Decomposition of Total Angular Coherence Momentum in Vectorial Coherence Theory of Electromagnetic Fields.

In analogy to classical angular momentum in electrodynamics, we introduce a new concept of spin and orbital coherence momenta into the general coherence theory of vector electromagnetic fields. On the basis of the decomposition of the total angular coherence momentum into the sum of two terms, some properties related to the newly introduced spin and orbital coherence momenta are also investigated for the first time. [ABSTRACT FROM AUTHOR]