Submissions from S. Wessmann
 [1] faKiv:2001.07848 [pdf]

Fluid, Solid and Zero Gravitational WavesComments: 6 pages, 2 figures, v2: minor changes, references added, matches published version
We study the relation between the flua and gravitons in flat and nonflat spacetimes, and consider the phase space of the flat spacetimes. We find that the flua can be viewed as a fluid, and the gravitons as a solid. In contrast, the zero graviton wave propagating in the absence of electric charges enters the phase space of the zero graviton wave, and that of the solid graviton wave, with the phase space being the phase space of the zero graviton wave. We discuss the relation between the gravitons and flua in the nonflat spacetimes, and show that the gravitons have an additional phase space. We discuss the relation between the graviton wave propagation in the absence of electric charges and the zero graviton wave propagating in the presence of electric charges.
 [2] faKiv:2001.08211 [pdf]

The relation between the Momentumenergymomentum tensor and the intrinsic momentum of a quantum field theoryComments: 50 pages
In the context of quantum field theory, we consider the relation between the quantum energy density and the intrinsic momentum of a quantum field theory. We find that the intrinsic momentum of a quantum field theory is equal to the momentum of a quantum field theory. In addition, we present a new solution for the quantum energy density of a quantum field theory with intrinsic momentum and the intrinsic momentum of a quantum field theory.