Alerta

ROUTING PROTOCOL FOR AVOIDING SPACE DEBRIS IN COMMUNICATIONS

Absstract of: US20260189300A1

0000 Systems and techniques may generally be used for communication with a satellite. An example technique may include identifying a path from a first device to a second device, at least one of the first device or the second device being a satellite, determining a set of three or more celestial objects, wherein locations of the set of three or more celestial objects and a location of the first device define a field of view, and retrieving debris vector information corresponding to space debris that is projected to intersect a portion of the field of view over a specified time window. The example technique may include determining, within the specified time window, a sub-window where the field of view is clear from the space debris based on the debris vector information, and outputting an indication of the sub-window for sending a signal from the first device to the second device.

SYSTEM AND METHOD FOR LONG-DISTANCE QUANTUM-CAPABLE INTERNET

Absstract of: AU2024440837A1

A Quantum-enabled Internet (QEI) including quantum-enabling networking architectures integrating advanced communication systems with long-distance quantum communication hardware and methods of operating the same. Using a quantum-network (QN) design paradigm, there is provided a physics-centric stack-based quantum network paradigm to govern the dynamics of multiple light-matter Hamiltonians across distant nodes. This QN network facilitates a fundamental long-distance quantum network service - that of high-visibility Hong-Ou-Mandel interference of telecom quantum states generated in two independent, telecom-compatible quantum light-matter interfaces separated by a distance. The QN paradigm design can be applied to demonstrate scalable long-distance QN services in an QN infrastructure, including the transmission of polarization entanglement created by high repetition sources of entangled photons and the storage of telecom polarization entanglement using remotely located quantum memories capable of heralding the storage of entanglement using non-demolition measurements and quantum state tomography.

MULTI-WAY FUSION CIRCUITS FOR PHOTONIC QUBITS USING HADAMARD INTERFEROMETERS

Absstract of: WO2026143193A1

Multi-way fusion circuits using Hadamard interferometers can perform fusion operations on four or more input qubits, each of which may initially be part of a separately-entangled system of qubits. When the fusion operation succeeds, the four or more input qubits are consumed in a projective entangling measurement that also results in creating a single entangled system that includes the remaining qubits of the initial separately-entangled systems.

MULTI-WAY FUSION CIRCUITS FOR PHOTONIC QUBITS

Absstract of: AU2024438646A1

Multi-way fusion circuits can perform fusion operations on three or more input qubits, each of which may initially be part of a separately-entangled system of qubits. When the fusion operation succeeds, the three or more input qubits are consumed in a projective entangling measurement that also results in creating a single entangled system that includes the remaining qubits of the initial separately-entangled systems.

SINGLE-DETECTOR BELL-STATE MEASUREMENT DEVICE

Absstract of: EP4769978A1

A Bell state measurement device comprising first and second optical input fiber to respectively pass first and second photon comprising a first component and a second component, and a third component and a fourth component, an optical beam splitter configured to receive first and second photon respectively from first and second optical input fiber and to combine first and second photon into third and fourth photon; first and second optical output fiber to receive third and fourth photon, the second optical output fiber comprises a delay line; and a single-photon detector configured to receive third and fourth photon from first optical output fiber, or delayed third photon and delayed fourth photon from second optical output fiber, or third photon from first optical output fiber and delayed fourth photon from second optical output fiber, or fourth photon from first optical output fiber and delayed third photon from second optical output fiber.

MICROWAVE-OPTICAL PHOTON INTERFACE APPARATUS AND METHOD

Absstract of: WO2025170628A1

Microwave-optical interface apparatus and methods are disclosed. In one example embodiment, a microwave-optical interface apparatus comprises: a microwave cavity operable to, at least, host at least one microwave signal photon; and an optical cavity comprising a plurality of embedded defects, the optical cavity operable to, at least, host at least one optical signal photon and at least one optical pump electric field, the optical cavity positioned relative to the microwave cavity to cause, using the plurality of embedded defects and induced by the at least one optical pump electric field, three-wave mixing magneto-optic transduction between the at least one microwave signal photon, the at least one optical signal photon and the at least one optical pump electric field within the optical cavity; wherein the at least one optical signal photon and the at least one optical pump electric field are evanescently confined within the optical cavity in at least two dimensions.

故障感知方法、QKD节点及故障感知系统

Absstract of: CN122316612A

本申请实施例公开了一种故障感知方法、QKD节点及故障感知系统，属于量子技术领域。在该方法中，QKDN中的第一QKD节点接收第一密钥中继报文，响应于第一QKD节点转发第一量子密钥出现故障，第一QKD节点向密钥分发源节点发送故障的故障描述信息。通过本申请实施例，在密钥分发源节点向密钥分发目的节点发送密钥中继报文后，对于该密钥中继报文的转发路径上的任一QKD节点，该QKD节点在接收到该密钥中继报文时，如果转发该密钥中继报文时出现故障，该QKD节点则向密钥分发源节点发送该故障的故障描述信息。从而使得密钥分发源节点在分发量子密钥后能够实时感知密钥分发过程中出现的故障。

集中式量子密钥中继方法、QKD网络控制器、中继节点及系统

Absstract of: CN122316614A

本发明公开了一种集中式量子密钥中继方法、QKD网络控制器、中继节点及系统，方法包括在本次用户请求密钥开始前，基于量子网络内各网络节点的密钥消耗需求生成密钥调度策略；根据所述密钥调度策略向相应的路径节点发送密钥异或信息请求，以使相应的所述路径节点按照所述密钥异或信息请求返回密钥异或信息，所述密钥异或信息携带上下行密钥异或值和密钥链路信息；根据所述密钥链路信息，将属于同一密钥链路上各路径节点上传的密钥异或值按序串联，并将串联成功的各组密钥异或值进行异或处理，得到链路异或结果并将所述链路异或结果发送至目的节点；本发明可显著减少密钥资源浪费及降低用户请求密钥延时，且尤其适用于复杂结构组网拓扑。

跨域集中式量子密钥中继方法、QKD网络控制器及系统

Absstract of: CN122316615A

本发明公开了一种跨域集中式量子密钥中继方法、QKD网络控制器及系统，方法包括向中继路径上各节点所属域的域内QKD网络控制器下发跨域密钥请求信息，以使相应的域内QKD网络控制器基于所述跨域密钥请求信息返回中转密钥异或值，所述中转密钥异或值为本域的中继密钥与域间中转密钥之间的异或值；接收各所述域内QKD网络控制器上传的所述中转密钥异或值，并对各所述中转密钥异或值进行异或运算，得到跨域密钥异或结果；将所述跨域密钥异或结果下发至目的域的域内QKD网络控制器，以使目的域的域内QKD网络控制器将所述跨域密钥异或结果下发至目的节点；本发明实现了跨域量子密钥集中式调度。

一种通密一体量子共纤发送及接收装置、方法和传输系统

Absstract of: CN122316493A

本发明公开了一种通密一体量子共纤发送及接收装置、方法和传输系统，涉及光通信技术领域。该通密一体量子共纤发送装置包括量子信号合波单元和N‑1个经典信号合波单元。N‑1个经典信号合波单元中，首个经典信号合波单元将输入的任意两个不同波长的经典光信号合波后，输出至下个经典信号合波单元，并通过下个经典信号合波单元完成与又一波长的经典光信号的合波；直至末个经典信号合波单元完成与最后一波长的经典光信号的合波后，将合波后的经典光信号输出至量子信号合波单元；量子信号合波单元将输入的经典光信号与量子光信号进行合波后输出。本发明能实现兼容多波段光通信系统（如OTN系统）的量子共纤传输，满足实际应用需求。

一种自由空间量子密钥分发光学系统及方法

Absstract of: CN122316492A

本发明提供了一种自由空间量子密钥分发光学系统及方法，本发明光学望远镜采用透射式光学望远镜和简化的后光路终端，可以有效避免次镜遮拦和渐晕现象，光学望远镜系统轴向尺寸较小且同口径下重量相较卡式反射式望远镜更轻，更适合在短距离自由空间量子通信中规模化使用，能够做到单人携带和部署，具备全天时量子密钥分发能力。同时发射望远镜和接收望远镜两者之间可以互换使用，即系统既可以作为发射端，也可以作为接收端，可以将量子通信覆盖到光纤和卫星难以达到的区域，也可以满足各种紧急和突发状况下的快速调用。

一种QKD系统相位反馈方法、装置及QKD系统

Absstract of: CN122316491A

本发明涉及量子通信技术领域，提供了一种QKD系统相位反馈方法，具体为：QKD系统发送端光源装置产生单一相位态光信号，经过衰减器调节至稳定光强后进入光纤信道，并输入到接收端；在接收端，通过不等臂M‑Z干涉仪对光脉冲进行干涉，将干涉后的光送给两路探测器D0和D1产生探测计数分别为X0和X1；采用出厂前已完成系统参数标定的反馈算法和反馈控制模块收集所述探测计数，根据相位反馈算法计算并下发控制电压对光纤移相器FPS进行控制调节，使得两路探测器计数比X0/X1，即对比度C，大于满足QKD系统成码要求的阈值。通过上述方法，提高了复杂环境下的主动相位补偿的速度和精度。

空間伝送光通信システムにおける光学調整方法および装置

Absstract of: US20260172109A1

0000 An optical communication device includes a focus-adjustable optical system that focuses guide light having the same optical axis as signal light onto its focus position, thereby illuminating the light receiving surface over a wide range including a light reception area as a target area. A predetermined pattern is provided around the light reception area. When part of the predetermined pattern is illuminated by the guide light, a controller recognizes a partial pattern of the predetermined pattern from the image captured by a camera. Based on the partial pattern, the controller adjusts the focus-adjustable optical system so that the partial pattern matches a predetermined part of the predetermined pattern, allowing the signal light to be accurately directed to the light reception area.

Delay time error measurement device based on fiber optic interferometer

Absstract of: KR20260100044A

본 발명은 광섬유 간섭계 기반의 지연 시간 오차 측정 장치에 관한 것으로서, 상세하게는 포토커플러에 의해 포톤 신호를 두 개의 경로로 나누고, 하나는 피드백 회로로, 다른 하나는 10센티미터 거리로 지연되도록 제어하는 기술을 제공하는 것으로서, 이를 통해 시간 지연 오차를 1ps 이하로 유지하며 신뢰성을 확보할 수 있는 광섬유 간섭계 기반의 지연 시간 오차 측정 장치에 관한 것이다. 본 발명에 의하면, 기준 경로와 감지 경로 사이의 시간 차이를 500ps로 고정하고 그 오차를 1ps 이하로 억제함으로써, 두 신호가 광섬유 마이켈슨 간섭계에서 형성하는 간섭 패턴의 위상차를 정확하게 제어할 수 있다. 이를 통해 수신부에서 검출되는 간섭무늬가 선명하게 유지되며, 양자 비트(Quantum Bit) 판별 시 발생하는 시간적, 위상적 오차가 최소화된다.

一种量子态传输方法、装置及量子计算机

Absstract of: CN122293210A

本发明涉及量子计算机技术领域，具体涉及一种量子态传输方法、装置及量子计算机，本申请通过基于待传输给分布式量子处理器的量子线路和分布式量子处理器，确定量子线路传输给分布式量子处理器的子处理器的最佳分配组合，其中，最佳分配组合是指量子线路的量子比特分配给子处理器时，由不同子处理器上的比特上作用的两量子逻辑形成的全局门权重最小化、全局门分散程度最大化的量子线路，从而降低分布式量子线路内量子通信的频率和通信成本，同时，通过确定目标传输比特确定和相关联的关联全局门作为选定全局门的传输队列参数实现全局门的合并传输，可降低量子态传输次数，有效提升分布式的量子线路的计算效率。

一种量子线路切割方法、装置及量子计算机

Absstract of: CN122293312A

本发明涉及量子计算机技术领域，具体涉及一种量子线路切割方法、装置及量子计算机，本申请基于量子线路的量子比特加权图对节点进行预划分得到若干组节点集合，将权重和值最小的一组或多组目标节点集合作为筛选结果，权重和值最小表征量子线路划分后的全局门数量最小，当存在多组目标节点集合的权重和值最小时，根据每组目标节点集合之间的边线数量和权重和值确定边线离散程度最大的一组目标节点集合以切割所述量子线路，边线离散程度越大表示量子态的传输成本越低，通过最小化权重和值和最大化边线离散程度减轻量子态的传输次数，降低通信传输成本，提升量子线路的计算效率。

SYSTEME ET PROCEDE DE COMMUNICATION QUANTIQUE UTILISANT UNE CORRECTION DE PHASE DES PHOTONS

Absstract of: FR3170757A1

SYSTEME ET PROCEDE DE COMMUNICATION QUANTIQUE UTILISANT UNE CORRECTION DE PHASE DES PHOTONS Il est proposé un système (1) de communication quantique comprenant : un émetteur (10) de deux signaux multiplexés (Sn) comprenant chacun un signal optique de référence (Rn) et un signal quantique (Qn), les deux signaux quantiques étant intriqués,deux récepteurs (30-n) des signaux multiplexés comprenant :un interféromètre (320) comprenant deux chemins optiques (322-i1, 322-i2) divisant le signal multiplexé reçu en deux composantes (Si-1n, Si-2n) et un modulateur (321) agencé sur un des chemins configuré pour appliquer une modulation de phase (n) à une des composantes,un module de traitement (340) effectuant les mesures interférométriques de signaux quantique et de référence interférométriques (SQfn, SRfn) issus de l’interféromètre, et déterminant la modulation de phase à partir de la mesure du signal de référence interférométrique. Chaque récepteur est configuré pour déterminer une clé quantique partagée entre les deux récepteurs, à partir de la mesure du signal quantique interférométrique. Figure pour l'abrégé : Fig.1

一种基于Bell态的可控认证量子对话方法

Absstract of: CN122293320A

本发明公开了一种基于Bell态的可控认证量子对话方法，第三方量子对话控制者C、量子通信者A和量子通信者B两两共享身份认证信息。第三方量子对话控制者C制备Bell态序列和2个验证身份的Bell态序列，接着将Bell态序列拆成单粒子序列，将部分粒子序列分别发送给量子通信者A和量子通信者B。第三方量子对话控制者C分别验证量子通信者A和量子通信者B的身份信息，量子通信者A和量子通信者B验证对方的身份信息。量子通信者A和量子通信者B分别用将要发送的消息对通信粒子执行酉操作，量子通信者A和量子通信者B根据Bell酉操作后的Bell态的测量结果推出对方发送的消息。在实现半可信的第三方量子对话控制者C控制下，量子通信者A和量子通信者B的双向安全、高效通信的同时，解决三方身份认证问题。本发明方法简单易行，具有良好的实际可执行性。

连续变量量子密钥分发的安全分布式数据处理系统及方法

Absstract of: CN122293665A

本发明提供了一种连续变量量子密钥分发的安全分布式数据处理系统及方法，系统包括主数据处理计算单元和至少一个副数据处理计算单元；所述主数据处理计算单元用于周期性监测量子链路状态以及副数据处理计算单元的状态信息，并动态分配数据处理任务至各副数据处理计算单元；所述副数据处理计算单元用于执行数据处理，并将处理结果回传至主数据处理计算单元。本发明根据数据处理任务的表观信噪比与归一化总噪声特征进行差异化场景区分处理，将高复杂度任务分配至高算力副数据处理计算单元、低复杂度任务分配至低算力副数据处理计算单元，充分利用多计算单元计算资源，提高数据处理效率。

양자 통신 시스템에서 신호를 송수신하기 위한 장치 및 방법

Absstract of: WO2025100599A1

In the present disclosure, an operating method of a first device in a quantum communication system may comprise the steps of: receiving an initial photon sequence including a plurality of sample photons from a second device through a quantum channel; performing a first stability check on the basis of at least one of the plurality of sample photons; determining a first division sequence and a second division sequence in which a first message is encoded, on the basis of the initial photon sequence; transmitting the second division sequence to the second device through the quantum channel; performing a second stability check on the basis of at least one of the plurality of sample photons included in the second division sequence; and receiving, from the second device, a signal in which a second message is encoded.

一种量子态传输方法、装置及量子计算机

Absstract of: CN122293208A

本发明涉及量子计算机技术领域，具体涉及一种量子态传输方法、装置及量子计算机，本申请通过将目标传输比特和相关联的关联全局门作为选定全局门的传输队列参数实现全局门的合并传输，可降低量子态传输次数，有效提升分布式的量子线路的计算效率；其次，当选定全局门为已被确定的关联全局门时，则按照量子线路执行时序选择量子线路中的已被确定的关联全局门下一执行时序的全局门作为选定全局门，通过剔除已被确定的关联全局门的方式避免寻找合并传输的全局门的重复计算，降低计算结果数据量，从而降低数据占用的存储空间。

一种用于经典-量子混合通信系统的动态资源调度方法及装置

Absstract of: CN122293319A

本发明公开了一种用于经典‑量子混合通信系统的动态资源调度方法及装置。涉及量子通信技术领域，其方法包括以下步骤：S1、实时获取所述经典‑量子混合通信系统的系统状态信息；S2、基于所述系统状态信息与预设的调度策略，动态生成下一时间片的信道资源分配方案；S3、将所述信道资源分配方案下发至经典信号发送机与量子信号发送机，以控制二者的信号传输工作，实现经典通信与量子密钥分发的信道资源动态协同调度。装置包括：状态监测模块、调度决策模块和指令执行模块，本发明所述方法可在现有通信设备基础上通过软件升级或增加控制模块实现，为传统通信网络向未来量子通信网络的平滑演进提供了可行的技术路径。

一种量子态传输方法、装置及量子计算机

Absstract of: CN122293209A

本发明涉及量子计算机技术领域，具体涉及一种量子态传输方法、装置及量子计算机，本申请通过将量子线路切割问题转化为二次无约束二进制优化模型的求解，寻找到最小化需要传输的全局门数量和传输成本，并基于最小化需要传输的全局门数量和传输成本对量子线路切割，并基于选定的量子比特作为传输比特进行量子态传递，降低分布式量子线路内量子通信的频率和通信成本，提升分布式的量子线路的计算效率。

コヒーレント光通信システムにおけるパイロットトーン支援復調のための装置および方法

Absstract of: WO2024261360A1

Pilot-tone-assisted demodulation procedure for coherent optical communication systems, specifically continuous-variable quantum key distribution (CV-QKD) systems, which allows compensation of random phase fluctuations in the lasers they use after acquiring the signal, solving the frequency-locking problem in a simple, efficient, and cost-effective manner.

A METHOD FOR REAL-TIME STATE-VALIDATION OF ENTANGLEMENT IN AN EXTENDIBLE QUANTUM NETWORK

Nº publicación: WO2026135455A1 25/06/2026

Applicant:

UNIV DELFT TECH [NL]
TECHNISCHE UNIVERSITEIT DELFT