In this paper, we define energy-momentum density as a product of the complex vector electromagnetic field and its complex conjugate. We derive an equation for the spacetime derivative of the energy-momentum density. We show that the scalar and vector parts of this equation are the differential conservation laws for energy and momentum, and the imaginary vector part is a relation for the curl of...

We consider a gravitational theory with an additional non-minimal coupling between baryonic matter fields and geometry. The is second order in the energy momentum tensor can be seen as generalization of energy-momentum squared gravity model. will add constraint through Lagrange multiplier to ensure conservation tensor. Background cosmological implications together its dynamical system analysis ...

Though vortices are an unavoidable presence in bulk superfluid helium, they have not been observed to date in helium nanodroplets. The energy and angular momentum of both straight and curved vortex states of a helium nanodroplet are examined as a function of droplet size. For droplets in the size range of many experiments, it is found that during the pickup of heavy solutes, a significant fract...