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Operating a Layered Quantum Networking Environment with Fidelity Estimates

Resumen de: US20260322502A1

A first message is sent from a first node in a network indicating that a first quantum element at the first node is entangled with a second quantum element at a second node in the network. The first message comprises a first estimate of a fidelity of entanglement between the first and second quantum elements, and a timestamp indicating a time associated with the first estimate. Based at least in part on the first message, a second estimate of a fidelity of the entanglement between the first and second quantum elements is generated, at a second time after the time indicated by the timestamp, and is compared to each of multiple thresholds. At least a first (second) action is performed in response to a result of comparing the second estimate to a first (second) threshold.

QUANTUM KEY DISTRIBUTION CALIBRATION SETUP AND METHOD THEREOF

Resumen de: US20260322595A1

The present invention relates to Calibration system for calibrating a QKD emitter comprising said QKD emitter provided with a light source for generating light and an output connector for exiting the generated light, and a telecom characterization setup located at the output connector characterized in that the calibration system further comprises a pair of switchable connectors adapted to be switched between a first position where the connectors are exposed to the outside of the QKD emitter and a second position where the connectors are internally connected for providing a light path from the light source to the output connector, and an optical amplifier connected to the connectors switched in the first position for calibration procedure.

一种基于拓扑陈数调控的宏观量子态传输装置及其实现方法

Resumen de: CN122908844A

本发明公开了一种基于拓扑陈数调控的宏观量子态传输装置及其实现方法（星际之门）。所述装置包括具有相同非零拓扑陈数的发送端拓扑材料元件和接收端拓扑材料元件、外场发生装置、同步控制系统和量子态读出系统。所述方法通过同步调制发送端和接收端的投影角至临界值，使，固有时冻结，宏观物体的集体波函数通过高维纤维丛的公共拓扑分支瞬时重构于接收端。传输保真度由公式确定。本发明利用拓扑保护机制使宏观量子态传输对环境噪声不敏感，可在室温下实现瞬时传输，且驱动能量仅为焦耳级，具有工程可行性。

一种量子加密与PON信号共纤传输的信道噪声抑制方法及系统

Resumen de: CN122908839A

本发明涉及量子密钥分发与无源光网络共纤融合通信技术领域，公开了一种量子加密与PON信号共纤传输的信道噪声抑制方法及系统，该方法在局端将QKD发射机与PON发射机信号经拉曼抑制型波分复用器合波共纤传输，用户侧按5%:95分光，通过可调带阻滤波器实现频谱域基础噪声抑制，结合门控单光子探测与PON功率前馈调度完成时域噪声隔离，再基于拉曼噪声功率、PON发射功率及光纤长度的关联模型，反推实时噪声功率并动态闭环微调滤波器参数与PON发射功率，实现全场景自适应噪声抑制；本发明可将QKD接收端噪声计数率大幅度降低，成码率提升至15kbps，对PON业务影响小于0.1%，兼容现有设备、部署成本低，能有效保障量子加密通信稳定性与经典PON业务无感知传输。

一种多用户环形量子时间同步系统及方法

Resumen de: CN122908861A

本发明公开了一种多用户环形量子时间同步系统，包括基准站点和多个用户节点；所述基准站点和多个用户节点通过环形量子信道相连；本发明还公开了一种多用户环形量子时间同步方法，基于所述的一种多用户环形量子时间同步系统实现。本发明公开了一种多用户环形量子时间同步系统及方法，通过同时利用环形量子信道的顺时针方向和逆时针方向传输信号光，从而在一个用户节点与基准站点之间带来两种可行的时钟差，避免了使用单一时钟差而带来的误差和偶然性，能够有效提高时间同步的精度和可靠性，可广泛应用量子测量与量子高速成像领域。

양자 키 분배 네트워크를 위한 시스템 및 방법

Resumen de: WO2026151451A2

A system for implementing a quantum key distribution network, the system comprising: one or more quantum transmitters configured to transmit quantum encoded photons; a single state receiver, configured to receive the photons and determine encoded bits under a first protocol; a bell state receiver configured to receive quantum encoded photons under a second protocol; and a manager configured to determine a basis of encoding of the quantum encoded photons and to control communication between the one or more quantum transmitters and the single state receiver based on the first protocol or the bell state receiver based on the second protocol.

光送信機及び量子通信システム

Resumen de: EP4815342A1

0001 A quantum transmitter for use in a quantum communication system is provided, the transmitter comprising: a plurality of quantum state encoders, each encoder configured to emit portions of light, each portion encoded with a respective quantum state; and a beam combining module configured to receive portions of light emitted from each quantum state encoder, and combine the received portions to produce output light comprising a sequence of successive portions of light emitted by each encoder. A corresponding quantum communication system is also provided.

一种光传送网量子共纤组网的智能监测方法、装置及设备

Resumen de: CN122891144A

本申请提供了一种光传送网量子共纤组网的智能监测方法、装置及设备，有效地解决了现有的光传送网量子共纤组网采用的双系统分立运维架构无法保证量子共纤网络的可靠性、安全性与运维智能化水平的问题。该方法包括：计算出八维特征向量的量子维度偏差、物理衰耗维度偏差和振动维度偏差；执行三维正交判别及马氏距离置信度评估，得到归因判别结果；响应于链路衰减调整指令，强制联动计算SPD探测增益阈值修正量，并实时评估SPD入射光功率安全裕度，并执行链路衰减调整指令；融合以上过程产生的操作日志、归因判别结果与所述链路衰减调整指令对应的调度动作得到唯一事件标识，以在存证后完成智能监测。

一种基于光外差法的宽带线性调频脉冲信号产生方法

Resumen de: CN122883147A

本发明公开了一种基于光外差法的宽带线性调频脉冲信号产生方法，在由三段式分布式布拉格反射激光器、可调谐激光源、声光调制器、光耦合器和光电探测器组成的系统中，利用三段式分布式布拉格反射激光器产生线性啁啾光信号，利用可调谐激光源和声光调制器产生脉冲光载波，两路光信号在光电探测器中进行光外差拍频，从而在电域产生高线性宽带线性调频脉冲微波信号。本发明具有结构简单、扫频带宽可调、中心频率可调、脉冲参数可控和线性度高等优点，适用于宽带雷达、微波光子信号产生、目标探测以及通信感知一体化系统。

基于相干阵飞秒激光光源的大规模量子纠缠光子产生装置与方法

Resumen de: CN122891160A

本发明公开了一种基于相干阵飞秒激光光源的大规模量子纠缠光子产生装置与方法，包括：动相干阵DFB激光光源输出空间相位锁定且光谱窄线宽的光场；可调光谱整形模块根据控制指令选取目标光谱子带；将滤波后光谱子带导入宽带线性放大模块进行低噪声放大；量子时空协同控制单元根据实时滤波带宽与阵列折射率分布，计算并输出对应的色散或相位驱动信号，驱动自适应时空压缩模块执行动态匹配，使不同频率成分在时域重聚为变换极限飞秒脉冲序列；飞秒脉冲序列耦合至并行非线性量子转换阵列各单元，激发多通道信号‑闲频纠缠光子对；可编程量子干涉路执行多光子路径同步与相位对齐，使各通道纠缠光子在时域与相位域重聚，输出大规模可编程量子纠缠态。

SYSTEM AND METHOD FOR QUANTUM-ENABLED CYBER SECURITY IN A WIRELESS MOBILE NETWORK

Resumen de: US20260312993A1

0000 Aspects of the subject disclosure may include, for example, monitoring a security status of a wireless communication session comprising a back-haul link supporting a classical communication channel between a wireless access point and a wireless mobility core network. The classical communication channel is adapted to transport underlying data of the wireless communication session and, responsive to determining a change in the security status, associating with the wireless communication session a quantum communication channel adapted to transport information via qubits. Information is exchanged between the wireless access point and the mobility core network via the qubits of the quantum communication channel, wherein the exchanging of the information via the qubits enhances a security level of the wireless communication session in view of a perceived threat. Other embodiments are disclosed.

A Redundancy System and Switchable TIA

Resumen de: US20260312555A1

0000 A redundancy system features a switchable driver with multiple outputs, a switchable transimpedance amplifier (TIA) with multiple inputs, and multiple photonic data channels coupling the switchable driver outputs with the switchable TIA inputs. A redundancy management system assigns a photonic data channel for transmitting a data packet from the switchable driver to the switchable TIA, sends an acknowledgment upon receiving the data packet, waits for an acknowledgment within a timeout period, and reassigns a different data channel and resends the packet if no acknowledgment is received within the timeout period. The redundancy system ensures reliable data transmission by dynamically switching between photonic data channels in case of communication failures.

PHOTONIC QUANTUM COMPUTER ARCHITECTURE AND METHODS OF OPERATION

Resumen de: US20260311016A1

Entanglement among qubits can be generated using “rasterized” and interleaving techniques. A circuit can include a resource state generator that generates one resource state per clock cycle, with each resource state having a number of entangled qubits. The circuit can also include circuits and delay lines to perform entangling measurement operations on qubits of resource states generated by the same resource state generator in different clock cycles. With appropriate selection of delay lines, a single resource state generator can generate all of the resource states needed to generate a large entanglement structure. Hybrid techniques can also be used, where the number of resource state circuits is greater than one but less than the number of resource states needed to generate the entanglement structure.

OPTICAL TERMINAL FOR LIDAR AND OPTICAL COMMUNICATION AND METHOD FOR OPERATING

Resumen de: US20260309833A1

0000 An optical terminal for lidar and optical communication, with a transmitter section, including a first transmitter unit configured to emit a first communication signal at a first wavelength, a second transmitter unit configured to emit a first quantum signal at a second wavelength; and a receiver section, including a first receiver unit configured to receive a second communication signal at a third wavelength, a second receiver unit configured to receive a lidar signal at the first wavelength, and a controller configured to control an emission of the first transmitter unit and the second transmitter unit, extract data from the received communication signal, and determine a time-of-flight of the lidar signal based on the emission of the first communication signal. Also a method for operating an optical terminal.

TIME-BIN QUBIT CONVERTER

Resumen de: US20260311727A1

A system includes a first photonic integrated circuit. The circuit includes a qubit encoder configured to receive a spatial-mode qubit and convert the spatial-mode qubit to a temporal-mode qubit and an optical interconnect configured to receive and transmit the temporal-mode qubit. The system further includes a second photonic integrated circuit, itself including a qubit decoder configured to receive the temporal-mode qubit and convert the temporal-mode qubit back into the spatial-mode qubit.

MICROWAVE PHOTON BROADBAND PHASE-STABILIZED TRANSMISSION CENTER STATION BASED ON AMPLITUDE-PHASE MULTIPLEXING AND TRANSMISSION SYSTEM HAVING THE SAME

Resumen de: US20260312686A1

A microwave photon broadband phase-stabilized transmission center station based on amplitude-phase multiplexing and transmission system having the same are provided. The microwave photon broadband phase-stabilized transmission center station includes a sensing reference signal source configured to output a sensing reference signal, a modulation unit, and a delay adjustment unit. The modulation unit is configured to convert a broadband microwave signal to be transmitted to an optical domain to form a central station optical carrier broadband microwave signal, and load the sensing reference signal onto the central station optical carrier broadband microwave signal to form a composite optical carrier broadband microwave signal. The delay adjustment unit is configured to output the composite optical carrier broadband microwave signal to an optical fiber link after delaying, receive the loopback composite optical carrier broadband microwave signal, and compensate for a true delay fluctuation of the optical fiber link.

NONLOCALLY RANDOMIZED QUANTUM-AUGMENTED SECURITY

Resumen de: US20260312795A1

The inventors have developed methods and systems to address the above challenges using entangled photons with multiple colors transmitted with a classical data stream as a technique to detect eavesdropping on the data stream and to prevent reverse engineering for demodulating the entangled bits from the data stream. In some embodiments, a time gate is used to interleave the quantum and classic signals to provide quantum encryption of fiber optic communication protocols.

양자 통신 시스템에서 양자 대화 프로토콜을 수행하기 위한 장치 및 방법

Resumen de: WO2025170090A1

According to various embodiments of the present disclosure, an operation method of a first node in a communication system is provided, the method comprising the steps of: receiving at least one synchronization signal from a second node; receiving control information from the second node; receiving a first sequence of a first particle from the second node on the basis of the first particle and a second particle constituting an Einstein-Podolsky-Rosen pair (EPR pair); receiving an initial state of a second sequence of the second particle and combination information of a checking particle from the second node; and transmitting, to the second node, a first measurement result for the combination information and conversion information obtained by performing a logical operation on specific information.

偏光選択光子源

Nº publicación: JP2026159567A 07/10/2026

Solicitante:

株式会社東芝