Undetermined terminal-based accelerated joint quantum remote state preparation method

Patent metadata

Field	Value
Publication number	US-12184340-B2
Application number	US-202117801076-A
Country	US
Kind code	B2
Filing date	Dec 16, 2021
Priority date	Mar 5, 2021
Publication date	Dec 31, 2024
Grant date	Dec 31, 2024

Abstract

The invention provides an undetermined terminal-based accelerated joint quantum remote state preparation method, including: determining chain channels between at least two sending terminals and a receiving terminal edge node, and determining GHZ channels between the receiving terminal edge node and a plurality of candidate receiving terminals; jointly preparing, by the at least two sending terminals together, to-be-transferred information for the receiving terminal edge node; and sending, by the receiving terminal edge node, the to-be-transferred information to the plurality of candidate receiving terminals, after a target receiving terminal is determined, performing, by the other candidate receiving terminals, a measurement operation, and performing, by the target receiving terminal, corresponding unitary transformation to recover the to-be-transferred information. Information transfer efficiency and information security are greatly improved, thereby resolving a current problem that a terminal lacks a scheme of remotely preparing a quantum state in a case that a receiving terminal is indefinite.

First claim

What is claimed is:

1. An undetermined terminal-based accelerated joint quantum remote state preparation method implemented by a system, wherein the system comprises at least two sending terminals, a receiving terminal edge node, and a plurality of candidate receiving terminals, and the method comprises:
determining chain channels between the at least two sending terminals and the receiving terminal edge node, and determining GHZ channels between the receiving terminal edge node and the plurality of candidate receiving terminals;
jointly preparing, by the at least two sending terminals together, to-be-transferred information for the receiving terminal edge node, wherein the to-be-transferred information is shared together by the at least two sending terminals, and receiving, by the receiving terminal edge node, the to-be-transferred information; and
sending, by the receiving terminal edge node, the to-be-transferred information to the plurality of candidate receiving terminals, determining a target receiving terminal in the plurality of candidate receiving terminals, performing, by the other candidate receiving terminals, a measurement operation, and performing, by the target receiving terminal, corresponding unitary transformation to recover the to-be-transferred information,
wherein the jointly preparing, by the at least two sending terminals together, to-be-transferred information for the receiving terminal edge node, wherein the to-be-transferred information is shared together by the at least two sending terminals, comprises:
introducing an auxiliary particle into one of the sending terminals, performing a CNOT operation on particles (1, b), and sending the auxiliary particle to the other sending terminal; and
separately selecting, by the at least two sending terminals, corresponding amplitude measurement bases and phase measurement bases according to a part of the to-be-transferred information shared by the at least two sending terminals, and jointly preparing the to-be-transferred information for the receiving terminal edge node together.

2. The undetermined terminal-based accelerated joint quantum remote state preparation method implemented by a system according to claim 1 , wherein the determining chain channels between the at least two sending terminals and the receiving terminal edge node comprises:
connecting the at least two sending terminals and the receiving terminal edge node by Bell channels, and determining quantum entangled channels between the at least two sending terminals and the receiving terminal edge node by using an intermediate node measurement operation.

3. The undetermined terminal-based accelerated joint quantum remote state preparation method implemented by a system according to claim 1 , wherein the determining GHZ channels between the receiving terminal edge node and the plurality of candidate receiving terminals comprises:
converting Bell channels between the receiving terminal edge node and the plurality of candidate receiving terminals into multi-particle state GHZ channels between the receiving terminal edge node and the plurality of candidate receiving terminals.

4. The undetermined terminal-based accelerated joint quantum remote state preparation method implemented by a system according to claim 1 , wherein the separately selecting, by the at least two sending terminals, corresponding amplitude measurement bases and phase measurement bases according to a part of the to-be-transferred information shared by the at least two sending terminals, and jointly preparing the to-be-transferred information for the receiving terminal edge node together comprises:
selecting, by one of the sending terminals, an amplitude measurement basis {|P m ; mε{0,1}} and (|P 0 =a 0 |0 +a 1 |1 , |P 1 =a 1 |0 −a 0 |1 ) according to a part of the to-be-transferred information shared by the sending terminal, and selecting, by the other sending terminal, a phase measurement basis {|O n (m) ; m, nε{0, 1}} in the form of

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according to a part of the to-be-transferred information shared by the sending terminal, wherein

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Assignees

• Univ Soochow

Inventors

• Jiang Min
• Li Zongyi
• Li Qing
• Li Taichao
• Sun Bin
• Wang Ao
• Miao Tianyu

Classifications

• Y02D30/70

  in wireless communication networks · CPC title

• H04B10/70 Primary

  Photonic quantum communication · CPC title