Measurement-induced enhancement of entanglement of a two-mode squeezed-vacuum state

摘要

A two-mode squeezed-vacuum state is one of the most important resources in quantum information processing of continuous variables. Measurement-induced enhancement of entanglement of a two-mode squeezed-vacuum state is considered, where, the degenerate Raman interaction between a A-type atom and the field in a high-Q cavity is applied. It is shown that, under certain conditions, the entanglement can be enhanced with finite probability.