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METHOD OF MEASURING SELF-KERR IN A PHYSICAL QUANTUM SYSTEM CONFIGURED TO HOST A BOSONIC CODE QUBIT

Resumen de: WO2026145962A1

A method of measuring self-Kerr in a physical quantum system configured to host a bosonic code qubit, comprises the following operations: 1) providing a physical quantum system configured to host a bosonic code qubit, said physical quantum system comprising (i) a quantum circuit comprising oscillators hosting a buffer or readout mode and a memory mode, and a non-linear element coupling the buffer or readout mode to the memory mode, and (ii) a control circuit configured to apply one or more control signals to the quantum circuit to stabilize the bosonic code qubit in the memory mode and further configured to receive measurement signals from at least the buffer or readout mode, 2) define a coherent state (α) for the memory mode, and, for each of a plurality of coherent state amplitudes and each of a plurality of durations (t), a. prepare, using the control circuit, said coherent state (α) in the memory having one of said plurality of coherent state amplitudes, b. wait for a period of time having one of said duration (t), c. apply, using the control circuit, one or more control signals to said quantum circuit such that the quantum circuit is in a resonant regime | i * ω a - ω b | = j * |ω cs | if said one or more control signals comprise an AC component having an angular frequency |ω cs | or | i * ω a - ω b | = 0 if said one or more control signals comprise only DC components, resulting in an interaction, mediated via said non-linear element, in said physical quantum s

METHOD FOR SOLVING MATRIX PROBLEMS, AND SYSTEM FOR IMPLEMENTING THIS METHOD

Resumen de: US20260195403A1

A method solves matrix problems and comprises an encoding step, wherein a matrix is transformed into a unitary matrix, by encoding the matrix with a unitary dilation theorem used as an encoding function; then an optical design step, wherein the unitary matrix is translated into a linear optical circuit, then an optical device is formed by the linear optical circuit, single-photon sources at input and single-photon detectors at output; then an analysis step, wherein the optical device is used for solving a problem related to the matrix, by analyzing the output state of the single-photon detectors. A system implements the method.

MEASUREMENT METHODS FOR A RESONANT CAT-QUBIT CIRCUIT

Resumen de: US20260195628A1

A non-linear superconducting quantum circuit having a first mode and a second mode is disclosed, wherein the first mode and the second mode have respective resonant frequencies. The circuit is configured such that the resonant frequency of the second mode is substantially 2N times the resonant frequency of the first mode when a predetermined current of a constant intensity is applied to the circuit. The circuit intrinsically performs a resonant 2N-to-1 photon exchange between respectively the first mode and the second mode, with N being a positive integer, thus improving the non-linear superconducting quantum circuit. When this circuit receives a predetermined current and when the second mode is driven appropriately, the circuit can stabilize a cat-qubit. In order to perform quantum measurements on this circuit, the drive of the second mode is turned off, thus switching to a no-drive manifold such that the quantum measurements can be performed.

TECHNIQUES FOR BASEBAND PULSE QUBIT CONTROL AND RELATED SYSTEMS AND METHODS

Resumen de: WO2026147506A1

Techniques are described for controlling qubits using baseband pulse sequences. Many, or even all, qubits in a system can be controlled by baseband pulse sequences that are synchronized to a clock signal shared by the qubits. The baseband pulse control techniques allow many qubits to be driven with the same parameterized baseband pulse sequence applied based on a common clock signal, with parameters of the baseband pulse sequence selected based on the desired operation. This approach greatly simplifies the electronics needed to drive a collection of qubits, as there is no need for picosecond timing, nor the complexities that arise from varied gate durations.

Real-time system adapted for communicating with quantum devices

Resumen de: GB2703019A

A messaging system in a real-time system adapted for communicating with a plurality of quantum devices 207a-207d (e.g. registers of qubits/qudits or coupling devices). The messaging system has one or more aggregator nodes 205, and a plurality of real-time units, communicatively coupled to the quantum devices, as respective leaf nodes 206a-206d. The messaging system is configured to notify a target node 204 of a status of each leaf node in a subset of the leaf nodes. Each aggregator node receives respective notifications from one or more of its child nodes, each notification indicating a status of one or more leaf nodes of the subset of the leaf nodes. Responsive to receipt of the respective notifications from the one or more of its child nodes the aggregator node generates an aggregated notification. The aggregator transmits the aggregated notification to a grandparent node of its child nodes. The grandparent node may be the target node, or it may be descendant of the target node. The messaging system may further be configured to transmit, for concurrent receipt, a message from the target node to each of the leaf nodes in the subset of leaf nodes. Figure 2

PARAMETRIC DEVICE HAVING JOSEPHSON JUNCTION ARRAYS

Resumen de: WO2026106593A1

Parametric devices for use in, for instance, quantum computing systems are provided. In one implementation, the parametric device includes a bridge circuit coupled between a first resonator and a second resonator. The bridge circuit includes a plurality of Josephson junction arrays. The parametric device includes a DC flux bias coupled to the bridge circuit through the first resonator. The parametric device includes an AC pump bias coupled to the bridge circuit through the second resonator. A first circuit can be coupled to the bridge circuit through the first resonator. The first circuit can be associated with a first frequency. A second circuit can be coupled to the bridge circuit through the second resonator. The second circuit can be associated with a second frequency. The second frequency can be different than the first frequency.

METHOD AND SYSTEM FOR PHOTONIC ERROR MITIGATION USING PARTITIONS

Resumen de: EP4773048A1

The present invention relates to a method 100 and system for error mitigation in photonic quantum information processing. The method 100 involves generating 111 partially distinguishable photons, measuring 121 at least one computation result R(p) that is dependent on at least one probability distribution p produced by N partially distinguishable photons, uniquely labeling and partitioning the photons, estimating probability distributions of cells within chosen partitions, and combining 131 these distributions to construct a new approximation of the noise-impacted distribution. The error-mitigated distribution is then computed by subtracting the approximated distribution from the original one.

QUANTUM DEVICE AND METHOD OF MANUFACTURING QUANTUM DEVICE

Resumen de: EP4773790A1

A quantum device (100) includes a quantum chip (10) including a substrate (11) having a first surface (12) and a second surface (13), a quantum bit (15) provided on the first surface, and an electrode (18) electrically connected to the quantum bit and provided on the second surface, a mounting portion (30) having a mounting surface (32) on which a peripheral edge portion of the quantum chip is mounted, the mounting portion having a linear expansion coefficient different from that of the substrate, a conductor pin (40) having a tip end in contact with the electrode, and a holding portion (50) fixed to the mounting portion, the holding portion holding the conductor pin and having a linear expansion coefficient different from that of the substrate, wherein the electrode has a shape having a longitudinal direction in a direction radially extending from a center of the substrate in plan view, and the quantum chip is mounted on the mounting surface by inserting a protrusion (31) provided on one of the substrate and the mounting surface into a hole (19) provided on another of the substrate and the mounting surface, the hole having a longitudinal direction in a direction extending radially in plan view.

INFORMATION PROCESSING PROGRAM, INFORMATION PROCESSING METHOD, AND INFORMATION PROCESSING DEVICE

Resumen de: EP4773047A1

An information processing program for causing a computer to execute a process, the process includes: obtaining a decomposition number of a Trotter decomposition approximating a quantum unitary corresponding to an Ising model; and setting a quantum circuit expressing a formula of the Trotter decomposition by one or more first partial circuits and a second partial circuit, the one or more first partial circuits being of a first count one less than the obtained decomposition number and each including an Rz gate that represents a rotation action about a Z-axis on a qubit, the second partial circuit being free of the Rz gate and coupled to a rear of the one or more first partial circuits.

Method and system for tuning the resistance of a josephson junction

Resumen de: GB2703030A

A system for tuning the resistance of a Josephson Junction (JJ) (Fig. 2: Rjj) comprises a source of tuning voltage (Fig. 2: 11) and a measurement unit, the source being configured to apply the tuning voltage which is an alternating voltage across the JJ (Fig. 2: 13) to allow the JJ to reach a target resistance and the measurement unit configured to measure the resistance of the JJ using the tuning voltage. The voltage source may be a lock-in amplifier and source measure unit (SMU). The source voltage may be applied by across the JJ (Fig. 2: 13) and a resistive load (Fig. 2: 19) and the resistance of the JJ is determined by measuring the potential drop across the load resistor. The temperature of the JJ may be controlled. A smaller probe voltage Vp may be used to probe the resistance of the JJ and a larger tuning voltage Vt is used to induce junction tuning. In an initial calibration stage the junction resistance may be measured at room temperature using both Vp 31 and Vt 33 after which the temperature is increased to 80℃ and the resistance is measured using Vp 39 before switching to Vt 41 to tune the JJ to a target resistance. The JJ may then be cooled 45 to room temperature and the final resistance measured at Vp. The resistance may continue to increase after the tuning voltage has been removed so a time delay may be inserted after the end of the application of the tuning voltage. After the resistance has been tuned, the JJ is cooled to cryogenic temperatures, retaining th

QUANTUM COMPUTER ON THE BASIS OF PARAMAGNETIC CENTRES

Resumen de: WO2025045701A1

The invention relates to a quantum computer, which comprises a sample (21) with paramagnetic centres, preferably in the form of NV centres (22), and a pumping radiation source (1). The pumping radiation source (1) irradiates, by means of an optical system, the paramagnetic centres and/or NV centres (22) with pumping radiation (54) of a pumping radiation wavelength (λpmp) over a first optical partial path. The optical system detects the fluorescent radiation (33) of the paramagnetic centres (22) and guides the fluorescent radiation (33) to a photodetector (50) and/or a single-photon detector (50) over a second optical partial path. The first optical partial path differs from the second optical partial path at least in some portions. The photodetector (50) and/or the single-photon detector (50) convert the fluorescent signal of the fluorescent radiation (33) of the paramagnetic centres (22) into at least one measurement signal and/or at least one measurement value. The quantum computer uses this at least one measurement signal and/or this at least one measurement value to carry out a quantum operation. The device is characterised in that the quantum computer has an optical spatial filter in the second optical partial path.

CALCULATION CONTROL FOR HYBRID COMPUTING OF HAMILTONIAN EIGENSOLUTIONS

Resumen de: US2025077930A1

Calculation control for hybrid computing of Hamiltonian eigensolutions may be provided by selecting K basis states from an ansatz space of a chemical system, wherein the ansatz space is generated by a quantum computer system and includes fewer basis states than a whole basis space for the chemical system, wherein the K basis states are selected according to a selection protocol to define a core space for the chemical system; computing, via an eigensolver provided by a classical computer system, an eigensolution for the chemical system from the core space; and outputting the eigensolution for the chemical system.

CLIFFORD UNITARY SYNTHESIS VIA GENERALIZED S AND CZ GATES

Resumen de: US2025077921A1

0000 Aspects of the disclosure include decomposing a matrix for a Clifford unitary into a product of first and second involution matrices, determining first symplectic matrix that transforms first involution matrix into a first matrix, a first Clifford unitary matrix being described by first symplectic matrix, and determining second symplectic matrix that transforms second involution matrix into second matrix, a second Clifford unitary matrix being described by second symplectic matrix. Aspects include, responsive to first matrix being a diagonal matrix, setting a second number to size of first matrix and setting a second sequence to include the second number of generalized S gates, and responsive to second matrix being a diagonal matrix, setting a first number to size of second matrix and setting a first sequence to include the first number of generalized S gates. Aspects include executing first sequence, second sequence, and a Pauli unitary P on the quantum computer.

TUNING COUPLING STRENGTH BETWEEN CONTROL LINES AND QUANTUM CIRCUIT DEVICES IN SUPERCONDUCTING QUANTUM PROCESSORS

Resumen de: WO2025049996A1

In a general aspect, tuning the coupling strength between a qubit device and nearby control lines is described. In some implementations, a method includes identifying a design of first and second quantum processor wafers of a quantum processing system. The first quantum processor wafer includes a qubit device which includes two qubit electrodes and a SQUID loop. The second quantum processor wafer includes a control line which is configured to apply control signals to the qubit device and includes first and second control ports, a circuit loop inductively coupled to the SQUID loop, and conductive traces connected between the circuit loop and the respective first and second control ports. The control lines are capacitively coupled to the two qubit electrodes. The method includes obtaining simulation data and experimental data from measurements of the quantum processing system, and modifying the design based on the simulation data and the experimental data.

HELICAL FIBER GEOMETRY FOR CONTINUOUS HIGHER-ORDER MODE STRIPPING IN BEAM DELIVERY FIBERS

Resumen de: US2025079034A1

Example embodiments provide quantum computers, laser light delivery systems for quantum computers, and methods for delivering laser light from lasers of quantum computers to atomic object confinement apparatuses of quantum computers. In an example embodiment, a quantum computer comprises an atomic object confinement apparatus, a laser, a cylindrical guide positioned such that a first end of the cylindrical guide is adjacent the laser and a second end of the cylindrical guide is adjacent the atomic object confinement apparatus, and an optical fiber cable helically wrapped around the cylindrical guide and spanning from the first end to the second end. The optical fiber cable is configured to deliver laser light generated by the laser to the atomic object confinement apparatus. A pitch of the helically wrapped optical fiber cable is selected to provide a desired effective bend radius of the optical fiber cable to strip higher-order modes of the laser light.

QUANTUM ERROR CORRECTION

Resumen de: WO2025046517A1

The present disclosure describes a method that involves receiving a description of a logical quantum circuit to be executed on a quantum computing system, determining a property of the logical quantum circuit and selecting a quantum error correction code from two or more candidate QECCs based on the determined property of the logical quantum circuit, in which the two or more candidate QECCs are capable of implementing the logical quantum circuit as physical quantum circuits executable by the quantum computing system.

DETERMINING SPECIES ORDER OF A CONFINED MULTI-SPECIES OBJECT CRYSTAL

Resumen de: US2025076198A1

A controller of an atomic system controls operation of potential sources to cause potential generating signals to be provided. Application of the potential generating signals to respective potential generating elements causes performance of a split operation causing confinement of a first subset of atomic objects of an object crystal in a first potential well and a second subset of atomic objects of the object crystal in a second potential well. The first subset consists of one or more atomic objects. The object crystal includes atomic objects of at least two species. The controller controls operation of manipulation sources to cause manipulation signals to be incident on the first subset. The controller receives a sensor signal generated by a photodetector configured to capture fluorescence signals generated by the first subset. The controller processes the sensor signal to determine a respective species of at least one atomic object of the first subset.

プラズマ量子コンピューター

Resumen de: JP2026114875A

【課題】量子コンピューターは、通常のコンピューターで解くには複雑な問題を、量子力学の原理を利用して解くことを目的としたもので、色々な方式が研究されているが、実用化には至っていない。【解決手段】これまでに研究されている多くの量子コンピューターの二進法の０と１を電子のオンとオフで表す方式ではなく、電子の正荷と負荷で表す方式とした上で、中性子プラズマを用いて計算する。中性子プラズマは、正荷にも負荷にもなれるため、計算に使う全ての電子が０にも１にもなれることになり、量子コンピューターの特徴である超並列処理が可能となる。【選択図】なし

量子近似优化计算系统及量子近似优化计算方法

Resumen de: CN122347233A

本申请公开了一种量子近似优化计算系统和量子近似优化计算方法。系统包括问题映射模块、量子线路构建模块和执行模块，问题映射模块被配置为对待求解问题进行编码映射处理，确定量子算符，量子线路构建模块被配置为根据待求解问题的问题约束属性和量子算符，构建量子演化线路，执行模块被配置为执行量子演化线路，以求解待求解问题。这样，量子近似优化计算系统通过模块化拆分构建分层架构，可使各模块可独立升级、替换和复用，同时标准化的模块作业流程能够适配不同的组合优化问题，在一定程度上降低量子线路构建与执行的开发成本，减少硬件噪声带来的干扰，提升量子近似优化算法在NISQ设备上的执行效率与结果可靠性，适配各类业务场景的求解需求。

性能診断プログラム、性能診断方法、および情報処理装置

Resumen de: JP2026113324A

【課題】量子シミュレータの性能上問題のある箇所を特定しやすくすること。【解決手段】情報処理装置１０１は、各量子回路１１１～１１３の２以上の属性それぞれを表す属性情報１２１～１２３を取得する。情報処理装置１０１は、診断対象シミュレータ１０２および他のシミュレータ１０３それぞれで各量子回路１１１～１１３を実行した場合の実行時間に基づく他のシミュレータ１０３に対する診断対象シミュレータ１０２の性能を表す性能情報１３１～１３３を取得する。情報処理装置１０１は、属性情報１２１～１２３が表す２以上の属性それぞれを説明変数とし、性能情報１３１～１３３が表す性能を目的変数として、説明変数と目的変数との関係を統計分析することにより、目的変数に対して有意な属性を属性情報１２１～１２３が表す２以上の属性から特定する。情報処理装置１０１は、特定した有意な属性を表す情報１４０を出力する。【選択図】図１

最適化装置、方法及びプログラム

Resumen de: JP2026113311A

【課題】挙動が時間変化するブラックボックスとしての目的関数の最適化問題に対して適切に対処できる最適化装置を提供する。【解決手段】時系列上で入力に対して出力を返すブラックボックスに対して最適解としての入力を近似として求める最適化装置であって、前記ブラックボックスの入力及び出力の履歴から、当該ブラックボックスの入出力関係を表す関数を、因子分解機の学習によりモデルとして求める第１処理５－ｉ、６と、前記モデルでイジングマシンを稼働させた結果として前記最適解の候補を受け取る第２処理９－ｉと、を実行し、前記第１処理及び前記第２処理を、前記履歴の複数の断片ごとに実行し、当該複数の断片ごとに前記第２処理で得られた前記最適解の候補を統合することで、前記最適解の近似結果を得る第３処理１４を実行する。【選択図】図４

一种纠缠增强等变量子图神经网络的生成方法

Resumen de: CN122347175A

本申请提供了一种纠缠增强等变量子图神经网络的生成方法，装置、存储介质和电子装置，其技术要点：构造量子等变门集；通过可训练图压缩编码器编码图节点特征,图节点特征经过量子自编码器进行降维，去除特征冗余部分，设定基于保真度的节点代表性指标，根据所述节点代表性指标对图节点进行选择压缩；构造等变量子图神经网络架构，通过生成的所述量子等变门集等变门集构建量子图神经网络层，使用图的边信息对节点特征表示进行纠缠；针对图数据进行图分类或图回归得到结果，测量电路得到经典表示，接着将其输入经典全连接网络中得到图分类或回归结果。

任务处理方法、装置、介质、设备及量超智融合计算系统

Resumen de: CN122346391A

本申请提供一种任务处理方法、装置、介质、设备及量超智融合计算系统，其中，本申请通过构建高性能的量子计算芯片互连，形成大规模的量子计算集群，以增加可用的量子比特数，提高量子计算的并行性和能效。同时，提出一种基于共享资源模型的新型计算范式，为众核控制芯片、智能计算模块和QPUs组成的量超智融合计算系统设计交互模式，以消除通信延迟并最大限度地提高系统在执行算法任务时的计算速度。

スケーラブルな光学空洞ロックのための装置、方法、及びシステム

Resumen de: GB2630371A

An apparatus 100 and system for stabilising or locking the length of plural optical cavities comprises an optical light source 102 configured to output an incident light beam 112 and a separating means 104 to split the incident beam 112 to output plural light beams 114 to a plurality of optical cavities 106, each configured to receive one of the light beams and transmit or reflect a portion of light indicative of whether the optical cavity is on resonance with the light source. A matter qubit 108 within each optical cavity is configured to capture photons to distribute quantum entanglement, wherein a rate of entanglement is enhanced by the Purcell effect. Each optical cavity is connected to an actuator 110 configured to tune the length of the optical cavity 106 based on the portion of light transmitted or reflected from the optical cavity, to be on resonance with the optical source to lock the optical cavity to the optical source. The incident light beam is detuned by a ratio of two integers, a and b where a/b denotes a fixed fraction, from a transition wavelength of the matter qubit to ensure that, for each optical cavity, there is at least one point within a travel range of the actuator 110 where a dual-resonance condition is met such that the optical cavity is simultaneously resonant with the matter qubit and the incident light beam.

用于实现格基抗量子密码算法的协处理器、芯片、电子设备和密钥生成方法

Nº publicación: CN122348818A 07/07/2026

Solicitante:

华润微电子控股有限公司

Resumen de: CN122348818A

一种用于实现格基抗量子密码算法的协处理器、芯片、电子设备和密钥生成方法，协处理器包括：处理器核，包括至少两个运算核，至少两个运算核能够实现格基抗量子密码算法的全部运算；寄存器，用于存储调用所述运算核中函数所需的配置信息；存储器控制器，用于在所述至少两个运算核的控制下，根据所述配置信息对存储器中的数据进行调用，以实现至少两个运算核彼此之间能够并行运算。本申请的协处理器实现了格基抗量子密码算法中运算函数的全硬件化设计，能够极大提升算法整体流程的运算速度，此外，部分密码学函数能够并行处理，在进一步提升运算性能的同时也极大地提高了对系统及硬件资源的利用率，可应用到对算法运算性能更高的中高端产品中。