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CLIFFORD PERTURBATION THEORY-BASED ERROR MITIGATION

Resumen de: US20260340392A1

Systems/techniques that facilitate Clifford Perturbation Theory-based error mitigation are provided. In various embodiments, a system can comprise a memory that stores computer executable components. In various embodiments, the system can further comprise a processor that executes the computer executable components stored in the memory, wherein the computer executable components can comprise an expansion component that can construct a perturbative series expansion of a noise deconvolution map of a quantum circuit, wherein the noise deconvolution map is a product of an inverse of the quantum circuit and an ideal realization of the quantum circuit. In various aspects, the computer executable components can further comprise a measurement component that can invert noise on an expectation value of an observable measured on the quantum circuit based on the perturbative series expansion.

ENERGY EFFICIENT COHERENT QUANTUM CONTROL OF SPIN QUBITS WITH NANOSCALE MAGNETS

Resumen de: WO2026226174A1

Embodiments combine energy-efficient surface acoustic waves to control nanoscale magnets magnetization and used of microwave fields to coherently control spins. It utilizes nanomagnets driven acoustically by microwave voltage application, coupling strongly with nearby spins (e.g., NV center in diamond) to manipulate spin states with low power consumption, significantly increasing energy efficiency compared to conventional methods.

SUBSTRATE MODIFICATIONS TO SUPPRESS CORRELATED ERRORS IN MULTIQUBIT ARRAYS

Resumen de: US20260344298A1

Qubit arrays having substrates that are engineered to suppress correlated dephasing errors, correlated relaxation errors, or both are provided. Also provided are quantum circuits incorporating the qubit arrays and quantum computers incorporating the quantum circuits. The engineered substrates can be used to suppress noise and correlated errors in any qubit array that suffers from charge fluctuations or other noise that creates a non-equilibrium, error-producing state in the qubit array.

CYBER-PHYSICAL ARCHITECTURE FOR QUANTUM-ACCELERATED INDUSTRIAL MANUFACTURING AND AUTONOMOUS EXPERIMENTATION

Resumen de: US20260339300A1

A hybrid quantum-classical cyber-physical control architecture for real-time optimization and automated actuation of complex industrial processes, including an industrial digestive system configured to transform heterogeneous feedstocks into valuable resources. The system continuously ingests streaming analog telemetry from physical sensor networks, utilizing a quantum industrial problem compiler to dynamically convert process states and multi-objective physical constraints into structurally bounded, quantum-computable representations. A latency-aware orchestrator dispatches these artifacts to quantum computing resources while managing deterministic classical fallbacks to ensure continuous operation. To safely bridge quantum optimization insights with rigid physical hardware limits, an actuation stability gateway decodes quantum candidate solutions, applies reverse-scaling, and utilizes mathematical gradient dampening on out-of-bounds parameters prior to mechanical actuation. The architecture further enables multi-site graph partitioning and an automated high-throughput experimentation discovery loop, providing continuous, self-learning adaptation and optimized resource recovery across dynamic manufacturing environments.

PATTERN-LOCK TOPOLOGICAL BOUNDARY DEVICES METHODS AND APPARATUS FOR LOSSLESS EDGE CHANNELS AND GOLDEN-RATIO TILED SURFACE-CODE QUBITS USING RECOGNITION-PHYSICS PATTERN-CHARGE INVARIANT

Resumen de: US20260340469A1

A pattern-lock device includes a first region having a first integer pattern-charge value J1, a second region having a second integer pattern-charge value J2 different from J1, and an interface between the regions. When DeltaJ=J2−J1 is non-zero, the interface supports one or more localized boundary modes. In preferred embodiments, the device includes a spacer selected to support interface localization, and each mode contributes a conductance quantum e{circumflex over ( )}2/h. The interface may be patterned as a routing network or along edges of an aperiodic tiling so that vertices define stabilizer sites of a qubit fabric. Disclosed embodiments further include photonic interfaces, multi-mode bus structures, superconducting hybrids, stacked architectures, controller-coupled systems, fabrication methods, validation methods, and non-transitory computer-readable media storing fabrication and runtime-control packages for implementing and operating the device.

Ground-based quantum communication system using entangled particle arrays and precision timing

Resumen de: GB2705790A

This application relates to communicating data between two stations, each equipped with a particle array. The particle arrays are entangled. Data decoding involves performing measurements at predefined time intervals. Measurements at 1ns indicate a binary 0 value whilst measurements at 2ns indicate a binary 1 value. The measurements are performed on particles. The stations are synchronised with atomic clocks which must have a drift of less than or equal to 10 pico seconds. Also disclosed is quantum communication protocol which includes integrity checking via checksums derived from correlated measurements. The invention may be applied to long distance secure communications or fault detection on a power grid.

EXPONENTIAL QUANTUM ADVANTAGE FOR MEASURING FERMIONIC OPERATORS

Resumen de: WO2025166168A1

Method, systems, and apparatus for measuring fermionic operators. In one aspect, a method includes obtaining an input comprising k-body Majorana operators, a predefined precision, and copies of a tensor product of a quantum state and the quantum state. For each Majorana operator, a basis to measure the Majorana operator in is determined. The input is processed to obtain expectation values that correspond to the Majorana operators. A graph is constructed by, for each non-zero expectation value, adding a vertex to the graph that represents a Majorana operator that corresponds to the non-zero expectation value and adding edges between vertices in the graph that represent anticommuting Majorana operators. A vertex coloring algorithm is applied to the graph. For a color that corresponds to the Majorana operator, a simultaneous eigenbasis of Majorana operators in the graph with the color is determined. The Majorana operator is measured in the determined basis.

ARTIFICIAL INTELLIGENCE-BASED DYNAMIC ADAPTATION IN QUANTUM KEY DISTRIBUTION WITHIN TELECOMMUNICATION NETWORKS

Resumen de: EP4832410A1

A computer-implemented method for performing quantum key distribution, QKD, in a telecommunication network between a first communication device and a second communication device, the method comprising:(a) measuring or monitoring, by a monitoring entity, quantum link values of a QKD process carried out with a first set of QKD operational parameters;(b) detecting, by an analytics entity, based on the monitored quantum link values, one or more operational conditions selected from: a condition, in particular a degradation, of the quantum link, a threat to the QKD, or a mobility event affecting a QKD communication party;(c) providing, in response to the detected at least one operational condition, at least a subset of the monitored quantum link values to a dynamic-adaptation-module, a threat-detection-module, a rerouting-module, or a hierarchical-control-module one or all of the modules are implemented within an adaptive-QKD node;(d) determining, by one or more of the modules, a second set of QKD operational parameters based on a one or more machine learning models trained on quantum link data and at least a subset of the quantum link values as input;(e) applying, by an operational module configured to interface with QKD hardware, the second set of QKD operational parameters to adjust the QKD process,wherein the second set of QKD operational parameters enables QKD to be maintained or improved.

Distributed quantum computing

Resumen de: GB2705788A

Designing a quantum computing system by receiving parameters for an operation mode, identifying a suitable quantum error-correcting-code (QECC), deriving a topology for the QECC 1102, dividing the topology into tiles with connections to other tiles 1104, identifying properties of quantum processing units to implement tiles comprising a plurality of qubits 1106 and identifying required network pathways to implement connections between tiles by entanglement of signals generated by qubits of each tile 1108. QECC may be a low-density-parity-check, hyperbolic or semi-hyperbolic or Floquet code. May comprise distributed quantum system. Qubits may be trapped ion, cold atom, neutral atom, photon, spin or superconducting qubits. Signals may be photons generated by qubits. Signals may have wavelength in telecommunications range. Quantum processing units may comprise computational qubits and qubit-photon interfaces that may comprise an optical cavity. May comprise entanglement generators. Entanglement may be measured by a Bell state measurement. Network pathways may comprise switches to define a path between qubits and an entanglement generator. Tile may comprise nodes associated with qubits. Network pathways may be fixed or variable. Variable pathways may comprise intermediate layer of optical pathways coupled to outputs of processing units and switching layer coupled to optical pathways and entanglement generators. Figure 11

Modular optical quantum computer

Resumen de: GB2705663A

A modular optical quantum computer 1000, the modular optical quantum computer is defined. The modular optical quantum computer comprises M modular bundles 100, wherein M is greater than or equal to 1, and wherein each modular bundle of the M modular bundles comprises: a respective switching module110; a respective graph state generation module 120; and a respective processor module 130. Each graph state generation module comprising a graph state generator configured to generate one or more graph states from the one or more photons received from the respective switching module. Each processor module comprising a quantum optical processor configured to process the photons of the graph state by performing quantum operations on the photons of the one or more graph states. photons being transferable between modules. Figure 1.

METHOD AND SYSTEM FOR CONTROLLING A QUANTUM DEVICE

Resumen de: NL2036638B1

0001 A signal generator is disclosed for generating analog signals for controlling a quantum device. The signal generator comprises a memory system that is configured to store a plurality of sequences of digital samples. The plurality of sequences comprises a first sequence and a second sequence. Each sequence out of the plurality of sequences represents an analog signal for controlling the quantum device. The signal generator also comprises a digital sample stream generator for generating a digital sample stream based on sequences of digital samples obtained from the memory system. The signal generator further comprises a digital-to-analog converter, DAC, for converting the digital sample stream into analog signals represented by the sequences of digital samples obtained from the memory system. The DAC is configured to operate at a clock frequency fDAC. The memory system comprises an auxiliary memory that is configured to store, of each sequence out of the plurality of sequences, a part of the sequence comprising the first digital sample of the sequence. The memory system comprises a main memory that is configured to store, of each sequence out of the plurality of sequences, a further part of the sequence comprising the last digital sample of the sequence.

QUBIT DEVICE

Resumen de: EP4577028A1

0001 Provided is a superconducting qubit comprising a capacitor and a Josephson junction connected to the capacitor. The capacitor comprises two opposing surfaces coated with a superconducting material. When the superconducting qubit is placed in a vacuum, a region between the opposing surfaces is evacuated. A configuration of the capacitor is such that an energy relaxation lifetime of the qubit is at least 100µs. The capacitor may comprise two electrode structures comprising a dielectric material coated with a superconducting material, each opposing surface provided by a corresponding electrode structure. Three mutually perpendicular lines can be drawn through the dielectric material, each line intersecting the superconducting material on two opposing sides of the electrode structure.

DERIVATIVE QUANTUM CIRCUITS

Resumen de: EP4575919A1

Method and systems are disclosed for computing a derivative of a quantum circuit using a hybrid quantum computing system. The method comprises receiving or determining a formulation of a parametrized quantum circuit parametrized by a continuous variable. The quantum circuit may encode a given parameter value of the continuous variable in a Hilbert space associated with a quantum elements of the quantum computer. The method further comprises determining or receiving a number of one or more distinct gap values and an equal number of distinct parameter shifts. The number of gap values is lower than the number of spectral gaps of a generator of the quantum circuit. The method further comprises executing, for each of the distinct parameter shifts, the parametrized quantum circuit with the continuous variable x increased by the respective parameter shift and with the continuous variable x decreased by the respective parameter shift. The execution of the parametrized quantum circuit comprises translating the parametrized quantum circuit into control signals for controlling the plurality of quantum elements and for readout of the plurality of quantum elements to obtain hardware measurement data; controlling the quantum computer system based on the control signals; and receiving, in response to the execution of the quantum circuit, the hardware measurement data. The method further comprises processing the hardware measurement data to obtain the derivative of the quantum circuit with r

CONTROLLING A SEMICONDUCTOR SINGLE-SPIN QUBIT

Resumen de: NL2036660B1

A method for operating a single-spin qubit in a quantum processor is described wherein the method comprises: preparing a single-spin qubit in a first quantum dot of the quantum processor, wherein information in the single-spin qubit is encoded in the single spin states of a charge carrier, preferably the single spin states of a hole, in the first quantum dot, preferably a type IV semiconductor quantum dot such as a silicon quantum dot or a silicon-germanium quantum dot; and, executing a single qubit gate operation on the single-spin qubit by modifying the quantization axis and/or energy splitting of the single-spin qubit for a predetermined time, the modification of the quantization axis and/or energy splitting being based on controlling an anisotropic g-tensor associated with the single-spin qubit and/or a magnetic field locally applied to the single-spin qubit. + Fig. 3B

Systems and methods for quadratic unconstrained binary optimization (QUBO) transformation

Resumen de: GB2705727A

A heuristic optimisation method (algorithm) that solves a combinatorial optimisation problem for automatically allocating data objects (e.g. assets) to parties. The method transforms (converts) a mixed-integer linear programming (MILP) problem into a Quadratic Unconstrained Binary Optimization (QUBO) problem. To this end, the method maps the MILP algorithm (subroutine) into a QUBO algorithm (subroutine) by replacing continuous variables of a linear objective function of the MILP problem with discrete binaries, encodes constraint parameters into constraint equations, computes an optimised allocation of the objects to parties and extrapolates to provide an optimised allocation. For example, a financial institution may have a collection (or inventory) of assets (objects), which must be allocated among a set of accounts (parties). Another example is a financial transaction where a party may lend assets to another party. In this way assets may be allocated faster; this may provide a computational or business advantage to institutions when allocating assets. Fig 1

COMPRESSING DIAGONAL CLIFFORD GATES

Resumen de: EP4831879A2

Embodiments of the present disclosure include systems and methods for magic state distillation. A first matrix is generated based on a collection of indices that reference a second matrix. A set of compressed Clifford gates is determined based on the first matrix. The set of compressed Clifford gates is applied to a set of the qubits of a quantum processor. A set of magic states of the quantum processor are obtained as a result of application of the set of compressed Clifford gates. The quantum processor may be configured based on the magic states obtained.

Electronic alignment stabilization system and method for generating highly stable spin-Qubit

Resumen de: KR20260156168A

본 발명은 AIC(Adaptive Ionization Current)를 전자 공급자(생성자)로서 역할을 하고, 스핀 트랩을 전자의 스핀 상태의 공간적 저장소로 하되, 중첩없이 업(Up), 다운(Down) 상태로 전자가 존재하도록 함으로써 AIC가 전자 흐름의 배경장을 유지하고, 스핀 트랩이 그 흐름에서 추출한 전자 하나를 안정화시켜 저장할 수 있는 고안정 스핀 큐비트 생성을 위한 전자 정렬 안정화 시스템 및 방법에 관한 것이다. 본 발명은 초고전위 미세 전류의 제어를 통해 자유전자의 발생원천을 제공하기 위한 AIC(Adaptive Ionization Current) 발생부; 상기 AIC 발생부에 연결되어 전기장을 형성하며 자유전자의 발생을 유도하기 위한 미세전류 전극; 상기 자유전자에 일정한 펄스를 인가하기 위한 고전위 펄스 전압 인가부; 상기 고전위 펄스 전압 인가부에 연결되어 자유전자의 단방향 정렬을 유도하기 위한 펄스전압 전극; 및 단방향으로 정렬된 자유 전자의 회전(spin)을 포획한 후 2진 상태의 스핀 큐비트(S-Qubit)를 안정화시켜 저장하는 스핀 트랩을 포함하는 고안정 스핀 큐비트 생성을 위한 전자 정렬 안정화시스템 및 방법을 제공한다.

METHOD, SYSTEM, COMPUTER PROGRAM AND COMPUTER-READABLE STORAGE MEDIUM FOR DETERMINING A LOADING STATE OF A STRING OF IONS OF AN ION TRAP OF A QUANTUM COMPUTER

Resumen de: WO2025132625A1

A method for determining a loading state of a string of ions of an ion trap (2) of a quantum computer is specified, comprising - providing a measurement information of the string of ions, - determining a number of ions of the string of ions dependent on the measurement information, - determining a health information dependent on the measurement information, wherein the health information is characteristic of a comparison of measurement properties of the string based on the measurement information and predetermined properties of the string being numerically calculated, and - determining the loading state of the string of ions dependent on the number of ions and the health information, wherein the loading state of the string is characteristic of a successful loading of the string or of an adjustment of the string. Further, a system (1), a computer program and a computer-readable storage medium are specified.

PHOTONIC STRUCTURE HAVING EFFECTIVE REFRACTIVE INDEX PROFILE

Resumen de: US20250208343A1

0000 Photonic structures and systems including photonic structures are provided. An example photonic structure includes a plurality of layers. Each layer includes a respective material of two or more materials. Each of the two or more materials has a respective refractive index. A first layer of the plurality of layers is at least partially disposed on a substrate. The respective refractive index of a first material of the two or more materials has a different refractive index than a second material of the two or more materials. Each layer of the plurality of layers has a thickness that is at most one tenth of an intended use wavelength.

METHOD FOR CONTROLLING AND/OR MONITORING ONE OR MORE ASSET TRANSFERS

Resumen de: WO2025132481A1

The invention refers to a controlling and/or monitoring of an asset transfer. Time series monitoring data related to the asset is provided. A trained data-driven model is provided. The data-driven model partially includes discrete weights, wherein the model has been trained i) by providing a training data set including a) control and/or monitoring data of asset transfers and b) time series monitoring data related to the asset, ii) by initializing the model on a classical computer based on the training data set and iii) by providing the initialized model for determining the discrete weights based on the training data set to a quantum computer. The trained model determines control and/or monitoring data for controlling and/or monitoring an asset transfer based on the time series monitoring data. Control and/or monitoring data are generated based on the trained data-driven model and the time series monitoring data related to the asset.

FABRICATION METHOD FOR ELECTRIC CIRCUIT DEVICE, AND QUBIT DEVICE

Resumen de: WO2025134388A1

Provided is a fabrication method for an electric circuit device, the fabrication method including forming a conductive layer on a substrate, forming a bottom resist layer on the conductive layer, forming a cover layer on the bottom resist layer, forming a top resist layer on the cover layer, forming a contact hole in the substrate by using the top resist layer as a mask, forming a first undercut structure by etching the bottom resist layer below the cover layer, and forming a contact metal layer on a sidewall of the contact hole and above a front surface of the substrate after the first undercut structure is formed.

TOPOLOGICAL DEVICES WITH AN ASYMMETRIC JUNCTION DESIGN

Resumen de: WO2025136525A1

Topological devices with asymmetric junction(s) are described. An example topological device (100) includes a superconducting wire (112) comprising a first segment (114) and a second segment (116), where the first segment (114) is configurable to be in a trivial phase and the second segment (116) is configurable to be in a topological phase. The topological device further includes an asymmetric junction (182), at an interface of the first segment (114) and the second segment (116). The asymmetric junction (182) is operable to couple a Majorana zero mode, MZM, in the second segment (116) to a quantum dot (172) or a transport lead (153) such that the asymmetric junction (182) increases strength of a coupling between the MZM and the quantum dot (172) or the transport lead (153) while reducing strength of a coupling between any states formed in the first segment (114) of the superconducting wire (112) and the quantum dot (172) or the transport lead (153).

QUANTUM COMPUTING WITH SEQUENTIAL QUANTUM PROCESSORS THROUGH BIAS TERMS

Resumen de: WO2025133377A1

The invention relates to a computer-implemented method for solving a combinatorial optimization problem encoded in the ground state of an Ising spin-glass model. In particular, the invention introduces a method called bias field digitized counterdiabatic quantum optimization (bf-DCQO) for solving combinatorial optimization problems on digital quantum computers. This method integrates auxiliary counterdiabatic (CD) terms into the adiabatic Hamiltonian and introduces bias terms derived from classical methods, quantum annealers, or iterative DCQO applications. This approach addresses the limitations of current quantum computers, particularly their limited coherence times, and improves the time to solution for large-scale problems compared to traditional DCQO and finite-time adiabatic quantum optimization. The bf-DCQO method is entirely quantum, avoiding the trainability issues of variational quantum optimization algorithms. It significantly outperforms the Quantum Approximate Optimization Algorithm (QAOA) in success probability and approximation ratio. Experimental implementation on a trapped-ion quantum computer and a superconducting processor demonstrated its effectiveness on a maximum weighted independent set problem with 36 qubits and a spin-glass problem on a heavy-hex lattice with 100 qubits. This represents the largest such problem solved on a gate-based quantum computer using a purely quantum algorithm.

METHOD OF FREQUENCY SPECTRUM SHAPING OF A CONTROL PULSE, METHOD OF GENERATING A CONTROL PULSE, AND CORRESPONDING APPARATUS, QUANTUM COMPUTER AND QUANTUM SENSOR

Resumen de: WO2025131294A1

Provided is a method for shaping a frequency spectrum of a control pulse with a given control pulse duration. In one aspect, one or more finite frequency ranges to be suppressed in the frequency spectrum are determined, at least one of the finite frequency ranges defined based on one of the predetermined frequencies. Then, a spectral energy of the control pulse over the one or more finite frequency ranges is minimized and at least one of the parameters of the shaped control pulse is determined through the minimizing of the spectral energy. In this manner, the pulse can be shaped not to contain determined finite frequency ranges. Provided is also a method for generating a control pulse with a given pulse duration, said control pulse, an apparatus for generating said control pulse and a quantum computer comprising said apparatus.

METHOD FOR QUANTUM COMPUTING

Nº publicación: EP4829808A1 28/10/2026

Solicitante:

AALTO UNIV FOUNDATION SR [FI]
Aalto University Foundation SR

Resumen de: WO2025133464A1

The disclosure presents a method for performing quantum computation The method comprises formulating a quantum Hamiltonian as a function of a first set of quantum states and providing a quantum simulator system, a set of quantum control systems, and a set of quantum resource systems. The method also comprises preparing the first set of quantum states on the set of quantum resource systems and applying a set of SWAP gates on the set of quantum simulator systems, the set of quantum control systems, and the set of quantum resource systems. The method also comprises determining the evolution of the set of quantum simulator systems by measuring one or more output quantum states from the set of quantum control systems or quantum resource systems.