Non-Hermitian topological systems exhibit a range of unique phenomena that are absent in their Hermitian counterparts.

In this communication, a new method for modulating spin angular momentum (SAM) and orbital angular momentum (OAM) based on anisotropic holographic metasurfaces is proposed, which can realize the co- ...

Blame game erupts over Spanish blackouts as government blasts 'poor planning' after operators said they 'did not need more thermal power plants' By PERKIN AMALARAJ ...

The orbital angular momentum (OAM) technology is able to provide a new degree of freedom for wireless communication systems. The energy of OAM waves is focused within a circle region surrounding the ...

Position and momentum operators 45 4. Eigenfunctions and eigenvalues of the momentum operator 48 5. Quantum description of systems 51 6. Commutativity of operators 52 7. Angular momentum 54 8. The ...

Many useful appendices on general theoretical tools are also included, covering topics such as angular momentum algebra, symmetry problems, statistical description of level densities, and theory of ...

This book describes the generalized Sturmian method, which offers a fresh approach to the calculation of atomic spectra. Generalized Sturmians are isoenergetic solutions to an approximate ...