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METHOD AND SYSTEM FOR QUANTUM KEY DISTRIBUTION

Resumen de: EP4838833A1

A method for quantum key distribution is provided in a system which comprises a first data processing device (10a) and a second data processing device (10b). the method comprises: transmitting a first optical pulse (12) via an optical quantum channel (11) from the first data processing device (10a) to the second data processing device (10b); transmitting second optical pulses (14) from the first data processing device (10a) to the second data processing device (1ob) via the optical quantum channel (11) and subsequent to transmitting the first optical pulse (12), wherein the second optical pulses (14) comprise information for quantum key distribution and wherein an intensity of the first optical pulse (12) is greater than intensities of the second optical pulses (14); and receiving backscattered radiation (15) which is backscattered from the first optical pulse (12) during propagation of the first optical pulse (12) through the optical quantum channel (11). The optical quantum channel (11) further comprises a restricted access section (31) adjacent to the second data processing device (10b), the restricted access section (31) having a path length being at least half of a path distance between the first optical pulse (12) and a last of the second optical pulses (14).

PROCESSING SIGNALS ASSOCIATED WITH A QUANTUM COMPUTING SYSTEM

Resumen de: EP4838425A1

0001 Methods and systems for processing signals associated with a quantum computing system are described wherein the quantum computing system is controlled by at least a control module comprising a plurality of data processing channels, each data processing channel being controlled by a sequence processor and including a timetag logic block, a timetag processing logic block, a pulse processing logic block and state computation logic block, wherein the method includes: timetagging, by a first timetag logic block in a first data processing channel, one or more pulses of a first thresholded analog signal received at a first input terminal of the first data processing channel, to form a first timetag signal comprising one or more first timetags representing one or more first events associated with a first detector of the quantum computing system; determining, by a first timetag processing logic block, one or more timetags in the timetag signal that occur within the first time window and a first timetag count value based on the one or more determined timetags; and/or, determining, by a first pulse processing logic block, one or more pulses in the thresholded analog signal that occur within the first time window and a first pulse count value based on the one or more determined pulses; and, determining, by a first state computation logic block, first state information associated with the quantum computing system based the first timetag and/or pulse count value and based at least

基于量子效应的确定性符号生成及检测装置

Resumen de: CN123066032A

本申请涉及基于量子效应的确定性符号生成及检测装置。本发明针对现有数值型量子机器学习方案在符号处理任务上延迟高、错误率难以下降、且单光子层符号生成能力不足的问题，提供基于量子点单光子源与里德伯原子电磁感应透明光谱(非数值量子计算,区别于量子机器学习)的符号生成及检测装置及方法，属量子物理层符号处理领域。本发明通过量子点单光子源(>90% g²(0)<0.1)与里德伯原子EIT级联实现单光子级确定性符号生成与检测，适用于需要单光子级确定性符号生成与检测的量子通信、量子密钥分发、量子安全认证场景。

一种耦合参数可调的多通道辛对称微波网络系统及其调控方法

Resumen de: CN123074603A

本发明提供一种耦合参数可调的多通道辛对称微波网络系统及其调控方法，属于微波网络与量子混沌实验模拟技术领域。该系统包括节点和内部拓扑一一对应且非互易传播方向相反的第一、第二微波子网络，两个子网络之间设置至少两组成对耦合支路，每组两条支路按节点交叉对应关系连接，每条支路串接相位调节单元和幅度调节单元；多个外部散射通道连接测量模块；吸收调节单元独立设置于不承担耦合功能的内部支路。本发明实现了内部耦合、外部开放与网络吸收的独立调节，并可通过闭环反馈自动补偿多支路幅相误差和支路间串扰，提高了系统辛对称状态的调节效率和可复现性。

一种量子密钥分发网络的路由方法及装置

Resumen de: CN123075303A

本申请涉及一种量子密钥分发网络的路由方法及装置，涉及量子通信技术领域，该方法包括：获取量子密钥分发网络中各量子链路的传输性能参数和安全风险参数；基于传输性能参数和安全风险参数构建链路评价权重；执行安全约束检查以识别并隔离不满足预设条件的异常链路，得到更新后的网络拓扑；基于链路评价权重和更新后的网络拓扑执行路径搜索，确定量子密钥分发路径。本申请可以实现对量子链路安全风险与传输性能的双重感知，主动隔离异常链路并动态优化路由路径，提升量子密钥分发网络在复杂环境下的安全性、可靠性及异构设备兼容性。

一种基于量子真随机数的无人机通信方法、装置、设备及介质

Resumen de: CN123074707A

本申请提供一种基于量子真随机数的无人机通信方法、装置、设备及介质，用于无人机通信技术领域，包括：基于量子物理源输出的量子随机信号，确定目标量子真随机数；对目标量子真随机数进行跳频序列映射，得到子频段切换序列；基于环境参数，对子频段切换序列进行优化，得到目标跳频序列；将目标信号调制到目标跳频序列对应的频率上，得到目标加密信号并发射至地面终端，以使地面终端对目标加密信号进行解密，得到目标信号；如此，提高了无人机通信的安全性和抗干扰性。

一种基于投影几何调控的拓扑编码量子隐形传态方法及其系统

Resumen de: CN123055192A

本发明公开了一种基于投影几何调控的拓扑编码量子隐形传态方法及其系统。所述方法通过投影几何调控模块调控拓扑光子晶体器件的投影角θ（θ=arctan(β_s/β_r)，β_r²+β_s²=1），将待传输量子态编码为拓扑不变量T(θ)=T_max·sin(θ‑θ0)；编码后的拓扑态在拓扑陈数保护下完成贝尔态测量和经典信息传输；接收端通过投影角同步和逆投影映射将拓扑态解码为原始量子态。投影几何调控模块持续监测投影角变化率，根据拓扑稳定性判据γ²≥|1−k||∂C/∂θ|||·h/2实时保障拓扑编码态的稳定性。本发明首次将投影几何调控与拓扑编码量子隐形传态系统整合，实现了可动态调控的拓扑保护量子隐形传态，可应用于量子通信网络和量子互联网等场景。

一种宏观量子态传输的拓扑保护保真度验证系统及其验证方法

Resumen de: CN123050667A

本发明公开了一种宏观量子态传输的拓扑保护保真度验证系统及其验证方法。所述系统包括投影角测量模块（实时测量发送端投影角和接收端投影角）、纤维相位差测量模块（测量）、拓扑保护带宽标定模块（标定）、粒子数输入模块（输入总粒子数）、保真度计算模块（根据公式实时计算保真度）、保真度阈值判断模块、Berry曲率测量模块（独立验证）和验证结果输出模块。当时系统自动分解保真度为和并诊断损失来源；当且时判定验证通过。本发明实现了宏观量子态传输保真度的实时无损验证，适用于从单粒子到摩尔级物质的全范围应用场景。

一种面向动态信道环境的QKD参数自适应优化方法及系统

Resumen de: CN123055291A

本发明涉及量子技术领域，公开了一种面向动态信道环境的QKD参数自适应优化方法及系统。综合历史运行数据、误码率变化趋势及链路状态信息，对下一轮运行状态进行预测，并在满足安全约束的条件下联合优化多个运行参数，实现密钥率、安全性及运行稳定性的协调优化。与现有技术相比，本发明能够根据链路运行状态动态调整基底选择概率、信号态强度、诱骗态参数、纠错参数及隐私放大参数，适用于存在信道损耗变化、环境扰动、探测噪声波动或运行状态动态变化的量子密钥分发系统，也可作为量子通信设备运行参数自适应管理和优化控制的技术方案，为量子通信网络的长期稳定运行提供参数优化支持。

一种基于宏观量子态传输的量子网络节点系统及其组网方法

Resumen de: CN123055581A

本发明公开了一种基于宏观量子态传输的量子网络节点系统及其组网方法。所述系统包括多个量子网络节点（各节点包含具有非零拓扑陈数的拓扑核心元件）、节点间拓扑连通链路（连通条件为）、节点同步控制系统、量子态路由模块、链路保真度验证模块和网络管理模块。节点间传输时，相邻节点的投影角同步调制至临界值，，固有时冻结实现瞬时传输。系统支持星型、网状、环形、分级和动态五种组网拓扑结构，通过链路保真度实时监测和自动重路由实现网络故障自愈。本发明实现了基于拓扑保护的多节点宏观量子态瞬时传输组网，适用于量子互联网和星际通信网络等场景。

一种可编程集成光量子芯片及其控制方法

Resumen de: CN123055193A

本申请涉及光量子信息处理技术领域，公开了一种可编程集成光量子芯片及其控制方法，芯片包括通过片上波导依次连接的输入端口阵列、制备态网络、幺正演化网络、投影测量网络与输出端口阵列；输入端口阵列用于接入光信号；制备态网络用于生成目标高维初态；幺正演化网络用于对目标高维初态施加目标幺正矩阵以实现目标编码空间内的任意幺正演化；投影测量网络用于将演化后的高维量子态投影到目标测量基，并将目标测量基对应的多模式幅度和相位映射到输出端口阵列对应的输出端口。本申请在同一芯片上完成初态制备、幺正变化与投影测量，能够提高保真度，保持高维相干性，降低系统标定难度，提高任务切换效率，实现任意态、演化和投影测量的协同。

Resource-efficient coherent optical frequency transfer for distributed quantum computing and the quantum internet of things

Resumen de: US20260352345A1

A unified quantum network architecture is introduced that seamlessly applies to all memory types while sharply reducing experimental overhead. The scheme depends on the following elements: A unified quantum network framework based on photon heralding. As a unified quantum network framework, a scheme for optically heralded entanglement that applies to superconductor-to-optical interfaces equally as to other memory-photon interfaces (such as spin-photon interfaces, and others). To address the challenges noted above, a scheme termed “Universal Quantum Bus” (UQB) is introduced. UQB is described for connecting diamond color centers across a telecom fiber network, however the scheme works equally for all other memory types.

SYSTEM HAVING RECEIVER NODE AND SPACED APART RYDBERG SENSOR NODE THAT GENERATES A QUANTUM SECURE LASER OUTPUT AND ASSOCIATED METHODS

Resumen de: US20260352344A1

0000 A system includes a receiver node and a Rydberg sensor node in spaced apart relation from the receiver node and configured to generate a quantum secure laser output to the receiver node based upon a received radio frequency (RF) signal. The Rydberg sensor node may include a Rydberg sensor and a spread photon transmitter coupled thereto. The receiver node may include a laser detector and a spread photon receiver coupled thereto. The system may also include a coupling laser and a probe laser cooperating with the Rydberg sensor node.

ENTANGLEMENT DISTRIBUTION OVER TURBULENT FREE-SPACE OPTICAL LINKS USING ADAPTIVE OPTICS WAVEFRONT CORRECTIONS

Resumen de: US20260349312A1

0000 Entanglement is a unique quantum information processing (QIP) feature. Entanglement can be used to implement quantum sensors with improved sensitivity over classical sensors. Disclosed are systems and techniques for entanglement distribution over turbulent free-space optical (FSO) channels based on using adaptive optics. An apparatus can include a C-band tunable laser, amplifier, and periodically poled lithium niobate (PPLN) waveguide for generating entangled photon pairs. The entangled photon pairs are multiplexed with a classical laser beam and transmitted over a free-space optical (FSO) link. A reflected beam from an intermediate node, or a direct beam from a remote transmitter with line-of-sight, is received and provided to an adaptive optics (AO) system using the classical signal as a channel probe to determine a correction. The received beam is further reflected by a deformable mirror to apply the correction. The entangled photon pairs are demultiplexed from the received beam and provided to intended users.

METHOD FOR ENHANCING THE PRIVACY OF DELEGATED QUANTUM COMPUTATIONS, AND SYSTEM FOR IMPLEMENTING SUCH METHOD

Resumen de: US20260350212A1

The invention concerns a method for enhancing the privacy of delegated quantum computations, involving: a client (A) whose aim is to solve a computational problem based on sensitive data and/or using a sensitive algorithm, and a cloud computing service provider (B) who has quantum computing capacities superior to the client (A) and is therefore capable of solving the problem and/or running the client's desired algorithm; wherein the method comprises a sequence including the following steps: a) a light emitter (10) controlled by the client (A) emits at least one pulse (11) having a specific quantum state (S1), b) a quantum emitter (20) controlled by the provider (B) receives the pulse (11), c) the quantum emitter (20) emits a single photon (21) supporting a photonic qubit (Q2), with a relationship being defined between the quantum state (S1) of the pulse (11) and the photonic qubit (Q2). The invention also concerns a system for implementing this method.

RECEPTION APPARATUS, QUANTUM KEY DISTRIBUTION SYSTEM, AND METHOD FOR RECEIVING QUANTUM SIGNAL

Resumen de: US20260352339A1

An object of the present disclosure is to prevent an eavesdropping attack on quantum key distribution. An optical intensity modulator performs intensity modulation on an incident quantum signal. A photon detection apparatus detects photons of the quantum signal modulated by the optical intensity modulation unit by any of a plurality of detectors. A controller controls the intensity modulation of the quantum signal in the optical intensity modulation unit in such a way that the quantum signal is incident on the plurality of detectors in a period in which variation in detection efficiency of the quantum signal in the plurality of detectors is within a predetermined range.

METHOD AND SYSTEM FOR ONGOING POLARIZATION FEEDBACK AND CONTROL DURING QUANTUM KEY DISTRIBUTION USING DATA ANALYSIS

Resumen de: US20260352449A1

0000 A quantum communication system and associated methods are described for securely establishing a cryptographic key between multiple transmitters and a receiver. Each transmitter emits qubit signals from a light source within defined time windows, characterized by specific bases and modes controlled by a transmitter controller. The receiver utilizes an interference device with multiple inputs to receive qubit signals and outputs to generate an interference signal, which is detected by multiple detectors. A receiver controller sends information on detected outputs to transmitters and provides feedback based on polarization characteristics. Simultaneously, the system adjusts subsequent qubit signal characteristics based on this polarization feedback, enabling the establishment of a cryptographic key between transmitters using the detected signals. This adjustment optimizes the cryptographic key rate, enhancing security and efficiency in quantum communication protocols.

MULTI-WAY FUSION CIRCUITS FOR PHOTONIC QUBITS

Resumen de: WO2025212141A2

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.

SYSTEM AND METHOD FOR LONG-DISTANCE QUANTUM-CAPABLE INTERNET

Resumen de: CN122603481A

A quantum-enabled Internet (QEI) includes a quantum-enabled networking architecture that integrates advanced communication systems with long-distance quantum communication hardware and methods of operation thereof. Using a quantum network (QN) design paradigm, a quantum network paradigm with a physical center-based stack is provided to control dynamics of multiple optical substance Hamiltonian across remote nodes. This QN network facilitates a substantially long-distance quantum network service-high visibility Floohm-Mander interference of telecommunications quantum states generated in two separate, telecommunications compatible quantum light-material interfaces, which are spaced apart by a distance. The QN paradigm design can be applied to demonstrate scalable long-distance QN services in a QN infrastructure, including transmission of polarization entanglement generated by a highly repeated source of entangled photons and storage of telecommunications polarization entanglement using a remotely located quantum memory, the quantum memory can predict storage of entanglement using non-destructive measurement and quantum state tomography.

METHOD AND SYSTEM FOR ALTERING A NONCLASSICAL STATE OF ELECTROMAGNETIC RADIATION

Resumen de: EP4578823A1

0001 There is presented a method for altering a nonclassical state of EM radiation. A first matter particle is held within a first trap. A second matter particles is held within a second trap. The first and second traps being spatially separated. A nonclassical state of EM radiation is input to the plurality of matter particles with a first photon number distribution. The photon number distribution of the input nonclassical state of EM radiation is altered by interacting the input nonclassical state of EM radiation with the plurality of matter particles. The first matter particle is excited to a Rydberg state using a photon from the input nonclassical state of EM radiation. This excitation prevents an excitation, to a Rydberg state, of the second matter particle. The resulting altered nonclassical state comprises a second photon number distribution different to the first photon number distribution.

受信装置、量子鍵配送システム及び量子信号の受信方法

Resumen de: JP2026175766A

0001 【課題】量子鍵配送への盗聴攻撃を防止する。 【解決手段】光強度変調手段は、入射する量子信号を強度変調する。光子検出手段は、前記光強度変調手段から受け取った前記量子信号の光子を複数の検出器のいずれかによって検出する。制御手段は、前記複数の検出器における前記量子信号の検出効率のばらつきが所定の範囲内となる期間に前記複数の検出器に前記量子信号が入射するように、前記光強度変調手段における前記量子信号の強度変調を制御する。 【選択図】図４

量子密钥分发网络修复动作执行方法、装置及电子设备

Resumen de: CN123034946A

本申请涉及量子保密通信网络运维控制技术领域，公开了一种量子密钥分发网络修复动作执行方法、装置及电子设备。本申请中，该方法包括：获取候选修复动作，候选修复动作包括用于下发至量子密钥分发网络的统一控制意图；获取候选修复动作执行前的量子物理量，量子物理量至少包括所涉链路的量子比特误码率、密钥池水位，以及多强度态的计数量；基于量子比特误码率和密钥池水位，对统一控制意图执行密钥储备校验，以及，基于多强度态的计数量，对统一控制意图执行诱骗态安全域校验；在密钥储备校验和诱骗态安全域校验均通过的情况下，以事务方式下发统一控制意图。通过上述方法，实现量子密钥分发网络的自动运维。

一种基于地址阵列偏移量编码的宏观量子态隐形传态保真度增强方法及其系统

Resumen de: CN123034898A

本发明公开了一种基于地址阵列偏移量编码的宏观量子态隐形传态保真度增强方法及其系统。所述方法在发送端将宏观量子态编码为等腰梯形地址阵列中的地址对，相位由地址对相对于中心对称轴的偏移量表示；在传输过程中持续读取地址对位置，当偏移量超出容限时执行相位锁定，将地址对拉回初始位置；在接收端读取地址对位置，根据偏移量重建相位、根据层位置重建幅值；通过搜索最近合法层补偿残余相位漂移。本发明实现了宏观量子态隐形传态过程中相位的主动保全和保真度增强，适用于量子中继网络、分布式量子计算、长距离量子通信等场景。

一种空域可重构偏振感知交互系统及其识别方法

Resumen de: CN123019863A

本发明公开了一种空域可重构偏振感知交互系统及其识别方法，属于圆偏振光子感知与机器视觉协同应用技术领域。系统包括空间可编程圆偏振光场编码芯片、无人机平台、通信与协同控制单元、地面光子信标识别终端及光子编码解析单元。芯片包含左旋、右旋圆偏振发光像元区域及非手性参考区域。地面终端通过双通道采集左旋与右旋偏振图像，解析单元以非手性参考区域为基准进行双通道亮度融合计算，构建结构化手性光场特征图谱，实现芯片识别与空间定位。本发明构建了“空中旋向信号发射—地面偏振接收—智能解析反馈”的全闭环感知链路，利用圆偏振信号旋向正交特性进行背景抑制与特征增强，在复杂光学环境下提高了目标识别精度。

一种拓扑保护的量子隐形传态全链路工程方法及其系统

Nº publicación: CN123019890A 30/10/2026

Solicitante:

王颂斌

Resumen de: CN123019890A

本发明公开了一种拓扑保护的量子隐形传态全链路工程方法及其系统。所述方法包括：以复投影权重对数为物理正则化约束项筛选拓扑材料；根据拓扑相图公式确定器件最优结构参数并制造拓扑保护器件；根据稳定性判据实时监测并维持系统稳定性；在拓扑保护条件下执行量子隐形传态；以拓扑保护带宽为统一标定基准进行闭环反馈控制。本发明首次将拓扑材料筛选、拓扑保护器件制造、拓扑稳定性控制和量子隐形传态协议执行整合为统一的技术链条，实现了从理论设计到工程实施的全链路闭环控制。