Results 21 to 30 of about 152,050 (110)

Confinement and Condensates Without Fine Tuning in Supergravity Duals of Gauge Theories [PDF]

open access: yes, 1999
We discuss a solution of the equations of motion of five-dimensional gauged type IIB supergravity that describes confining SU(N) gauge theories at large N and large 't Hooft parameter.
Girardello, L.   +3 more
core   +2 more sources

Spin glasses without time-reversal symmetry and the absence of a genuine structural glass transition

open access: yes, 2000
We study the three-spin model and the Ising spin glass in a field using Migdal-Kadanoff approximation. The flows of the couplings and fields indicate no phase transition, but they show even for the three-spin model a slow crossover to the asymptotic high-
B.W. Southern   +28 more
core   +1 more source

The initial singularity in solutions of the Einstein-Vlasov system of Bianchi type I [PDF]

open access: yes, 1995
The dynamics of solutions of the Einstein-Vlasov system with Bianchi I symmetry is discussed in the case of massive or massless particles. It is shown that in the case of massive particles the solutions are asymptotic to isotropic dust solutions at late ...
Alan D. Rendall, Lukash V. N.
core   +3 more sources

Honeycomb lattice polygons and walks as a test of series analysis techniques

open access: yes, 2005
We have calculated long series expansions for self-avoiding walks and polygons on the honeycomb lattice, including series for metric properties such as mean-squared radius of gyration as well as series for moments of the area-distribution for polygons ...
Caracciolo S   +18 more
core   +1 more source

The role of initial conditions in the ageing of the long-range spherical model

open access: yes, 2008
The kinetics of the long-range spherical model evolving from various initial states is studied. In particular, the large-time auto-correlation and -response functions are obtained, for classes of long-range correlated initial states, and for magnetized ...
Annibale A   +10 more
core   +1 more source

Canonical Trees, Compact Prefix-free Codes and Sums of Unit Fractions: A Probabilistic Analysis [PDF]

open access: yes, 2015
For fixed $t\ge 2$, we consider the class of representations of $1$ as sum of unit fractions whose denominators are powers of $t$ or equivalently the class of canonical compact $t$-ary Huffman codes or equivalently rooted $t$-ary plane "canonical" trees.
Heuberger, Clemens   +2 more
core   +2 more sources

Transport and fluctuation-dissipation relations in asymptotic and pre-asymptotic diffusion across channels with variable section

open access: yes, 2014
We study the asymptotic and pre-asymptotic diffusive properties of Brownian particles in channels whose section varies periodically in space. The effective diffusion coefficient $D_{\mathrm{eff}}$ is numerically determined by the asymptotic behavior of ...
Cecconi, Fabio   +2 more
core   +1 more source

Path Integral Monte Carlo Approach to the U(1) Lattice Gauge Theory in (2+1) Dimensions [PDF]

open access: yes, 2002
Path Integral Monte Carlo simulations have been performed for U(1) lattice gauge theory in (2+1) dimensions on anisotropic lattices. We extractthe static quark potential, the string tension and the low-lying "glueball" spectrum.The Euclidean string ...
A. Dabringhaus   +56 more
core   +2 more sources

Quenched dynamics of classical isolated systems: the spherical spin model with two-body random interactions or the Neumann integrable model

open access: yes, 2017
We study the Hamiltonian dynamics of the spherical spin model with fully-connected two-body interactions drawn from a Gaussian probability distribution.
Cugliandolo, Leticia F.   +4 more
core   +1 more source

A comment on generalized Schwinger effect

open access: yes, 2018
A spatially homogeneous, time-dependent, electric field can produce charged particle pairs from the vacuum. When the electric field is constant, the mean number of pairs which are produced depends on the electric field and the coupling constant in a non ...
Chakraborty, Sumanta   +2 more
core   +1 more source

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