Minkowski Energy-Momentum Tensor in the Nonlinear Optics of Media with a Nonlocal Optical Response

摘要

We have derived analytic expressions for the energy density, the momentum density, and the energy and momentum flux densities of electromagnetic field in a nonabsorbing nonlinear medium with an arbitrary symmetry and with a nonlocal optical response from the Maxwell equations written for the strengths and inductions of the electric and magnetic fields, as well as relations for the intrinsic symmetry of the tensors describing the local and nonlocal responses of such a medium. The resulting expressions form a unified energy-momentum tensor corresponding to the Minkowski energy-momentum tensor.