CN106899407A - A kind of method for designing of remote quantum communication network - Google Patents
A kind of method for designing of remote quantum communication network Download PDFInfo
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- CN106899407A CN106899407A CN201710242724.0A CN201710242724A CN106899407A CN 106899407 A CN106899407 A CN 106899407A CN 201710242724 A CN201710242724 A CN 201710242724A CN 106899407 A CN106899407 A CN 106899407A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
- H04L9/08—Key distribution or management, e.g. generation, sharing or updating, of cryptographic keys or passwords
- H04L9/0816—Key establishment, i.e. cryptographic processes or cryptographic protocols whereby a shared secret becomes available to two or more parties, for subsequent use
- H04L9/0852—Quantum cryptography
- H04L9/0855—Quantum cryptography involving additional nodes, e.g. quantum relays, repeaters, intermediate nodes or remote nodes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
- H04L9/08—Key distribution or management, e.g. generation, sharing or updating, of cryptographic keys or passwords
- H04L9/0816—Key establishment, i.e. cryptographic processes or cryptographic protocols whereby a shared secret becomes available to two or more parties, for subsequent use
- H04L9/0819—Key transport or distribution, i.e. key establishment techniques where one party creates or otherwise obtains a secret value, and securely transfers it to the other(s)
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- Engineering & Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- Computer Networks & Wireless Communication (AREA)
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- Theoretical Computer Science (AREA)
- Optical Communication System (AREA)
Abstract
The present invention discloses a kind of method for designing of remote quantum communication network, comprises the following steps：Quantum key distribution layer is set up, quantum network is constituted；Between quantum nodes quantum path is set up in quantum key distribution layer；Classical communication is combined with quantum key distribution layer；Transmitting terminal and intermediate node do corresponding Bell bases measurement；The classical information of acquisition is transmitted directly to receiving terminal by transmitting terminal and intermediate node；Receiving terminal carries out unitary transformation and reverts to initial quantum information.Invention can be good at realizing any remote quantum network that transmission of quantum information, without auxiliary particle, has the advantages that simple to operation, time delay is few, cost-effective, expansible so that the application of quantum communication network is more extensive.
Description
Technical field
The invention belongs to quantum communication network technology, and in particular to a kind of method for designing of remote quantum communication network.
Background technology
Quantum communications are the recent studies on fields that quantum mechanics is combined with information science, are proved to be the logical of unconditional security
Letter technology.Quantum communication network both can transmit quantum information as an independent communication network, it is also possible to used as safety
Link or key support system are applied in existing classical communication system.Under the guarantee of information security, information transfer when
The economies of effect property and resources costs directly influence the selection of user.In order to improve the transmission speed of quantum information and save net
The cost of network, classical channel is directly transmitted to user using parallel setting, all measurement results by classical channel；Quantum path by
EPR Entangled States are constituted.
Current quantum communications are typically with the communication of " point-to-point " formula, and quantum state is passed through into a quantum channel or multiple
The quantum channel for tangling particle combinations is sent to receiving terminal, because quantum channel has eliminating coherence phenomenon, short-range letter
Breath transmission can not meet the Modern Live demand of fast development, although it has been proposed that the scheme of decoherence, this can not
Fundamentally solve the problems, such as telecommunication, and this scheme allows the transmitting procedure to become more complicated；Also some propose to set
Multiple nodes are put to increase transmission range, but quantum link does not use optimal EPR Entangled States.
Under comparing, EPR Entangled States need resource minimum, and parallel classical channel greatlys save transmission time, connects
Receiving end does not need any auxiliary particle can just to revert to initial quantum state.It is small that EPR Entangled States prepare simple, memory space.Through
Allusion quotation channel parallel sets, such that transmission is convenient, time-consuming, and this will cause that the application of quantum communication network is wider.
The content of the invention
Goal of the invention：It is an object of the invention to solve the deficiencies in the prior art, there is provided a kind of remote quantum
The method for designing of communication network.
Technical scheme：A kind of method for designing of remote quantum communication network of the present invention, comprises the following steps：
(1) quantum key distribution layer is set up, quantum network is constituted；
(2) quantum path is set up in quantum key distribution layer between quantum nodes, quantum path is made up of Entangled State；
(3) classical communication is combined with quantum key distribution layer：Classical channel and quantum key distribution layer are respectively at
Uplink and downlink link, quantum nodes and through code node correspond；
(4) transmitting terminal and intermediate node do corresponding Bell bases measurement：The intermediate node refers to the amount in quantum link
The measurement of Bell bases is done at child node, transmitting terminal and each oneself node of leisure of intermediate node, is not interfere with each other；
(5) classical information of acquisition is transmitted directly to receiving terminal by transmitting terminal and intermediate node；The classical information refers to
, by classical transmission to receiving terminal, classical channel is using parallel biography for the Bell base junctions fruit that transmitting terminal and intermediate node will be measured
Defeated transmission means；
(6) receiving terminal carries out unitary transformation and reverts to initial quantum information, and the unitary transformation is receiving terminal according to transmission
The operation that the Bell base junctions fruit that end and intermediate node are transmitted is taken, to revert to the quantum information of initial transmission.
Further, the quantum nodes in the quantum key distribution layer possess storage and forwarding capability.
Further, the method for building up of the quantum path is：Transmitting terminal transmits unknown quantum state (for example not to receiving terminal
Know three particle W entangled quantums states), it is contemplated that channel loss and decoherence phenomenon, k is set between transmitting terminal and receiving terminal
Quantum nodes, share EPR Entangled States between adjacent node, the number of Entangled State is equal to the quantum state number transmitted and (for example transmits
During three particle quantum states, EPR Entangled States are 3 pairs).
Further, the quantum path is made up of EPR Entangled States, and the number of EPR Entangled States is equal to and passes in every paths
Defeated quantum state number；And quantum path is made up of maximal entangled state, if partially entangled states can be turned by entanglement concentration
Maximal entangled state is turned to implement.
Beneficial effect：Foundation and two steps of setting of classical channel the invention mainly comprises quantum path, wherein measuring
Child node possesses storage and forwarding capability, and quantum path is made up of EPR Entangled States, number of EPR Entangled States etc. in every paths
In the quantum state number of transmission, classical channel takes parallel mode.Compared with prior art, the invention has the advantages that：
1st, quantum path is constituted using minimum particle EPR Entangled States, save resources, reduces cost.
2nd, classical channel takes parallel mode, greatly shortens transmission time, reduces time delay.
3rd, multiple nodes set the autgmentability and practicality for increasing network.
In sum, the present invention can be good at realizing any remote quantum network, transmission of quantum information, without auxiliary
Particle；Also have the advantages that simple to operation, time delay is few, cost-effective, expansible so that the application of quantum communication network is wider
It is general.
Specific embodiment
Technical solution of the present invention is described in detail below, but protection scope of the present invention is not limited to the implementation
Example.
The method for designing of a kind of remote quantum communication network in the present embodiment, comprises the following steps：
(1) quantum key distribution layer is set up, quantum network is constituted；
(2) quantum path is set up in quantum key distribution layer between quantum nodes, quantum path is made up of Entangled State；
(3) classical communication is combined with quantum key distribution layer：Classical channel and quantum key distribution layer are respectively at
Uplink and downlink link, quantum nodes and through code node correspond, quantum key distribution layer in quantum nodes possess storage and turn
Hair function；
(4) transmitting terminal and intermediate node do corresponding Bell bases measurement：The intermediate node refers to the amount in quantum link
The measurement of Bell bases is done at child node, transmitting terminal and each oneself node of leisure of intermediate node, is not interfere with each other；
(5) classical information of acquisition is transmitted directly to receiving terminal by transmitting terminal and intermediate node；The classical information refers to
By classical transmission to receiving terminal, transmission means takes parallel biography to the Bell base junctions fruit that transmitting terminal and intermediate node will be measured
It is defeated；
(6) received measurement result is carried out unitary transformation and reverts to initial quantum information, the unitary by receiving terminal
Conversion is the operation that the Bell base junctions fruit that receiving terminal is transmitted according to transmitting terminal and intermediate node is taken, to revert to initial transmission
Quantum information.
Wherein, the method for building up of quantum path is：Transmitting terminal transmits unknown quantum state to receiving terminal, it is contemplated that channel loss
And decoherence phenomenon, k quantum nodes are set between transmitting terminal and receiving terminal, EPR Entangled States are shared between adjacent node
(number is equal to the quantum state number of transmission), quantum path is made up of EPR Entangled States, the number of EPR Entangled States in every paths
Equal to the quantum state number of transmission；And quantum path is made up of maximal entangled state, if partially entangled states can be by tangling
Concentration is converted into maximal entangled state to implement.
Above-mentioned classical channel uses parallel mode, and transmitting terminal and K set up classical between receiving terminal respectively through code node
Channel.
Embodiment 1：
Transmitting terminal Alice transmits unknown three particle in Entangled W State to the receiving terminal Bob of distant location, it is contemplated that channel loss
And decoherence phenomenon, k quantum nodes (N is set between Alice and Bob1, N2, N3······Nk), adjacent segments
3 pairs of EPR Entangled States are shared between point.
Alice and k node do the measurement of Bell bases, and respective measurement result then is passed through into classical transmission to Bob,
Last Bob does unitary transformation to return to initial quantum state according to measurement result to the quantum state for transmitting.Whole transmitting procedure is produced
Raw time delay is from Bell measurements, measurement result transmission and unitary transformation, it is assumed that the time delay of each Bell measurements, every time measurement knot
The time delay of fruit transmission and the time delay of each unitary transformation are designated as d respectivelyB、dtAnd du, then the time delay produced in the present embodiment is total to
For：
d1=(k+1) dB+du+(k+1)dt
=(k+1) (dB+dt)+du
And the time delay that general classics multi-channel serial is set is：
d2=(k+1) dB+(k+1)du+(k+1)dt
=(k+1) (dB+du+dt)
Obvious d1<d2, therefore the solution of the present invention effectively reduces the latency issue of quantum state transmission.
Claims (4)
1. a kind of method for designing of remote quantum communication network, it is characterised in that：Comprise the following steps：
(1) quantum key distribution layer is set up, quantum network is constituted；
(2) quantum path is set up in quantum key distribution layer between quantum nodes, quantum path is made up of Entangled State；
(3) classical communication is combined with quantum key distribution layer：Classical channel and quantum key distribution layer are respectively at upper and lower
Line link, quantum nodes and through code node correspond；
(4) transmitting terminal and intermediate node do corresponding Bell bases measurement：The intermediate node refers to the quantum section in quantum link
The measurement of Bell bases is done at point, transmitting terminal and each oneself node of leisure of intermediate node, is not interfere with each other；
(5) classical information of acquisition is transmitted directly to receiving terminal by transmitting terminal and intermediate node；The classical information refers to send
, by classical transmission to receiving terminal, classical channel is using parallel transmission for the Bell base junctions fruit that end and intermediate node will be measured
Transmission means；
(6) receiving terminal carries out unitary transformation and reverts to initial quantum information, the unitary transformation be receiving terminal according to transmitting terminal and
The operation that the Bell base junctions fruit that intermediate node is transmitted is taken, to revert to the quantum information of initial transmission.
2. the method for designing of remote quantum communication network according to claim 1, it is characterised in that：The quantum key
Quantum nodes in distributing layer possess storage and forwarding capability.
3. the method for designing of remote quantum communication network according to claim 1, it is characterised in that：The step (2)
The method for building up of middle quantum path is：Transmitting terminal transmits unknown quantum state to receiving terminal, it is contemplated that channel loss and decoherence
Phenomenon, sets k quantum nodes between transmitting terminal and receiving terminal, shares EPR Entangled States between adjacent node, Entangled State it is individual
Number is equal to the quantum state number of transmission.
4. the method for designing of remote quantum communication network according to claim 3, it is characterised in that：The quantum path
It is made up of EPR Entangled States, the number of EPR Entangled States is equal to the quantum state number of transmission in every paths；And quantum path by
Maximal entangled state is constituted, if partially entangled states can be converted into maximal entangled state to implement by entanglement concentration.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107612689A (en) * | 2017-10-16 | 2018-01-19 | 苏州大学 | A kind of quantum state teleportation method transmitted based on bypass flow in quantum network |
| CN110401493A (en) * | 2019-08-22 | 2019-11-01 | 苏州新海宜电子技术有限公司 | A kind of intelligent self-organized network communication system based on quantum cryptography |
| WO2022033122A1 (en) * | 2020-08-14 | 2022-02-17 | 苏州浪潮智能科技有限公司 | Key management system |
| CN114448521A (en) * | 2022-02-22 | 2022-05-06 | 中国海洋大学 | Wide-area noise quantum network communication method and system based on OSPF (open shortest Path first) and quantum CSS (cascading style sheets) codes |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107612689A (en) * | 2017-10-16 | 2018-01-19 | 苏州大学 | A kind of quantum state teleportation method transmitted based on bypass flow in quantum network |
| CN107612689B (en) * | 2017-10-16 | 2020-10-13 | 苏州大学 | Quantum state invisible transmission method based on flow distribution transmission in quantum network |
| CN110401493A (en) * | 2019-08-22 | 2019-11-01 | 苏州新海宜电子技术有限公司 | A kind of intelligent self-organized network communication system based on quantum cryptography |
| WO2022033122A1 (en) * | 2020-08-14 | 2022-02-17 | 苏州浪潮智能科技有限公司 | Key management system |
| CN114448521A (en) * | 2022-02-22 | 2022-05-06 | 中国海洋大学 | Wide-area noise quantum network communication method and system based on OSPF (open shortest Path first) and quantum CSS (cascading style sheets) codes |
| CN114448521B (en) * | 2022-02-22 | 2023-10-27 | 中国海洋大学 | Wide area noise quantum network communication method and system based on OSPF and quantum CSS codes |
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Application publication date: 20170627 |