Generating device for entanglement of continuous variable atom ensemble

Abstract

The invention relates to a generating device for entanglement of continuous variable atom ensemble and belongs to the generating device for the entanglement of atom ensemble applied to a quantum information network. The generating device is used for solving the technical problem that probability preparation exists in the present preparation for the entanglement of atom ensemble of variables separation. According to the technical scheme provided by the invention, the generating device for entanglement of continuous variable atom ensemble comprises a light source unit, a plurality of beam coupling systems, two sets of atom ensembles, an entanglement measuring system and a feedback unit. The orthogonal component of a light field in the continuous variable quantum information and the collective spin wave of the atom ensemble are utilized to generate the entanglement of two sets of stokes light and spin wave of atom ensemble in a spontaneous raman scattering process, and then interference signals of the two beams of stokes light are fed back to a first atom ensemble through the quantum entanglement exchange, the entanglements of the first atom ensemble and the second atom ensemble are certainly prepared, and the generated stokes light is utilized to measure and analyze the entanglement of the atom ensemble.

Description

technical field [0001] The invention relates to a device for generating continuous variable atomic ensemble entanglement, which belongs to a device for generating atomic ensemble entanglement applicable to quantum information networks. Background technique [0002] Quantum entanglement is not only one of the important contents of quantum mechanics, but also an important resource for quantum information transmission and processing. With the development of quantum information network, the quantum information network composed of light and atoms is the key to the development and application. Due to the advantages of fast transmission speed and weak interaction with the surrounding environment, light is applied to the transmission of quantum information. Atoms can efficiently interact with light, serving as nodes for quantum information processing and storage. Atomic ensembles are one of the effective candidates for implementing quantum network nodes. Therefore, the constructi...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the technical problem of probabilistic preparation of the existing entanglement of atomic ensembles of separated var

Images