A device for generating deterministic entanglement of continuous variable three-atom ensemble

Abstract

The invention relates to a continuous variable three-atom ensemble deterministic entanglement generating device, belonging to the technical field of atomic ensemble deterministic entanglement generating devices; the technical problem to be solved is to provide a continuous variable three-atom system with good reliability and easy realization. The improvement of the structure of the ensemble deterministic entanglement generating device; the technical solution adopted to solve the technical problem is: the light source unit is respectively connected with the first, second, and fourth input ends of the first, second, and third atomic ensembles, and the feedback system. The fourth, fifth, and sixth input terminals are connected to the fourth input terminal of the measurement system, and the first and second output terminals of the first, second, and third atomic ensembles are connected to the beam splitter network and the input terminal of the measurement system. , the output end of the beam splitter network is connected with the first, second and third input ends of the feedback system, and the first, second and third output ends of the feedback system are connected with the first, second and third atomic ensemble The third input end is connected; the invention can be widely used in the field of quantum information.

Description

technical field [0001] The invention relates to a continuous variable three-atom ensemble deterministic entanglement generating device, which belongs to the technical field of atomic ensemble deterministic entanglement generating devices. Background technique [0002] Quantum entanglement is the core concept of quantum mechanics and the basic resource for the realization of quantum information technology. The entanglement of discrete-variable and continuous-variable optical fields has been successfully achieved and is widely used in various quantum information schemes, such as quantum communication, quantum storage, and quantum computing. With the rapid development of quantum information technology, the networking of quantum information has become an inevitable development trend. The establishment of a quantum information network requires the establishment of entanglement between multiple quantum nodes. The optical field is an ideal carrier for quantum information transmiss...

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Problems solved by technology

[0004] The above research work has realized the establishment of the entanglement of two atomic ensembles that separate variables, which provides important resources for the development of quantum information science. However, the establishment of atomic ensemble entanglement in the above scheme first needs to generate entanglement between photons, and then use electromagnetic induction Transparent storage establishes the entanglement of the atomic ensemble through the method of quantum state mapping. This scheme is limited by the efficiency of atomic storage, which affects the entanglement degree of the established atomic ensemble, and the entanglement generated by this scheme is predictive entanglement, which is less reliable. , the error correction conditions and entanglement devices are relatively complex, which is not conducive to subsequent expansion applications

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