CN209930270U - Quantum communication system based on single photon communication technology - Google Patents
Quantum communication system based on single photon communication technology Download PDFInfo
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- CN209930270U CN209930270U CN201920817564.2U CN201920817564U CN209930270U CN 209930270 U CN209930270 U CN 209930270U CN 201920817564 U CN201920817564 U CN 201920817564U CN 209930270 U CN209930270 U CN 209930270U
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Abstract
The utility model discloses a quantum communication system based on single photon communication technology, including sending terminal, transmission light path and receiving terminal, the sending terminal includes sending terminal FPGA controller and with this sending terminal FPGA controller electric connection's synchronous light laser instrument, first laser instrument, second laser instrument, third laser instrument, fourth laser instrument, modulation light path, just synchronous light laser instrument and first laser instrument, second laser instrument, third laser instrument, fourth laser instrument output optical signal of different frequencies; the receiving end comprises a receiving end FPGA controller, a demodulation light path, a synchronous optical detector, a first single-photon detector, a second single-photon detector, a third single-photon detector and a fourth single-photon detector, wherein the demodulation light path, the synchronous optical detector, the first single-photon detector, the second single-photon detector, the third single-photon detector and the fourth single-photon detector are electrically connected with the receiving end FPGA controller. The remarkable effects are as follows: the working frequency and the key generation rate of the whole system are improved, the safety is high, and the application range is wide.
Description
Technical Field
The utility model relates to nitrogen gas spring machining equipment technical field, concretely relates to quantum communication system based on single photon communication technology.
Background
The rapid development of computing technology and computing theory seriously threatens the security of public key cryptography, and although a private key cryptography system has extremely high security, the distribution problem limits the wide-range application of the private key cryptography system. Quantum communication takes photons or entangled photon pairs as a physical carrier of communication, takes the polarization and phase equivalent quantum attributes of the photons as information encoding objects, realizes secure Quantum Key Distribution (QKD) between two communication parties, and utilizes a one-time-pad password to realize information secure secret communication on the basis.
As a known absolutely secure communication means, quantum secure communication has a significant practical value in national security and national economy. In a quantum communication system, the maximum bearable channel loss of the communication system can be improved by adopting a single photon communication technology based on an optical fiber transmission medium, and further the transmission distance can be further increased. The single-photon secure communication device developed based on the BB84 protocol can be widely applied.
At present, a common quantum key distribution system is a quantum key distribution system based on four polarization state codes, which applies the BB84 quantum key distribution protocol. The traditional QKD inter-device communication omits a classical channel and replaces the classical channel with the classical channel to be directly time-division multiplexed with a quantum channel, so that the better safety of the system is ensured. However, this also causes a problem that the key generation rate is not high due to inevitable loss of the single-photon signal in the channel transmission, and the key generation rate is further lowered due to inevitable increase of the time required to run the same optical fiber for the base information.
Disclosure of Invention
The utility model aims at providing a be not enough to prior art, the utility model aims at providing a quantum communication system based on single photon communication technology, this system carries out the basic process when guaranteeing to produce the quantum key, can improve entire system's operating frequency and key generation rate, and the security is high.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a quantum communication system based on single photon communication technology is characterized in that: comprises a sending end, a transmission optical path and a receiving end,
the transmitting end comprises a transmitting end FPGA controller, a synchronous optical laser, a first laser, a second laser, a third laser, a fourth laser and a modulation optical path, wherein the synchronous optical laser, the first laser, the second laser, the third laser and the fourth laser are electrically connected with the transmitting end FPGA controller and output optical signals with different frequencies;
the receiving end comprises a receiving end FPGA controller, a demodulation light path, a synchronous optical detector, a first single-photon detector, a second single-photon detector, a third single-photon detector and a fourth single-photon detector, wherein the demodulation light path, the synchronous optical detector, the first single-photon detector, the second single-photon detector, the third single-photon detector and the fourth single-photon detector are electrically connected with the receiving end FPGA controller;
the transmitting end FPGA controller is used for simultaneously triggering the synchronous optical detector and one of the first to fourth lasers to transmit a synchronous optical signal and a quantum optical signal; the modulation optical path modulates the polarization state of the quantum optical signal to form a quantum optical key signal from the key information, and simultaneously outputs the quantum optical key signal and the synchronous optical signal to the transmission optical path after the quantum optical key signal and the synchronous optical signal are combined;
the demodulation optical path receives optical signals through the transmission optical path and splits the received optical signals with two frequencies into synchronous light and quantum light, wherein the synchronous light signals are sent to the synchronous light detector, and the synchronous light detector outputs synchronous signals to the FPGA controller at the receiving end; after receiving the synchronous signal, the FPGA controller at the receiving end generates a trigger signal according to a specific time sequence to trigger the single photon detector to work; the quantum optical signals are processed through a demodulation optical path and then sent to one of the corresponding first single-photon detector, the corresponding fourth single-photon detector and the corresponding fourth single-photon detector according to the polarization state, the single-photon detectors detect the quantum optical signals and then send detection data to the receiving end FPGA controller, and the receiving end FPGA controller samples and processes the detection signals of the single-photon detectors and then outputs quantum keys.
Further, the modulation optical path includes a first polarization beam splitter at the transmitting end, a second polarization beam splitter at the transmitting end, a polarization maintaining coupler, an attenuation mechanism, and a wavelength division multiplexer at the transmitting end, where the first polarization beam splitter at the transmitting end is used to split optical signals sent by the first laser and the second laser into a horizontal polarization quantum optical signal and a vertical polarization quantum optical signal respectively; the second polarization beam splitter at the transmitting end is used for splitting optical signals emitted by the third laser and the fourth laser into + 45-degree polarization quantum optical signals and-45-degree polarization quantum optical signals respectively; the polarization-maintaining coupler is used for stabilizing the polarization state of the quantum optical signal; the attenuation mechanism is used for adjusting the light intensity of the quantum optical signal; and the transmitting end wavelength division multiplexer outputs the quantum optical key signal and the synchronous optical signal to the transmission optical path after the quantum optical key signal and the synchronous optical signal are combined.
Further, the attenuation mechanism is a manual attenuator and/or an electric control attenuator.
Further, the center wavelength of the synchronous optical signal generated by the synchronous optical laser is 1310 nm; the central wavelength of the quantum light generated by the first laser, the second laser, the third laser and the fourth laser is 1550 nm.
Further, the demodulation optical path includes a receiving end wavelength division multiplexer, a coupler, a first polarization controller, a receiving end first polarization beam splitter, a second polarization controller, and a receiving end second polarization beam splitter, where the receiving end wavelength division multiplexer is configured to split a light signal received by the demodulation optical path into a quantum light signal and a synchronous light signal; the coupler is used for stabilizing the polarization state of the quantum optical signal; the first polarization controller is used for correcting the polarization state of the quantum optical signal input by the coupler and outputting the quantum optical signal to the first polarization beam splitter at the receiving end; the receiving end first polarization beam splitter is used for splitting a quantum optical signal and sending the quantum optical signal to the first single-photon detector or the second single-photon detector according to the polarization state; the second polarization controller corrects the polarization state of the quantum optical signal input by the coupler and outputs the quantum optical signal to the second polarization beam splitter at the receiving end; and the second polarization beam splitter of the receiving end is used for splitting the quantum optical signal and sending the quantum optical signal to the third single-photon detector or the fourth single-photon detector according to the polarization state.
Furthermore, interfaces externally connected with the human-computer interaction equipment or the key service equipment are reserved on the sending end FPGA controller and the receiving end FPGA controller
Furthermore, the transmitting end FPGA controller and the receiving end FPGA controller can realize joint debugging through an RJ45 network port.
Furthermore, the first single-photon detector, the second single-photon detector, the third single-photon detector and the fourth single-photon detector respectively correspond to a horizontal polarization quantum optical signal, a vertical polarization quantum optical signal, a + 45-degree polarization quantum optical signal and a-45-degree polarization quantum optical signal.
The sending end of the system generates quantum light, and key information is loaded on the quantum light by modulating the polarization state of the quantum light; quantum light carrying key information is transmitted to a receiving end through a transmission optical path; the receiving end carries out polarization decoding and detection on the quantum light; finally, the sending end carries out data exchange and data post-processing according to the loaded key information and the receiving end according to the measurement result and the quantum communication protocol to form the key result of the transmission
The utility model discloses a show the effect and be:
the system transmits the base information through the classical channel, realizes the dual functions of quantum communication and classical communication only by using quantum communication equipment, saves the volume and power consumption of the equipment and has wide application range; meanwhile, the synchronous light is 1310nm, and the quantum light is 1550 nm; combining the quantum light and the synchronous light at a transmitting end through a wavelength division multiplexer, splitting the quantum light and the synchronous light at a receiving end through the wavelength division multiplexer, enabling the synchronous light to enter a synchronous light detector for photoelectric conversion, and enabling the quantum light to enter a single photon detector for detection; the synchronous light and the quantum light both adopt 100MHz triggering frequency, the base information is transmitted through gigabit Ethernet, the base process is ensured to be carried out while the quantum key is generated, the working frequency and the key generation rate of the whole system are improved, and the base information is only original detection information but not a final key, so that even if the base information is stolen, the opposite side cannot crack, and the safety of the system is greatly improved.
Drawings
Fig. 1 is a block diagram of the present invention;
fig. 2 is a structure diagram of a modulation optical path of the transmitting end of the present invention;
fig. 3 the utility model discloses well demodulation light path structure chart of receiving terminal.
Detailed Description
The following provides a more detailed description of the embodiments and the operation of the present invention with reference to the accompanying drawings.
As shown in fig. 1, a quantum communication system based on single photon communication technology includes a transmitting end, a transmission optical path 18 and a receiving end, where:
the transmitting end comprises a transmitting end FPGA controller 1, a synchronous optical laser 2, a first laser 3, a second laser 4, a third laser 5, a fourth laser 6 and a modulation optical path 7, wherein the synchronous optical laser 2, the first laser 3, the second laser 4, the third laser 5, the fourth laser 6 and the modulation optical path 7 are electrically connected with the transmitting end FPGA controller 1;
the receiving end comprises a receiving end FPGA controller 8, a demodulation light path 9 electrically connected with the receiving end FPGA controller 8, a synchronous optical detector 10, a first single-photon detector 11, a second single-photon detector 12, a third single-photon detector 13 and a fourth single-photon detector 14;
the synchronous optical laser 2, the first laser 3, the second laser 4, the third laser 5 and the fourth laser 6 output optical signals with different frequencies;
the transmitting end FPGA controller 1 is used for triggering the synchronous optical detector 10 and one of the first laser 3, the second laser 4, the third laser 5 and the fourth laser 6 to transmit a synchronous optical signal and a quantum optical signal; the modulation optical path 7 modulates the polarization state of the quantum optical signal to form a quantum optical key signal from the key information, and the modulation optical path 7 combines the quantum optical key signal and the synchronous optical signal and outputs the combined signal to the transmission optical path 18;
a demodulation optical path 9 of a receiving end enters a transmission optical path 18 to receive an optical signal, and the received light with two frequencies is split into synchronous light and quantum light, wherein the synchronous light signal is sent to a synchronous light detector 10, and the synchronous light detector 10 outputs a synchronous signal to a receiving end FPGA controller 8; after receiving the synchronous signal, the FPGA controller at the receiving end generates a trigger signal according to a specific time sequence to trigger the single photon detector to work; the quantum optical signals are processed by the demodulation optical path 9 and then sent to the corresponding first single-photon detector 11, second single-photon detector 12, third single-photon detector 13 and fourth single-photon detector 14 according to the polarization state, wherein one single-photon detector detects the quantum optical signals and then sends the detection data to the receiving end FPGA controller 8, and the receiving end FPGA controller 8 samples and processes the detection signals of the single-photon detectors and then outputs quantum keys.
In this example, the transmitting end FPGA controller 1 and the receiving end FPGA controller 8 are both externally connected with a human-computer interaction device 15 and a key service device 16 through RJ45 network interfaces; the transmitting end FPGA controller 1 and the receiving end FPGA controller 8 can realize joint debugging through an RJ45 network port.
As can also be seen from fig. 1, a switching power supply 17 is disposed at both the transmitting end and the receiving end to provide operating power for each module.
As shown in fig. 2, the modulation optical path 7 includes a first polarization beam splitter at a transmitting end, a second polarization beam splitter at the transmitting end 7-2, a polarization maintaining coupler 7-3, a manual attenuator 7-4, an electronic control attenuator 7-5, and a wavelength division multiplexer at the transmitting end 7-6, where the first polarization beam splitter at the transmitting end 7-1 is configured to divide optical signals emitted by the first laser 3 and the second laser 4 into a horizontal polarization quantum optical signal and a vertical polarization quantum optical signal, respectively; the second polarization beam splitter 7-2 at the transmitting end is used for splitting optical signals emitted by the third laser 5 and the fourth laser 6 into + 45-degree polarization quantum optical signals and-45-degree polarization quantum optical signals respectively; the polarization-maintaining coupler 7-3 is used for stabilizing the polarization state of the quantum optical signal; the manual attenuator 7-4 and the electric control attenuator 7-5 are used for adjusting the light intensity of the quantum optical signal; and the transmitting end wavelength division multiplexer 7-6 combines the quantum optical key signal and the synchronous optical signal and outputs the combined signal to the transmission optical path 18.
Referring to fig. 3, the demodulation optical path 9 includes a receiving end wavelength division multiplexer 9-1, a coupler 9-2, a first polarization controller 9-3, a receiving end first polarization beam splitter 9-4, a second polarization controller 9-5, and a receiving end second polarization beam splitter 9-6, where the receiving end wavelength division multiplexer 9-1 is configured to split an optical signal received by the demodulation optical path 9 into a quantum optical signal and a synchronous optical signal, and the synchronous optical signal is sent to the synchronous optical detector 10; the coupler 9-2 is used for stabilizing the polarization state of the quantum optical signal; the first polarization controller 9-3 is used for correcting the polarization state of the quantum optical signal input by the coupler 9-2 and outputting the quantum optical signal to the first polarization beam splitter 9-4 at the receiving end; the receiving end first polarization beam splitter 9-4 is used for splitting a quantum optical signal and sending the quantum optical signal to the first single-photon detector 11 or the second single-photon detector 12 according to a polarization state; the second polarization controller 9-5 corrects the polarization state of the quantum optical signal input by the coupler 9-2 and outputs the quantum optical signal to the second polarization beam splitter 9-6 at the receiving end; the receiving end second polarization beam splitter 9-6 is used for splitting the quantum optical signal and sending the quantum optical signal to a third single-photon detector 13 or a fourth single-photon detector 14 according to the polarization state, and the first single-photon detector 11, the second single-photon detector 12, the third single-photon detector 13 and the fourth single-photon detector 14 respectively correspond to a horizontal polarization quantum optical signal, a vertical polarization quantum optical signal, a + 45-degree polarization quantum optical signal and a-45-degree polarization quantum optical signal.
In the specific implementation process, the communication process of the system is as follows:
the FPGA device at the transmitting end is connected with the human-computer interaction device 15 and the key service device 16 through RJ45 ports, and after the collected data are processed, one of the first laser device 3, the second laser device 4, the third laser device 5 and the fourth laser device 6 and the synchronous optical laser device 2 are triggered to simultaneously emit quantum optical signals and synchronous optical signals in an electric signal mode, wherein the central wavelength of the synchronous optical signals is 1310nm, the central wavelength of the quantum optical signals is 1550nm, and two optical pulses are generated at the output end of the modulation optical path 7. The first output light pulse is synchronous light, and the second output light pulse is quantum light. The light intensity of the quantum light can be adjusted through the manual attenuator 7-4 and the electric control attenuator 7-5;
quantum optical signals emitted by the first laser 3 and the second laser 4 are respectively divided into horizontal polarization quantum optical signals and vertical polarization quantum optical signals by a first polarization beam splitter 7-1 at a sending end; optical signals emitted by the third laser 5 and the fourth laser 6 are respectively divided into + 45-degree polarization quantum optical signals and-45-degree polarization quantum optical signals by a second polarization beam splitter 7-2 at a sending end;
the synchronous optical signal and the quantum optical signal output by the modulation optical path 7 are combined by the wavelength division multiplexer 7-6 at the transmitting end and then are transmitted to the receiving end through the transmission optical path 18;
a receiving end wavelength division multiplexer 9-1 in the demodulation optical path 9 splits a received optical signal into quantum light and synchronous light; after synchronous light is sent to an FPGA controller at a receiving end of the synchronous light detector 10 and receives a synchronous signal, a trigger signal is generated according to a specific time sequence to trigger the single-photon detector to work; after the quantum optical signal is processed by the rest part in the demodulation optical path 9, namely a coupler 9-2, a first polarization controller 9-3, a first polarization beam splitter 9-4 at a receiving end or a coupler 9-2, a second polarization controller 9-5 and a second polarization beam splitter 9-6 at the receiving end, the quantum optical signal is sent to a first single-photon detector 11, a second single-photon detector 12, a third single-photon detector 13 or a fourth single-photon detector 14 according to the polarization state, and the first single-photon detector 11, the second single-photon detector 12, the third single-photon detector 13 and the fourth single-photon detector 14 respectively correspond to a horizontal polarization quantum optical signal, a vertical polarization quantum optical signal, a + 45-degree polarization quantum optical signal and a-45-degree polarization quantum optical signal;
the first single-photon detector 11, the second single-photon detector 12, the third single-photon detector 13 or the fourth single-photon detector 14 detect the quantum optical signals and then send the detected data to the receiving end FPGA controller 8, the receiving end FPGA controller 8 samples and processes the detected signals of the single-photon detectors and then outputs quantum keys, and the quantum keys are output to the human-computer interaction device 15 or the key service device 16 through the RJ45 port, so that the safe transmission of the data is completed.
The technical scheme provided by the utility model is introduced in detail above. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.
Claims (8)
1. The utility model provides a quantum communication system based on single photon communication technology, includes sending terminal, transmission light path and receiving terminal, its characterized in that:
the transmitting end comprises a transmitting end FPGA controller, a synchronous optical laser, a first laser, a second laser, a third laser, a fourth laser and a modulation optical path, wherein the synchronous optical laser, the first laser, the second laser, the third laser and the fourth laser are electrically connected with the transmitting end FPGA controller and output optical signals with different frequencies;
the receiving end comprises a receiving end FPGA controller, a demodulation light path, a synchronous optical detector, a first single-photon detector, a second single-photon detector, a third single-photon detector and a fourth single-photon detector, wherein the demodulation light path, the synchronous optical detector, the first single-photon detector, the second single-photon detector, the third single-photon detector and the fourth single-photon detector are electrically connected with the receiving end FPGA controller;
the transmitting end FPGA controller is used for simultaneously triggering the synchronous optical detector and one of the first to fourth lasers to transmit a synchronous optical signal and a quantum optical signal; the modulation optical path modulates the polarization state of the quantum optical signal to form a quantum optical key signal from the key information, and simultaneously outputs the quantum optical key signal and the synchronous optical signal to the transmission optical path after the quantum optical key signal and the synchronous optical signal are combined;
the demodulation optical path receives optical signals through the transmission optical path and splits the received optical signals with two frequencies into synchronous light and quantum light, wherein the synchronous light signals are sent to the synchronous light detector, and the synchronous light detector outputs synchronous signals to the FPGA controller at the receiving end; after receiving the synchronous signal, the FPGA controller at the receiving end generates a trigger signal according to a specific time sequence to trigger the single photon detector to work; the quantum optical signals are processed through a demodulation optical path and then sent to one of the corresponding first single-photon detector, the corresponding fourth single-photon detector and the corresponding fourth single-photon detector according to the polarization state, the single-photon detectors detect the quantum optical signals and then send detection data to the receiving end FPGA controller, and the receiving end FPGA controller samples and processes the detection signals of the single-photon detectors and then outputs quantum keys.
2. The quantum communication system based on the single photon communication technology of claim 1, wherein: the modulation optical path comprises a sending end first polarization beam splitter, a sending end second polarization beam splitter, a polarization maintaining coupler, an attenuation mechanism and a sending end wavelength division multiplexer, wherein the sending end first polarization beam splitter is used for splitting optical signals sent by a first laser and a second laser into a horizontal polarization quantum optical signal and a vertical polarization quantum optical signal respectively; the second polarization beam splitter at the transmitting end is used for splitting optical signals emitted by the third laser and the fourth laser into + 45-degree polarization quantum optical signals and-45-degree polarization quantum optical signals respectively; the polarization-maintaining coupler is used for stabilizing the polarization state of the quantum optical signal; the attenuation mechanism is used for adjusting the light intensity of the quantum optical signal; and the transmitting end wavelength division multiplexer outputs the quantum optical key signal and the synchronous optical signal to the transmission optical path after the quantum optical key signal and the synchronous optical signal are combined.
3. The quantum communication system based on the single photon communication technology of claim 2, wherein: the attenuation mechanism is a manual attenuator and/or an electric control attenuator.
4. The quantum communication system based on the single photon communication technology of claim 1, wherein: the central wavelength of a synchronous optical signal generated by the synchronous optical laser is 1310 nm; the central wavelength of the quantum light generated by the first laser, the second laser, the third laser and the fourth laser is 1550 nm.
5. The quantum communication system based on the single photon communication technology of claim 1, wherein: the demodulation optical path comprises a receiving end wavelength division multiplexer, a coupler, a first polarization controller, a receiving end first polarization beam splitter, a second polarization controller and a receiving end second polarization beam splitter, wherein the receiving end wavelength division multiplexer is used for splitting optical signals received by the demodulation optical path into quantum optical signals and synchronous optical signals; the coupler is used for stabilizing the polarization state of the quantum optical signal; the first polarization controller is used for correcting the polarization state of the quantum optical signal input by the coupler and outputting the quantum optical signal to the first polarization beam splitter at the receiving end; the receiving end first polarization beam splitter is used for splitting a quantum optical signal and sending the quantum optical signal to the first single-photon detector or the second single-photon detector according to the polarization state; the second polarization controller corrects the polarization state of the quantum optical signal input by the coupler and outputs the quantum optical signal to the second polarization beam splitter at the receiving end; and the second polarization beam splitter of the receiving end is used for splitting the quantum optical signal and sending the quantum optical signal to the third single-photon detector or the fourth single-photon detector according to the polarization state.
6. The quantum communication system based on the single photon communication technology of claim 1, wherein: and interfaces externally connected with the human-computer interaction equipment or the key service equipment are reserved on the transmitting end FPGA controller and the receiving end FPGA controller.
7. The quantum communication system based on the single photon communication technology of claim 6, wherein: the transmitting end FPGA controller and the receiving end FPGA controller can realize joint debugging through an RJ45 network port.
8. The quantum communication system based on the single photon communication technology of claim 1, wherein: the first single-photon detector, the second single-photon detector, the third single-photon detector and the fourth single-photon detector respectively correspond to a horizontal polarization quantum optical signal, a vertical polarization quantum optical signal, a + 45-degree polarization quantum optical signal and a-45-degree polarization quantum optical signal.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111970280A (en) * | 2020-08-18 | 2020-11-20 | 中南大学 | Attack detection method of continuous variable quantum key distribution system |
| CN114528021A (en) * | 2022-01-28 | 2022-05-24 | 中国人民解放军战略支援部队信息工程大学 | Time-sharing multiplexing quantum measurement and control system and low-power-consumption high-efficiency quantum measurement and control compiling method |
| CN116318433A (en) * | 2023-05-24 | 2023-06-23 | 国开启科量子技术(北京)有限公司 | Synchronization method and system for quantum communication |
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2019
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111970280A (en) * | 2020-08-18 | 2020-11-20 | 中南大学 | Attack detection method of continuous variable quantum key distribution system |
| CN111970280B (en) * | 2020-08-18 | 2022-05-06 | 中南大学 | Attack detection method of continuous variable quantum key distribution system |
| CN114528021A (en) * | 2022-01-28 | 2022-05-24 | 中国人民解放军战略支援部队信息工程大学 | Time-sharing multiplexing quantum measurement and control system and low-power-consumption high-efficiency quantum measurement and control compiling method |
| CN114528021B (en) * | 2022-01-28 | 2022-11-08 | 中国人民解放军战略支援部队信息工程大学 | Time-sharing multiplexing quantum measurement and control system and low-power-consumption high-efficiency quantum measurement and control compiling method |
| CN116318433A (en) * | 2023-05-24 | 2023-06-23 | 国开启科量子技术(北京)有限公司 | Synchronization method and system for quantum communication |
| CN116318433B (en) * | 2023-05-24 | 2023-08-18 | 国开启科量子技术(北京)有限公司 | Synchronization method and system for quantum communication |
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