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Method for remotely forming two-atom entangled state based on cavity quantum electrodynamics technology

An electrodynamic and remote preparation technology, applied in the direction of photon quantum communication, etc.

Inactive Publication Date: 2016-04-13
SHANGHAI DIANJI UNIV
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Problems solved by technology

In addition, although there are a few experimental schemes for remote state preparation based on atomic entanglement states, most of them are limited to one sender and one receiver. At present, quantum communication is developing towards the direction of networking, and the communication protocol requires Considering that there are multiple participants

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  • Method for remotely forming two-atom entangled state based on cavity quantum electrodynamics technology
  • Method for remotely forming two-atom entangled state based on cavity quantum electrodynamics technology
  • Method for remotely forming two-atom entangled state based on cavity quantum electrodynamics technology

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Embodiment Construction

[0043] 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.

[0044] The present invention is based on the following ideas:

[0045] (1) A sender can choose any one of the two recipients to transmit the quantum state to be transmitted;

[0046] (2) Any one of the two recipients needs the assistance of the other recipient to reconstruct the transmitted quantum state, so the other recipient can be regarded as the controller;

[0047] (3) One of the channels for quantum information transmission is a W-type entanglement between three atoms, which makes the quantum channel well resistant to environmental noise;

[0048] (4) The state of the atom represents information. Using the interaction between the two-level atoms and the cavity field, the manipulation of the atomic state can be realized, that is, the pro...

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Abstract

The invention provides a method for remotely forming a two-atom entangled state based on a cavity quantum electrodynamics technology. A sender assists one of two receivers in establishing the two-atom entangled state represented by |phi>=alpha|gg>+beta|ee>, wherein |g> and |e> represent a ground state and an excitation state of a two-level atom respectively, the parameter alpha and the parameter beta are real numbers, and a condition represented by alpha<2>+beta<2>=1 is satisfied. The sender grasps information about a quantum state, and the two receivers do not know the information about the quantum state. Targeted at a task of transmitting information, the sender establishes a two-atom entangled state and a three-atom W type entangled state as quantum channels between the sender and the two receivers.

Description

technical field [0001] The present invention relates to the technical fields of quantum information, communication network, and novel optical communication. More specifically, the present invention relates to a method for remotely preparing two-atom entangled states based on cavity quantum electrodynamics technology. 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. At present, various interesting quantum communication schemes have been proposed, such as quantum teleportation, quantum secret key distribution, remote state preparation, quantum secret sharing, etc. These communication schemes ...

Claims

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Application Information

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IPC IPC(8): H04B10/70
CPCH04B10/70
Inventor 任远肖骁琦
Owner SHANGHAI DIANJI UNIV
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