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公开(公告)号：US20210279630A1
公开(公告)日：2021-09-09
申请号：US17243072
申请日：2021-04-28
发明人： Zhengyu Li , Changzheng Su , Yang Zou , Yongjing Cai
摘要： A quantum bit control apparatus, including a control signal generator, optoelectronic detectors, a quantum chip, and a shielding apparatus, the optoelectronic detectors are disposed in the shielding apparatus, and an inner part of the shielding apparatus is in a vacuum state. The control signal generator is disposed in a first temperature area, and is configured to generate optical control signals and send the N optical control signals to the optoelectronic detectors. The optoelectronic detectors are disposed in a second temperature area having a temperature lower than of the first temperature area. The N optoelectronic detectors are configured to convert the received optical control signals into electronically controlled signals and send the electronically controlled signals to the quantum chip. The quantum chip is disposed in the second temperature area, and controls a quantum bit in the quantum chip based on the electronically controlled signals.
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公开(公告)号：US11044016B2
公开(公告)日：2021-06-22
申请号：US16717427
申请日：2019-12-17
发明人： Zhengyu Li , Changzheng Su , Liangliang Lu
摘要： A data transmission method to avoid a channel resource waste where first random data and second random data are generated by a sending device; at least two pieces of reference data are determined; a modulation signal based on the first random data, the second random data, and the at least two pieces of reference data are generated; a component in a first polarization direction and a component in a second polarization direction of a first laser signal by using the modulation signal are modulated by the sending device, to obtain a second laser signal, where the first polarization direction and the second polarization direction are perpendicular to each other, and the second laser signal includes a quantum light and a reference light; and the second laser signal is sent by the sending device.
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公开(公告)号：US11875223B2
公开(公告)日：2024-01-16
申请号：US17243072
申请日：2021-04-28
发明人： Zhengyu Li , Changzheng Su , Yang Zou , Yongjing Cai
摘要： A quantum bit control apparatus, including a control signal generator, optoelectronic detectors, a quantum chip, and a shielding apparatus, the optoelectronic detectors are disposed in the shielding apparatus, and an inner part of the shielding apparatus is in a vacuum state. The control signal generator is disposed in a first temperature area, and is configured to generate optical control signals and send the N optical control signals to the optoelectronic detectors. The optoelectronic detectors are disposed in a second temperature area having a temperature lower than of the first temperature area. The N optoelectronic detectors are configured to convert the received optical control signals into electronically controlled signals and send the electronically controlled signals to the quantum chip. The quantum chip is disposed in the second temperature area, and controls a quantum bit in the quantum chip based on the electronically controlled signals.
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公开(公告)号：US20230359920A1
公开(公告)日：2023-11-09
申请号：US18344427
申请日：2023-06-29
发明人： Yanxing Luo , Zhengyu Li
IPC分类号： G06N10/40
CPC分类号： G06N10/40
摘要： A quantum bit control apparatus includes a first coupling means configured to receive a plurality of frequency-mixed control signals of different frequencies from a first transmission medium, and send the plurality of frequency-mixed control signals of different frequencies to the signal extraction means. A second coupling means is configured to receive local oscillation signals from a second transmission medium, and send the local oscillation signals to the signal extraction means. The frequency-mixed control signals and the local oscillation signals are generated in a first temperature region, and a temperature of the first temperature region is higher than that of the second temperature region. A signal extraction means filters the received frequency-mixed control signals and the received local oscillation signals, and performs down-conversion on the filtered control signals and the filtered local oscillation signals to restore a control signal that is used to manipulate a quantum bit in the quantum chip.
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公开(公告)号：US20230178355A1
公开(公告)日：2023-06-08
申请号：US18159859
申请日：2023-01-26
发明人： Weimin Lv , Zhengyu Li , Yangchao Shen
CPC分类号： H01J49/4255 , H01J49/161 , H01J49/426
摘要： An ion trap system and an ion trapping method are provided. The ion trap system may include: an ion source, configured to: generate an ion, and shoot the ion to an ion trap; the electromagnetic field device, configured to change a moving direction of the ion, to transfer the ion to an ion trap; and the ion trap, configured to trap the ion transferred by the electromagnetic field device. The electromagnetic field device changes the moving direction of the ion, to transfer the ion to the ion trap.
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公开(公告)号：US20200266978A1
公开(公告)日：2020-08-20
申请号：US16868789
申请日：2020-05-07
发明人： Zhengyu Li , Changzheng Su , Yang Zou , Yongjing Cai
IPC分类号： H04L9/08 , H04B10/64 , H04B10/556 , H03M1/12 , G02B27/28
摘要： A key generation method includes modulating a first key to a first light source signal, to obtain a modulated optical signal, splitting the modulated optical signal, to obtain a first sub modulated optical signal and a second sub modulated optical signal, attenuating the first sub modulated optical signal such that a quantity of photons included in each period of the first sub modulated optical signal is less than a preset value, and sending an attenuated first sub modulated optical signal to a receive-end device, and obtaining a second key carried in the second sub modulated optical signal, and storing the second key.
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公开(公告)号：US11595196B2
公开(公告)日：2023-02-28
申请号：US17069317
申请日：2020-10-13
发明人： Zhengyu Li , Changzheng Su , Su Hu , Yang Zou
摘要： This application provide quantum key distribution methods, devices, and storage media. In an implementation, a method comprises: determining, based on a first mapping, a first quantum key of N first quantum keys corresponding to an ith node on a target routing path; determining, based on a second mapping, a second quantum key of N second quantum keys corresponding to the ith node; and generating, by the ith node based on the first quantum key corresponding to the ith node and the second quantum key corresponding to the ith node, a third quantum key corresponding to the ith node on the target routing path.
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公开(公告)号：US11444758B2
公开(公告)日：2022-09-13
申请号：US16868789
申请日：2020-05-07
发明人： Zhengyu Li , Changzheng Su , Yang Zou , Yongjing Cai
IPC分类号： H04L9/08 , G02B27/28 , H03M1/12 , H04B10/556 , H04B10/64
摘要： A key generation method includes modulating a first key to a first light source signal, to obtain a modulated optical signal, splitting the modulated optical signal, to obtain a first sub modulated optical signal and a second sub modulated optical signal, attenuating the first sub modulated optical signal such that a quantity of photons included in each period of the first sub modulated optical signal is less than a preset value, and sending an attenuated first sub modulated optical signal to a receive-end device, and obtaining a second key carried in the second sub modulated optical signal, and storing the second key.
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公开(公告)号：US11329810B2
公开(公告)日：2022-05-10
申请号：US16817125
申请日：2020-03-12
发明人： Zhengyu Li , Changzheng Su
IPC分类号： H04L9/08 , H04B10/516 , H04B10/70
摘要： This application discloses a continuous-variable quantum key distribution (CV-QKD) device and method. The device includes a light source, a modulation unit, a first random number generator, and a processor, where the processor is configured to obtain a first data sequence based on a preset quantity of modulation format symbols, a distribution probability of each symbol, and a first random number sequence generated by the first random number generator, and obtain a second data sequence based on the first data sequence; and the modulation unit is configured to modulate, based on to the first data sequence, a signal emitted by the light source to output a second optical signal, where the second optical signal does not need to include quantum states with a quantity in an order of magnitude of 28×28 required in an existing Gaussian protocol.
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公开(公告)号：US20210327605A1
公开(公告)日：2021-10-21
申请号：US17359909
申请日：2021-06-28
发明人： Yangchao Shen , Zhengyu Li , Changzheng Su
摘要： An ion trap system includes a laser adjustment and control module configured to split a light beam into P first light beams and Q second light beams. N first light beams in the P first light beams are transmitted to N ions, respectively, and tM second light beams in the Q second light beams are transmitted to M monitoring units, respectively. The M monitoring units are configured to monitor the M second light beams, respectively, and obtain spatial information of the M second light beams. The system further includes a feedback control module configured to receive the spatial intensity distribution information of the M second light beams, determine N first control signals based on the spatial information of the M second light beams, and transmit the N first control signals to the laser adjustment and control module.
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