In this monograph the recursion method is presented as a method for the analysis of
dynamical properties of quantum and classical many-body systems in thermal equilibrium …

In this paper we show how an infinite system of coupled Toda-type nonlinear differential
equations derived by one of us can be used efficiently to calculate the time-dependent pair …

We review various theoretical methods that have been used in recent years to calculate
dynamical correlation functions of many-body systems. Time-dependent correlation …

Dynamic spin correlation functions< S ix (t) S jx> for the one-dimensional S= 1/2 XX model
H=-Jtsum i {S ix S i+ 1 x+ S iy S i}+ 1 y are calculated exactly for finite open chains with up to …

We consider a spin-1 2 XY chain in a transverse (z) field with multisite interactions. The
additional terms introduced into the Hamiltonian involve products of spin components …

Out-of-equilibrium behavior is explored in the one-dimensional anisotropic XY model.
Initially preparing the system in the isotropic XX model with a linearly varying magnetic field …

Allosterism traditionally refers to local changes in an extended object, for instance the
binding of a ligand to a macromolecule, leading to a localized response at some other …

The effects of the Dzyaloshinski—Moriya (DM) interaction on the ground-state properties of
the anisotropic XY chain in a transverse field have been studied by means of correlation …

We investigate the effects of disorder on the dynamics of the s= 1/2 XY model in one
dimension. The energy couplings are randomly drawn independently from a bimodal …

The effects of Gaussian disorder on the dynamics of the one-dimensional spin-1/2 random
transverse Ising model are studied in the high-temperature limit by the recursion method …