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Method for remote preparation of quantum state based on multi-party joint operation based on single atom

A remote preparation and atomic operation technology, applied in the direction of photon quantum communication, can solve the problems of easy annihilation and short decoherence time, and achieve good security, overcome the influence of environmental noise, and strong anti-interference effect

Inactive Publication Date: 2017-09-01
SHANGHAI DIANJI UNIV
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Problems solved by technology

Although the photon transmission speed is fast, the decoherence time is short, and it is easy to annihilate in the actual physical environment

Method used

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  • Method for remote preparation of quantum state based on multi-party joint operation based on single atom
  • Method for remote preparation of quantum state based on multi-party joint operation based on single atom
  • Method for remote preparation of quantum state based on multi-party joint operation based on single atom

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Embodiment Construction

[0038] In order to make the content of the present invention clearer and easier to understand, the content of the present invention will be described in detail below with reference to specific embodiments and drawings.

[0039] The method for multi-party joint remote preparation of quantum states based on single-atom operation according to a preferred embodiment of the present invention is based on the interaction between a single two-level atom and a classical electromagnetic field. Among them, (1) multiple senders at different nodes only know part of the secret quantum state information, but not all of the information. Therefore, it is impossible for any sender to disclose the secret information; (2) only when multiple senders Only with the cooperation of the participants can the secret quantum state be re-established in a third party. The absence of either party will lead to the failure of the preparation process, which further guarantees the security of the secret quantum stat...

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Abstract

A multi-party joint remote preparation method for quantum states based on single-atom operations, in which two senders remotely assist a receiver to restore a secret single-atom qubit state: |Φ>=α|g>+β|e>; Where |g>l|e>indicates the ground state and excited state of two-level atoms respectively, the parameters α and β are real numbers, and the condition α2+β2=1 is satisfied; and the parameters α and β describe all the information of the secret qubit, All the information of the secret qubit is split into two parts, which are owned by the two senders respectively. The information owned by the first sender is {α1, β1}, and the information owned by the second sender is {α2, β2}; the two senders and one receiver share a two-level atom consisting of three In the W-type quantum entanglement state, the first atom belongs to the first sender, the second atom belongs to the second sender, and the third atom belongs to the receiver.

Description

Technical field [0001] The present invention relates to the field of quantum information and communication networks. More specifically, the present invention relates to a method for multi-party joint remote preparation of quantum states based on single-atom operations. Background technique [0002] Quantum communication is a new communication method that has emerged in recent years. By encoding information in a physical system with quantum characteristics, using the quantum characteristics of the system state, such as quantum entanglement, measurement collapse, and non-cloning of quantum states, the quantum communication process is safer, more efficient, and anti-interference than classical communication. With the deepening of quantum communication network research, people have successively proposed various quantum communication methods to solve communication problems such as information transmission, information encryption, secret key distribution, and secret sharing. [0003] Su...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/70
Inventor 肖骁琦
Owner SHANGHAI DIANJI UNIV
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