with periodic mixed Chern-Simons…
Azimuthal Correlations in Photon-Photon Collisions
N. Arteaga, C. Carimalo, P. Kessler +2
Using the general helicity formula for collisions, we are showing that it should be possible to determine a number of independent ``structure functions'', i.e. linear com…
The Cluster Distribution as a Test of Dark Matter Models. III. the Cluster Velocity Field
Lauro Moscardini, Enzo Branchini, Paolo Tini Brunozzi +3
We study the large-scale velocity fields traced by galaxy clusters in numerical simulations of a box of side 960 Mpc, and compare them with available data on real clusters…