Similarly, field momentum density
is the product of inertia density and velocity.
Positron annihilation spectroscopy and X-ray Compton scattering can be used to measure electron momentum density
To our best knowledge, however, the research in the orbital angular momentum density
of the elegant Laguerre-Gaussian beam has not been reported so far.
Among the topics are probability concepts in physics as the path to statistical mechanics, atoms in molecules, density-functional approximations for exchange and correlation, electron density and molecular similarity, probing electron dynamics with the Laplacian of the momentum density
, and applications of modern density functional theory to surfaces and interfaces.
Field quantities such as mass density, momentum density
, angular momentum density
, and energy density are defined on the mesoscopic space.
From the aforementioned E-L equations the configurational material stress and the configurational material momentum density
can be derived .
Reconstruction of Momentum Density
Distribution from 2D ACAR Data via Maximum Entropy
The linear momentum density
is given by the Poynting vector E x B and the angular momentum is the cross product of the Poynting vector with the position vector.
This is made in terms of the electromagnetic momentum density
can be interpreted as a local electromagnetic momentum density
of the radiation field, with [?
can be interpreted as an electromagnetic momentum density
with S denoting the Poynting vector, and
projections of the energy-momentum tensor of time density fields, which are physically observable characteristics of such fields--the energy density q (69), the momentum density