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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.

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.

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.

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.

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.

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

Resumen de: GB2705297A

A photon source for use in a quantum communication system, comprising: a first layer comprising an elliptical central mesa 202 surrounded by a first elliptical ring 203, the first elliptical ring 203 defining an optical cavity supporting a plurality of modes, the first elliptical ring 203 and the elliptical central mesa 202 separated by a region of relatively reduced refractive index; a solid-state quantum emitter (e.g. a quantum dot) positioned within the elliptical central mesa 202; and a magnetic field source configured to generate a magnetic field at the elliptical central mesa 202 that is oriented within a plane of the first layer, such that a transition of the solid-state quantum emitter that is resonant with a mode of the cavity is split into components by the magnetic field; such that components of the transition having a polarisation matching a polarisation of the cavity mode are enhanced. Fig. 2C

对量子密钥分发系统进行多普勒频移补偿的系统及方法

Resumen de: CN122870401A

本发明提供了一种对量子密钥分发系统进行多普勒频移补偿的系统及方法，可以应用于量子通信技术领域。该系统包括：生成调制子模块根据目标强度调制信号，对激光信号进行强度态调制，得到初始光信号；分束调制子模块对初始光信号进行分束和调制处理，得到并进行干涉处理，得到并输出量子光信号；光束分束子模块对量子光信号进行被动基矢分束处理，得到待调制相位基光信号；相位补偿子模块根据单光子探测子模块所探测得到的在上一窗口的第一相位基干涉光信号和第二相位基干涉光信号内的光子数，确定迭代干涉补偿相位；根据迭代干涉补偿相位，对待调制相位基光信号进行相位补偿，得到当前窗口的第一相位基干涉光信号和第二相位基干涉光信号。

抗相干攻击的单侧设备无关量子密钥分发方法和系统

Resumen de: CN122870391A

本发明公开了一种抗相干攻击的单侧设备无关量子密钥分发方法和系统，抗相干攻击的单侧设备无关量子密钥分发方法包括：不可信源制备并分发量子态；第一通信方和第二通信方对接收到的量子态进行测量；第一通信方记录第一测量结果和探测标志；第二通信方记录第二测量结果；第一通信方公开探测标志，第一通信方和第二通信方共同丢弃所有无效轮次；将有效轮次数据随机划分为参数估计集和密钥生成集；公开参数估计集中的数据，统计计算得到关联概率分布；计算安全密钥率下界，若安全密钥率下界为正，则对密钥生成集执行纠错和隐私放大操作，生成共享密钥。本发明的方法能够降低非信任方的检测效率阈值，降低了非信任方设备的硬件成本和制造难度。

基于弱测量的主动低干扰量子链路探测方法及系统

Resumen de: CN122870269A

本申请涉及量子通信与量子网络技术领域，特别是涉及一种基于弱测量的主动低干扰量子链路探测方法及系统。所述方法包括：初始化目标保真度阈值、置信水平、单贝尔对最大测量次数、初始耦合强度等参数，设置初始待探测贝尔对数量为1，初始化保真度的先验概率分布，生成对应数量的共享贝尔对；对每个贝尔对随机选择泡利可观测量并执行序贯弱测量，记录连续高斯指针结果，通过贝叶斯后验更新逐步聚合保真度信息；当后验置信度达到预设阈值时做出接受/拒绝/不确定的三元决策。采用本方法能够以弱测量替代传统破坏性投影测量，使被测纠缠对在诊断后仍可复用于后续量子通信任务，显著提升量子网络的整体资源利用效率。

用于分集接收光通信的偏振复用快速相干合并集成光芯片

Resumen de: CN122870289A

本发明的用于分集接收光通信的偏振复用快速相干合并集成光芯片，解决了传统分集接收需要多个接收机，系统复杂、时延大的问题，属于设计光通信和集成光芯片领域。本发明在模式分集接收的基础上，利用可调集成光子芯片对自由空间光通信发射的偏振复用光信号进行接收，并通过MZI对接收到的不同偏振光进行独立的相干合并。为了实现更快速的合并速率，本发明通过第一级MZI的强度相位信息反演得到入射光波前信息，然后将其发送到后面多级MZI中，提前进行控制，提升芯片的合并速率。最后将合并后的两束正交偏振光发送到片上集成的相干接收机，进行信号处理，实现片上分集相干通信接收功能。

一种基于投影几何调控的拓扑保护量子中继器芯片及其控制方法

Resumen de: CN122870292A

本发明公开了一种基于投影几何调控的拓扑保护量子中继器芯片及其控制方法。所述芯片包括SOI衬底、拓扑光子晶体量子存储器阵列（各微腔单元具有非零拓扑陈数）、投影几何调控模块、量子态输入/输出接口、纠缠交换单元和中继控制单元。投影几何调控模块通过外部场独立调控各微腔单元的投影角θ（θ=arctan(β_s/β_r)，β_r²+β_s²=1），实现量子态的写入、拓扑保护存储和读取；纠缠交换单元对存储的量子态执行贝尔态测量和纠缠交换；中继控制单元协调量子态的接收、存储、纠缠交换和转发时序。本发明实现了芯片级量子中继器，具有拓扑保护存储、高保真度纠缠交换、多通道并行的突出优点，存储时间≥100ms，纠缠交换保真度≥0.93，可应用于量子通信网络和量子互联网等场景。

ELECTRICAL INTERCONNECTS FOR PACKAGES CONTAINING PHOTONIC INTEGRATED CIRCUITS

Resumen de: US20260305479A1

0000 A semiconductor chip includes: a photonic integrated circuit (PIC) comprising an active component electrically connected to a first landing pad at a surface of the PIC, wherein the first landing pad is configured to receive a copper pillar, which, when installed, provides at least a portion of a first electrical interconnect between the active photonic component and a second integrated circuit to be stacked on the surface of the PIC, and wherein, when viewed from above the PIC towards the PIC, a center of the active photonic component on the PIC is offset from a nearest edge of the first landing pad by about a distance less than 10 mm.

OPTICAL DEVICE FOR PERFORMING MATRIX-VECTOR MULTIPLICATION

Resumen de: WO2026202896A1

Basic block, for use in photonic processor, is presented, comprising an optical device having N (N≥1) waveguide structures between device's input and output ports. Each i-th waveguide structure defines M light guiding units (M≥2), each comprising active medium, excitable by a respective control light signal to affect intensity of j -th light signal, passing through j -th light guiding unit, with a weighting factor defined by power of the control light signal. This provides NxM weighted light signals at NxM output ports of the TV waveguide structures. The device's input port has TV splitters producing AV light signals, each of power Xy indicative of i-th component of vector X=X1,...,XN to be multiplied by matrix or vector of size NxM. The output port has a number of combiners providing output light signal of power Y j indicative of j -th component of vector Y=Y1,...Y M , presenting a matrix-vector or vector-vector multiplication of the input light signal.

Telecom-Photon Insensitive Superconducting Qubit to Transducer Module

Resumen de: US20260303214A1

The present disclosure describes improved quantum systems, and processing thereof, that may comprise optimized transducer assembly configurations to enhance the conversion of quantum information between quantum processors and carriers for physical interactions. For ease of explanation, an exemplary transducer is a photon-insensitive transducer, but the present disclosure is not so limited. An exemplary photon-insensitive transducer module comprises a superconducting circuit, an optomechanical transducer, and a coupling circuit. The optomechanical transducer is arranged to mediate an exchange between telecom-wavelength optical modes and a microwave frequency mechanical mode. The coupling circuit is arranged to mediate coupling between the superconducting circuit and the optomechanical transducer. Each of the superconducting circuit, the optomechanical transducer, and the coupling circuit may be arranged and connected as independent modules. Each module may include one or more mitigating structures for protecting the superconducting circuit from carrier particle interaction.

CONTROL OF HYPERFINE INTERACTION IN BROKER-CLIENT SYSTEMS

Nº publicación: US20260300802A1 01/10/2026

Solicitante:

PHOTONIC INC [CA]
PHOTONIC INC.

Resumen de: US20260300802A1

Methods and systems for protecting a quantum state of a client quantum system of a broker-client system are disclosed. The client-broker system comprises the client quantum system and a broker quantum system coupled by a hyperfine interaction. The method comprises suppressing the hyperfine interaction by applying an electromagnetic dressing field to the client-broker system in the presence of a first magnetic field. The electromagnetic dressing field comprises a second magnetic field that oscillates in a direction perpendicular to the first magnetic field. While the hyperfine interaction is suppressed, a quantum state of the broker quantum system may be altered by steps including optically exciting the broker quantum system. The method may be applied to reduce decoherence of the quantum state of the client quantum system while resetting a quantum state of the broker quantum system.