Quantifying nonclassicality of multimode bosonic fields via skew information

We quantify the nonclassicality of multimode bosonic field states by adopting an information-theoretic approach involving the Wigner-Yanase skew information. The fundamental properties of the quantifier such as convexity, superadditivity, monotonicity, and conservation relations are revealed. The quantifier is illustrated by a variety of typical examples, and applications to the quantification of nonclassical correlations are discussed. Various extensions are indicated.

Automated summary

The article introduces a method to quantify the nonclassicality of multimode bosonic field states using an information-theoretic approach, and illustrates the fundamental properties and some applications of this quantifier. Various extensions are also mentioned for further exploration.