We develop and study a model of the Kondo lattice system under the mean field approximation using a HartreeFock procedure as the spin polarization of the system is varied. The goal of this investigation is to provide a realistic model and a starting point for further investigations using more sophisticated techniques, as well as to provide information on mean field solutions calculated on large...

We present a solvable kinetic lattice model which includes microscopic disorder, namely, random exchange energies ~between pairs of spins! fluctuating randomly with time. This, which may ideally model fast ionic diffusion in magnetic systems, impedes reaching equilibrium, in general. The resulting nonequilibrium steady states exhibit additional randomness which induces complex behavior, includi...

Lattice energy calculations using a model potential were performed to model the crystal structures of cis-1,2,3,6- and 3,4,5,6-tetrahydrophthalic (THP) anhydrides. The optimized molecular models using the DFT method at the B3LYP/6-31G** level were found consistent with the available experimental evidence and allowed all differences observed in crystal packing between cis-1,2,3,6- and 3,4,5,6-TH...

A fundamental problem in contemporary string/M theory is to count the number of inequivalent vacua satisfying constraints in a string theory model. This article contains the first rigorous results on the number and distribution of supersymmetric vacua of type IIb string theories compactified on a Calabi-Yau 3-fold X with flux. In particular, complete proofs of the counting formulas in Ashok-Dou...

Computer molecular dynamics simulations of a two-dimensional B = 13 bicrystai, interact@ through a Cennard-Janes potential, have been performed. Grain boundary phase equilibria were studied through the temperature dependence of the bicrystal enthalpy. Two phenomena were studied: a transition to a liquid-like layer at approximately 80% of the bulk melting point, and a reorientation of the grain ...

A review of investigations of running couplings using lattice techniques is given. This includes i) studies of the running of particular non-perturbatively deened renormalized couplings in pure gauge theories over a range of energies, and ii) how estimates of MS (mZ) in lattice QCD are presently obtained.

Strässle, S; Khasanov, R; Kondo, T; Heron, D O G; Kaminski, A; Keller, H; Lee, S L; Takeuchi, T Strässle, S; Khasanov, R; Kondo, T; Heron, D O G; Kaminski, A; Keller, H; Lee, S L; Takeuchi, T (2009). Superfluid density and angular dependence of the energy gap in optimally doped (BiPb)2(SrLa)2CuO6+ δ. Journal of Superconductivity and Novel Magnetism, 22(2):189-193. Postprint available at: http:/...

Determinations of Re/μ are based on observing final states with positrons emerging from a stopped π beam. Decays π → eν(γ) result in positrons appearing with the pion lifetime (26 ns) and with an energy distribution peaking at Ee+ = mπc/2. Decays π → μν(γ) result in positrons too, through the subsequent decay μ → eνν. The latter process leads to a time distribution first rising with the pion li...

We consider charmonium polarization at high-energy hadron collider Tevatron in the framework of the nonrelativistic QCD (NRQCD) and the kT -factorization approach. The polarization effects are studied for the direct and the prompt production channels. The obtained predictions can be used for test of the Regge limit of QCD and for test of the NRQCD formalism. High-energy factorization In the phe...

We explore further the idea that the lattice QCD data for hadron properties in the region mπ > 0.2GeV 2 can be described by the constituent quark model. This leads to a natural explanation of the fact that nucleon excited states are generally stable for pion masses greater than their physical excitation energies. Finally we apply these same ideas to the problem of how pentaquarks might behave i...