Opto-electronic hybrid system realizing quantum coherence

Abstract

The invention provides an opto-electronic hybrid system realizing quantum coherence. The system comprises a fixed cavity mirror, a movable cavity mirror and a charge body; an optical cavity provided with cold atom cloud is formed between the fixed cavity mirror and the movable cavity mirror, and the movable cavity mirror is filled with charge; probe light is injected into the optical cavity; the charge body forms capacitive coupling with the movable cavity mirror; a current generator is electrically connected with the charge body so as to inject charge. Quantity of injected charge is regulated so as to control coulomb force between the charge body and the charge on the movable cavity mirror, then the movable cavity mirror is controlled to move relative to the fixed cavity mirror, and intensity of a cavity field generated in the optical cavity due to external action is changed, as a consequence, a quantized cavity field serving a control field is changed, then interaction between the probe light and atoms in the atom cloud is regulated coherently according to the change of the cavity field intensity, and storage / retrieval of information included in the probe light in the cold atoms or on / off of a probe light transmission path is realized. The system has the advantage of high integration of electronic control, has a cavity quality regulation function and realizes quantum memory by cavity induced transparency.

Description

technical field [0001] The invention relates to the technical field of quantum communication, in particular to an optoelectronic hybrid system for realizing quantum coherence. Background technique [0002] In the current era of ever-increasing global information exchange, there is an increasing demand for secure and fast communication technologies, such as optical quantum communication networks. For such a communication network, the biggest challenge at present is the distance and the integration of modules. As the most likely future information carrier, photons are favored by scientists. However, due to the interaction between photons and the external environment, quantum decoherence is relatively large and difficult to apply. Such a quantum repeater based on quantum storage has become a key technology to overcome long distances. Quantum storage plays a central role in the field of quantum information such as quantum computing, quantum communication, and quantum network. ...

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Problems solved by technology

[0007] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide a photoelectric hybrid system that realizes quantum coherence, and realizes the regulation of the quantized light field in the cavity through electrically controlled sensitive mechanical movement, and solves the problems in the prior art. Difficulties in integrating quantum memory modules, and problems that cannot meet the requirements of sensitivity and precision

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