Quantum networks generation based on four-wave mixing

摘要

We present a scheme to realize versatile quantum networks by cascadingseveral four-wave mixing (FWM) processes in warm rubidium vapors. FWM is anefficient $\chi^{(3)}$ nonlinear process, already used as a resource formultimode quantum state generation and which has been proved to be a promisingcandidate for applications to quantum information processing. We analyzetheoretically the multimode output of cascaded FWM systems, derive itsindependent squeezed modes and show how, with phase controlled homodynedetection and digital post-processing, they can be turned into a versatilesource of continuous variable cluster states.