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Joint remote preparation of quantum states based on triatomic ghz states

A remote preparation and quantum state technology, which is applied in the field of joint remote preparation of quantum states based on the three-atom GHZ state, can solve the problems of easy annihilation and short decoherence time, and achieve good security, convenient operation, and improved communication efficiency.

Inactive Publication Date: 2018-02-09
SHANGHAI DIANJI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Joint remote preparation of quantum states based on triatomic ghz states
  • Joint remote preparation of quantum states based on triatomic ghz states
  • Joint remote preparation of quantum states based on triatomic ghz states

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Embodiment Construction

[0042] 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 in conjunction with specific embodiments and accompanying drawings.

[0043] According to the preferred embodiment of the present invention, the method for joint remote preparation of quantum states based on the three-atom GHZ state is based on the interaction between a single two-level atom and a classical electromagnetic field, with the following settings:

[0044] (1) Multiple senders at different nodes only know part of the information of the secret quantum state, but not all information; therefore, it is impossible for any sender to disclose the secret information;

[0045] (2) Only with the cooperation of multiple senders can the secret quantum state be re-established in a third party. The absence of any party will lead to the failure of the preparation process, further ensuring the security of the secret qua...

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Abstract

The invention provides a method for joint remote quantum state preparation based on a tri-atomic GHZ state. A first sender and a second sender remotely assist a receiver in recovering a secret monatomic quantum bit state |Phi>=Alpha|g>+Beta|e>, wherein |g> and |e> respectively represent the ground state and excited state of a two-lever atom, the parameters Alpha and Beta are real numbers, Alpha<2>+Beta<2>=1, and the parameters Alpha and Beta describe all the information of the secret quantum bit; the parameters Alpha and Beta are split into two parts which are owned by the two senders, the first sender owns the information {Alpha1, Beta1}, and the second sender owns the information {Alpha2, Beta2}; and the first sender, the second sender and the receiver share a GHZ-type quantum entangled state |Psi>=1 / (square root of 2)*(|ggg>+|eee>)1,2,3 composed of three two-lever atoms, wherein the first atom 1 belongs to the first sender, the second atom 2 belongs to the second sender, and the third atom 3 belongs to the receiver.

Description

technical field [0001] The present invention relates to the field of quantum information and communication network, more specifically, the present invention relates to a method for joint remote preparation of quantum state based on triatomic GHZ state. Background technique [0002] Quantum communication is a new type of communication that has emerged in recent years. By encoding information into a physical system with quantum properties, using the quantum properties of the system state, such as quantum entanglement, measurement collapse, and quantum state non-cloning, etc., the quantum communication process is safer, more efficient, and anti-interference than classical communication. With the deepening of research on quantum communication networks, various quantum communication methods have been proposed to solve communication problems such as information transmission, information encryption, key distribution, and secret sharing. [0003] Suppose that after some information...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/70
CPCH04B10/70
Inventor 肖骁琦
Owner SHANGHAI DIANJI UNIV
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