While these systems strongly challenge the standard concepts and methods of the quantum

many-body theory, a new era is progressively unfolding, in which quantitative and detailed comparisons between theory and experiments is becoming possible in strong correlation regimes, even out of equilibrium.

Fundamentally, one must give a description of the

many-body wavefunction's excited states to give such a correspondence.

MEG in nm-sized hydrogen-passivated silicon nanowires (NWs), and quasi two-dimensional nanofilms depends strongly on the degree of the core structural disorder as shown by the

many-body perturbation theory (MBPT) calculations based on the DFT simulations.

In the 1992 edition of his book A Guide to Feynman Diagrams in the

Many-Body Problem, physicist Richard Mattuck compares the dilemma to trying to describe a galloping horse and all the grains of dust that it kicks up.

In 1985, he joined the Physics Directorate at Lawrence Livermore National Laboratory, to work on the computational modeling of

many-body atomic systems in high-temperature plasmas.

Roger Melko also holds a Canada Research Chair in Computational Quantum

Many-Body Physics.

The topics include some global aspects of linear wave equations, the theory of nonlinear Schrodinger equations, the singular formation for the nonlinear Schrodinger equation, geometry and analysis in

many-body scattering, and the derivation of effective evolution equations from microscopic quantum dynamics.

In 2008 the National Science Foundation awarded him a grant to study quantum dynamics of AMO systems and non-Markovian quantum trajectories for

many-body systems, and in 2009 the Defense Advanced Research Projects Agency (DARPA) awarded him a grant to study the entanglement dynamics of qubit systems.

They also used a new computational method that uses only fundamental physics to model the complex

many-body interactions among electrons.

He considers intermolecular forces, the resonant transfer of energy, retarded dispersion forces,

many-body forces, and intermolecular interactions in a radiation field.

Beside implying a low Poisson ratio, the very high G/B ratio holds implications for several other crystal-bonding properties: covalency, Cauchy-relation departure,

many-body forces, and others.

Moser, Rational and elliptic solutions of the Korteweg-de Vries equation and a related

many-body problem, Comm.