Higher order two-mode and multi-mode entanglement in Raman processes

TL;DR

This paper demonstrates the existence of higher order two-mode and multi-mode entanglement in Raman processes using perturbative solutions of quantum equations, revealing how nonclassicality can be manipulated and increased with process order.

Contribution

It introduces a novel application of the Sen-Mandal technique to establish higher order entanglement in Raman processes, including spontaneous cases, and explores control of nonclassicality parameters.

Findings

Higher order entanglement exists in stimulated and spontaneous Raman processes.

Nonclassicality indicators can be enhanced by adjusting coupling constants.

Higher order entanglement signatures increase with process order.

Abstract

The existence of higher order entanglement in the stimulated and spontaneous Raman processes is established using the perturbative solutions of the Heisenberg equations of motion for various field modes that are obtained using the Sen-Mandal technique and a fully quantum mechanical Hamiltonian that describes the stimulated and spontaneous Raman processes. Specifically, the perturbative Sen-Mandal solutions are exploited here to show the signature of the higher order two-mode and multi-mode entanglement. In some special cases, we have also observed higher order entanglement in the partially spontaneous Raman processes. Further, it is shown that the depth of the nonclassicality indicators (parameters) can be manipulated by the specific choice of coupling constants, and it is observed that the depth of nonclassicality parameters increases with the order.