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Multi-hop teleportation method for four-particle cluster states based on non-maximally entangled cluster states

A teleportation, four-particle technology, applied in the field of communication network and information dissemination

Active Publication Date: 2020-07-14
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0031] The technical problem to be solved by the present invention is to provide a four-particle cluster state multi-hop teleportation method based on a non-maximally entangled cluster state to solve the problem of long-distance remote quantum communication

Method used

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  • Multi-hop teleportation method for four-particle cluster states based on non-maximally entangled cluster states
  • Multi-hop teleportation method for four-particle cluster states based on non-maximally entangled cluster states
  • Multi-hop teleportation method for four-particle cluster states based on non-maximally entangled cluster states

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Embodiment 1

[0108] Embodiment 1: A four-particle cluster state single-hop teleportation method based on a non-maximally entangled cluster state

[0109] Step 1: The communication parties are the source node Alice and the target node Bob. Particles 1, 2, 3, and 4 carry unknown four-bit cluster states, which are initially held by Alice. Alice wants to send the unknown four-bit cluster state to the target node Bob. The central server selects an appropriate path and establishes Alice and Bob quantum entanglement channels. On the transmission path, the source node Alice and the destination node Bob share a four-bit non-maximally entangled cluster state in the following form:

[0110]

[0111] The coefficients a, b, c, d are real numbers and satisfy the normalization condition a 2 +b 2 +c 2 +d 2 =1 and a≤b≤c≤d. where Alice owns the particle Bob owns the particle

[0112] Step 2: Modulation and measurement. The source node Alice first performs the CNOT operation on the particle pai...

Embodiment 2

[0137] Embodiment 2: A four-particle cluster state multi-hop teleportation method based on a non-maximally entangled cluster state, using an intermediate node as an example to realize two-way communication. Specific steps:

[0138] Step 1: The communication parties are the source node Alice and the target node Bob. Particles 1, 2, 3, and 4 carry unknown four-bit cluster states, which are initially held by Alice. Alice wants to send the unknown four-bit cluster state to the target node Bob. The central server selects an appropriate path and determines the number of intermediate nodes on the path, and establishes Alice, Bob and the intermediate node L 1 Quantum entanglement channels. On the transmission path, Alice, Bob and the intermediate node L 1 They are connected to each other two by two, and share a four-bit non-maximally entangled cluster state with each other, in the following form:

[0139]

[0140] coefficient is a real number and satisfies the normalization c...

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Abstract

The invention discloses a four-particle cluster state multi-hop stealth transfer method based on a non-maximum entanglement cluster state. A source node Alice and a target node Bob realize long-distance quantum communication between Alice and Bob through the help of an intermediate node. The method mainly comprises four steps that (1) a source node Alice, a target node Bob and an intermediate nodeshare a non-maximum entanglement cluster state, and a quantum entanglement channel is established; (2) Alice and an intermediate node carry out CZ operation on particle pairs in hands of the Alice and the intermediate node, and modulate a channel; (3) the Alice and the intermediate node perform Bell measurement on the particle pairs in their hands and inform the measurement result, and the Aliceestablishes a direct quantum channel with the Bob through unitary operation; and (4) the Alice performs Bell-based measurement on the particle pairs in the hand, and Bob performs a series of unitary operations according to the measurement result of the Alice to obtain a transmitted unknown quantum state. The information transmission efficiency is high, the long-distance remote quantum communication problem can be solved through the help of the intermediate nodes, and the requirement for constructing a complex quantum communication network can be met.

Description

technical field [0001] The invention relates to the field of communication networks and information dissemination methods, in particular to a four-particle cluster state multi-hop teleportation method based on a non-maximally entangled cluster state. Background technique [0002] With the development of society and the advancement of science and technology, information technology has made unprecedented breakthroughs. Information, matter and energy have become the basic elements of the existence and development of today's society. Information theory and quantum theory are two important discoveries in the 20th century. With the deepening of research, in the last two decades of the last century, they began to intersect and merge, and then produced quantum information based on quantum mechanics. . Quantum informatics is an emerging cutting-edge science that studies information processing based on quantum mechanics as the principle of state superposition, including quantum crypt...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/70
CPCH04B10/70
Inventor 曹凌云姜敏李青夏志新
Owner SUZHOU UNIV
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