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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：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：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：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：US10749608B2
公开(公告)日：2020-08-18
申请号：US16592128
申请日：2019-10-03
发明人： Yongjing Cai , Liangliang Lu
IPC分类号： H04B10/70 , H01S5/062 , H04B10/508 , H04B10/85 , H04L9/08
摘要： Embodiments of this application relate to a signal receiving apparatus and method. The receiving apparatus includes: a signal receiving module, configured to detect a reference pulse signal in a received optical pulse signal where the optical pulse signal is the reference pulse signal and a quantum optical pulse signal; and a synchronization clock module, configured to obtain a modulation pulse signal based on the reference pulse signal. A first intensity modulator in the signal receiving module is configured to obtain, based on the modulation pulse signal, a first local-frequency optical pulse signal having same timing as the optical pulse signal, and the signal receiving module uses the first local-frequency optical pulse signal to interfere with the reference pulse signal and the quantum optical pulse signal separately to obtain a raw key.
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公开(公告)号：US20200044750A1
公开(公告)日：2020-02-06
申请号：US16592128
申请日：2019-10-03
发明人： Yongjing Cai , Liangliang Lu
IPC分类号： H04B10/70 , H01S5/062 , H04B10/85 , H04L9/08 , H04B10/508
摘要： Embodiments of this application relate to a signal receiving apparatus and method. The receiving apparatus includes: a signal receiving module, configured to detect a reference pulse signal in a received optical pulse signal where the optical pulse signal is the reference pulse signal and a quantum optical pulse signal; and a synchronization clock module, configured to obtain a modulation pulse signal based on the reference pulse signal. A first intensity modulator in the signal receiving module is configured to obtain, based on the modulation pulse signal, a first local-frequency optical pulse signal having same timing as the optical pulse signal, and the signal receiving module uses the first local-frequency optical pulse signal to interfere with the reference pulse signal and the quantum optical pulse signal separately to obtain a raw key.
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