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EFFICIENT FAULT-TOLERANT TROTTER SIMULATION OF MOLECULAR HAMILTONIANS

Resumen de: US20260244962A1

Methods, systems and apparatus for determining properties of a physical system described by an electronic structure Hamiltonian. In one aspect, a Hamiltonian describing the physical system is transformed into a qubit Hamiltonian describing a corresponding system of qubits. The qubit Hamiltonian comprises multiple two-qubit interaction terms, each comprising a respective translation invariant coefficient. The system of qubits is evolved under a unitary operator generated by the multiple two-qubit interaction terms. The evolution includes applying layers of quantum logic gates to the system of qubits, wherein each application of a layer evolves the system of qubits under a unitary operator generated by a respective subset of the multiple two-qubit interaction terms and wherein the value of the coefficients of the subset of the multiple two-qubit interaction terms that generate the unitary operator is constant. The evolved system of qubits is measured and properties of the physical system is determined.

QUANTUM ERROR CORRECTION

Resumen de: US20260244973A1

0000 Apparatus for quantum error correction is disclosed. The apparatus includes an array of processing cores, each processing core comprising: a processor on a first chip; and a processor cache on the first chip; and a bus for interconnecting neighbouring processing cores in the array of processing cores; wherein each processing core includes: control code which, when executed by the processor, causes the processor to access a processor cache of at least one neighbouring processing core.

HANDLING COMPONENT FAILURES IN SURFACE CODE CIRCUITS

Resumen de: AU2025323507A1

Methods, systems, and apparatus for performing a surface code cycle. In one aspect, a method includes, for a quantum computer comprising qubits arranged on a grid, wherein pairs of neighboring qubits are coupled through respective qubit couplers: receiving indications that one or more qubit couplers included in the quantum computer are defective qubit couplers; compiling a quantum circuit using the indications, comprising: for each sub-grid of a predetermined partition of the grid into multiple sub-grids: assigning, constrained on the defective qubit couplers, a first set of entangling operations to squares in the sub-grid that comprise a respective defective qubit coupler; and assigning a second set of entangling operations to remaining squares in the sub-grid according to a pre-determined rule that preserves the distance of the surface code; and performing the surface code cycle, comprising applying the quantum circuit to the plurality of qubits.

TRAINING METHOD AND ELECTRONIC DEVICE FOR QUANTUM MACHINE LEARNING

Resumen de: US20260244971A1

This disclosure proposes a training method for quantum machine learning and an electronic device. The training method includes: configuring a quantum circuit to output probabilities of multiple qubits, where the quantum circuit comprises multiple gates with circuit parameters; mapping the qubits to multiple model parameters of a neural network, where multiple bases are calculated based on the qubits, and the quantity of the bases is greater than or equal to the quantity of the model parameters; inputting data into the neural network and calculating a loss based on the output of the neural network; and updating the circuit parameters in the quantum circuit according to the loss.

QUANTUM PROCESSOR ARCHITECTURE

Resumen de: AU2025225223A1

There is provided a quantum processor comprising a plurality of qubits, wherein the qubits are arranged such that direct interactions between any two qubits are suppressed, a harmonic oscillator mode coupled transversally to the plurality of qubits, a plurality of adiabatic driving lines associated with said plurality of qubits, wherein each adiabatic driving line is configured for driving a respective qubit with an adiabatic driving signal and a control module configured to drive concurrently at least a first qubit and a second qubit by their respective adiabatic driving lines with a first and second adiabatic driving signals and adjust a first waveform of the first adiabatic driving signal and a second waveform of the second adiabatic driving signal to establish a ZZ gate between the at least first and second qubits.

Intermediate Representation of a Quantum Program

Resumen de: US20260244966A1

0000 A method, apparatus and product for executing a quantum circuit by a quantum execution platform, comprising: obtaining the quantum circuit, the quantum circuit comprises first and second qubit allocation instructions, the first qubit allocation instruction instructing to obtain a first set of qubits at an initial cycle, the second qubit allocation instruction instructing to obtain a second set of qubits at an intermediate cycle ordered after the initial cycle; performing an execution of cycles of the quantum circuit, said performing comprises allocating, for the initial cycle, qubits from a qubit pool to be utilized by the quantum circuit, the qubits corresponding to the first set of qubits; and in response to the execution reaching the intermediate cycle, dynamically allocating at least one additional qubit from the qubit pool to be utilized by the quantum circuit, the at least one additional qubit corresponding to the second set of qubits.

NARROWBAND TUNABLE COUPLER FOR SUPERCONDUCTING QUANTUM CIRCUITS

Resumen de: EP4793837A1

0001 Summarizing the invention, a method for indirectly coupling a first superconducting quantum circuit and a second superconducting quantum circuit is provided. The method comprises: providing the first superconducting quantum circuit and the second superconducting quantum circuit such that the first superconducting quantum circuit and the second superconducting quantum circuit are electromagnetically isolated from each other; electromagnetically coupling a coupler circuit to the first superconducting quantum circuit and to the second superconducting quantum circuit, wherein the first superconducting quantum circuit and the second superconducting quantum circuit are coupled to the coupler circuit with equal strength; setting a resonance frequency of the first superconducting quantum circuit to a common frequency; setting a resonance frequency of the second superconducting quantum circuit to the common frequency; applying an oscillating signal that makes a resonance frequency of the coupler circuit cyclically change such that the resonance frequency of the coupler circuit is equal to the common frequency at a plurality of timepoints, wherein an amplitude, a length and a frequency of the oscillating signal are set such that a first qubit state of the first superconducting quantum circuit and a second qubit state of the second superconducting quantum circuit swap.

量子コンピュータ

Resumen de: WO2025013116A1

Provided is a quantum computer, including: an input unit for inputting an electron wave packet; a propagation unit that propagates the electron wave packet in a predetermined direction and has a loop-like loop path; and a qubit generation unit that generates a time-bin qubit by using the electron wave packet.

QUBIT ISLAND WITH TOPOLOGICAL SUPERCONDUCTING WIRES AND TRIVIAL SUPERCONDUCTING WIRE

Resumen de: EP4793838A1

A qubit island including a plurality of topological superconducting wires, a trivial superconducting wire that couples the topological superconducting wires, and one or more electrostatic gates located above the topological superconducting wires and the trivial superconducting wire in a thickness direction. The plurality of topological superconducting wires each have respective topological wire widths that are greater than a trivial wire width of the trivial superconducting wire. The one or more electrostatic gates are operated at a gate voltage that places the topological superconducting wires into a single sub-band regime and places the trivial superconducting wire into a depleted regime.

SCALABLE PHOTONIC QUANTUM COMPUTING WITH HYBRID RESOURCE STATES

Resumen de: EP4793841A2

A system for scalable, fault-tolerant photonic quantum computing includes multiple optical circuits, multiple photon number resolving detectors (PNRs), a multiplexer, and an integrated circuit (IC). During operation, the optical circuits generate output states via Gaussian Boson sampling (GBS), and the PNRs generate qubit clusters based on the output states. The multiplexer multiplexes the qubit clusters and replaces empty modes with squeezed vacuum states, to generate multiple hybrid resource states. The IC stitches together the hybrid resource states into a higher-dimensional cluster state that includes states for fault-tolerant quantum computation.

回転誤差抑制のための方法、システム、及び量子回路

Resumen de: AU2025271522A1

In a first aspect, a method for suppressing rotating implementation errors in a multi- qubit quantum logic operation ��. The method comprising applying at least one of: a corresponding single-qubit prefix gate, before applying said quantum logic operation ��; and, a corresponding single-qubit suffix gate, after applying said quantum logic operation 5  ��. Coefficients of Pauli terms, of any one of said prefix gate and said suffix gate, are based on an accumulated time from a beginning of a quantum circuit to the quantum logic operation ��. In a second and aspect, a method for rotating dynamical-decoupling for pair- wise application of a quantum logic operation ��. In further aspects, a characterization method for rotating implementation errors, and systems for implementation of the methods. 10  ov o v FFig.. 1 Time = ⋯ ⋯ = exp ⋯+ 2≝ cos − sin ∝ Ω̇Δ Δ > 0 Δ < 0 t G = = ^ ov t o v

INTERFACING BETWEEN SFQ AND NRZ DATA ENCODINGS

Resumen de: EP4794203A2

0001 Superconducting interface circuits and methods convert between non-return-to-zero (NRZ) encoded voltage signals and reciprocal quantum logic (RQL) compliant signals of opposite-polarity single flux quantum (SFQ) pulse pairs, and vice-versa, so as to provide highspeed NRZ input to, and output from, RQL computing circuitry.

QUANTUM CIRCUITS AND DECODERS FOR COLOR CODES

Resumen de: WO2025111284A1

A quantum computing system (QCS) includes a set of physical qubits (PQs). A quantum error correction (QEC) code includes a first stabilizer that corresponds to a first basis and stabilizes a quantum state of a first subset of the set of PQs and a second stabilizer that corresponds to a second basis and stabilizes the quantum state. Implementing the QEC code includes operating a quantum circuit. Operating the quantum circuit encodes a first bit that corresponds to a first quantum parity and a second bit that corresponds to a second quantum parity in a first qubit-pair of the set of PQs. The quantum parities are associated with the quantum state. The first parity is associated with the second basis. The second parity is associated with the first basis. Operating the quantum circuit multiplexes measurements of the first parity and the second parity via basis multiplexing.

REDUCTION OF QUBIT LATTICE THAT INCLUDES DEAD DATA QUBITS AND AUXILIARY QUBITS

Resumen de: US2025124326A1

0000 A computing system including a processor configured to receive an indication of one or more dead data qubits and one or more dead auxiliary qubits among qubits included in a quantum computing device. The qubits are arranged in a lattice that includes plaquettes. Each of the plaquettes includes data qubits and auxiliary qubits. The processor is further configured to compute a reduced lattice by, for each of the plaquettes that includes at least one dead data qubit, computing a respective first reduced plaquette that omits the dead data qubit. For each of the plaquettes that includes at least one dead auxiliary qubit, the processor is further configured to compute the reduced lattice at least in part by computing a respective second reduced plaquette that omits the dead auxiliary qubit. The processor is further configured to output instructions to implement an error correction code on the reduced lattice.

INTEGRATION AND CO-PACKAGING OF CONFINEMENT APPARATUS AND APPLICATION-SPECIFIC INTEGRATED CIRCUIT (ASIC) SUBSYSTEM

Resumen de: WO2025198642A2

A confinement apparatus package is provided. The confinement apparatus chip includes a confinement apparatus die having a plurality of electrodes formed thereon, wherein the plurality of electrodes defines a confinement apparatus; an application-specific integrated circuit (ASIC) chip comprising an ASIC die having an ASIC formed thereon; and a package substrate. The ASIC die is disposed between the package substrate and the confinement apparatus die. The ASIC defines a plurality of electrical channels and each electrode of the plurality of electrodes is in electrical communication with a respective electrical channel of the plurality of electrical channels.

METHODS FOR DETERMINISTIC PREPARATION OF CAT AND GOTTESMAN-KITAEV-PRESKILL STATES

Resumen de: WO2025076585A1

This disclosure relates to preparing a cat state and a Gottesman-Kitaev-Preskill (GKP) state. An entangled state is created by feeding an initial input state into a first input of a beam splitter and feeding an initial squeezed vacuum state into a second input. The entangled state is then measured at a first output using a detector to collapse the entangled state to an output state at a second output. A subsequent entangled state is then created by: feeding the output state into the first input; updating the squeezing direction to prepare an updated squeezed vacuum state; and feeding the updated squeezed vacuum state into the second input. The subsequent entangled state is then measured to produce a subsequent output state for feeding into the first input; and the cat state is iteratively prepared by repeating the steps of creating the subsequent entangled state and measuring the subsequent entangled state.

METHOD OF OPERATING A QUANTUM CONTROL DEVICE

Resumen de: WO2025078783A1

A method (100) of operating a quantum control device (1) comprising a set of peripheral devices (7) configurable to cause one or more quantum processing units (5) to perform a plurality of operations, the method (100) comprising: receiving (103) a first object (27) defining a first set of configurations for the set of peripheral devices (7), the first set associated with a first operation to be performed; retrieving (105) a stored object (21) defining a current set of configurations for the set of peripheral devices (7); comparing (107) the first object (27) and stored object (21) to generate an update list object (31) of differences between the current set of configurations and the first set of configurations; and transmitting (109) the update list object (31) for updating configurations of the peripheral devices (7).

ELECTRONIC DEVICE COMPRISING A CRYOGENIC COMPONENT AND PROCESS FOR PRODUCING SAME

Resumen de: WO2025078545A1

The invention relates to an electronic device comprising: - a functional zone (C1) comprising a cryogenic component configured to operate at a temperature below 10 K, - a control zone (C2) comprising an electronic control component configured to control the cryogenic component, - a passive zone (C3) comprising a passive structure (22) electrically connected to the cryogenic component and to the electronic control component, the passive structure (22) being based on a superconducting material and integrated into a dielectric matrix (13). Advantageously, the dielectric matrix (13) comprises a cavity (52) around the passive structure (22), so that the passive structure (22) is partially suspended in the cavity (52).

MEASUREMENT CIRCUIT FOR SURFACE CODE

Resumen de: WO2025080387A1

A method (52) for enacting a measurement circuit (50) of a surface code on a plaquette of qubits (14) of a qubit lattice (40) comprises: distributing (52A) among a sequence of time steps a set of one-qubit projective measurements on each of three auxiliary qubits (14A) of the plaquette; distributing (52B) among the sequence of time steps a set of two-qubit projective measurements on each of four data qubits (14D) of the plaquette together with one of the three auxiliary qubits; distributing (52C) among the sequence of time steps a set of two-qubit projective measurements on two or more auxiliary-qubit pairs selected from the three auxiliary qubits of the plaquette; and advancing (52D) through each of the time steps of the sequence, executing the one- and two-qubit projective measurements distributed therein. In this method the measurement circuit corresponds to a stabilizer of the surface code, and the measurements generate measurement of a stabilizer operator.

MEASUREMENT CIRCUIT FOR MAJORANA SURFACE CODE IMPLEMENTATION

Resumen de: WO2025080389A1

A method (70) for implementing a measurement circuit (50) of a surface code on a plaquette (46) of qubits (14) of a Majorana-tetron lattice (66, 68) comprises: distributing (70A)among a sequence of time steps a set of one-qubit projective-measurement loops on each of three auxiliary qubits (14A) of the plaquette; distributing (70B) among the sequence of time steps a set of two-qubit projective-measurement loops on each of four data qubits (14D) of the plaquette together with one of the three auxiliary qubits; distributing (70C) among the sequence of time steps a set of two-qubit projective measurement loops on two or more auxiliary-qubit pairs selected from the three auxiliary qubits of the plaquette; and advancing (70D) through each of the time steps of the sequence, executing the one- and two-qubit projective measurements distributed therein. In this method the measurement circuit corresponds to a stabilizer of the surface code, and the measurements generate measurement of a stabilizer operator.

SYSTEM AND METHOD FOR PREPARING GOTTESMAN-KITAEV-PRESKILL NON-PAULI STATES OF LIGHT

Resumen de: EP4793840A1

0001 The system can include a first state factory configured to generate a sequence of first sensor states; a second state factory configured to generate a sequence of second sensor states; one or more beamsplitters optically coupled to the first state factory and to the second state factory, operable to interact the first sensor states with the second sensor states in a manner to generate entangled cluster states having multiple modes; and a homodyne detector optically coupled to an output of the one or more beamsplitters and operable to perform a homodyne measurement on a second subset of the modes at a measurement angle in phase space, the homodyne measurement causing the encoding of the non-Pauli states in a first subset of the modes.

辅助量子比特的逆计算方法、装置、设备及存储介质

Resumen de: CN122596281A

本发明提供一种辅助量子比特的逆计算方法、装置、设备及存储介质，所述方法包括：获取量子电路程序，所述量子电路程序包括借用语句；基于预定义的推理系统，判断所述借用语句所对应的子电路是否满足与所述借用语句的类别相对应的辅助量子比特模板的限制条件；若满足所述限制条件，根据所述借用语句的类别，按照与所述借用语句的类别对应的辅助量子比特模板所预定义的逆计算结构合成逆计算电路，并利用所述逆计算电路完成辅助量子比特的复原。实现了对干净辅助比特和脏辅助比特的自动逆计算。

用于长距离量子能力互联网的系统和方法

Resumen de: WO2025221304A2

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.

用于原子阵列重排的图神经网络的训练方法，使用图神经网络的原子阵列重排方法，电子设备和计算机可读存储介质

Resumen de: CN122596154A

提供了一种用于原子阵列重排的图神经网络的训练方法，使用图神经网络的原子阵列重排方法，电子设备和计算机可读存储介质。用于原子阵列重排的图神经网络的训练方法通过在时间扩展图上求解最小费用最大流，以二分搜索确定最优帧数，并从最优流量解中提取最优原子‑目标配对编号及每个原子的最优帧执行编号形成联合结构化训练标签，以此训练包括匹配头、帧分配头和兼容头的三头图神经网络。这样，使用图神经网络的原子阵列重排方法在进行原子阵列重排时，匹配头以可微配对解码输出配对结果，帧分配头通过对每个原子取argmax直接输出帧执行编号，以消除贪心图着色后处理，由此实现了低推理延迟时间和低帧数的原子阵列无路径冲突重排。

光量子计算设备的稳定性评估方法、系统及相关设备

Nº publicación: CN122596285A 18/08/2026

Solicitante:

北京玻色量子科技股份有限公司

Resumen de: CN122596285A

本申请公开了一种光量子计算设备的稳定性评估方法、系统及相关设备。该方法包括：获取光量子计算设备针对同一计算任务重复执行多次所产生的耗时数据，每次执行对应的耗时数据包括端到端耗时和纯计算时间；基于多次执行对应的端到端耗时计算第一离散度指标，得到表征系统整体稳定性的第一抖动率，并基于多次执行对应的纯计算时间计算第二离散度指标，得到表征设备底层硬件稳定性的第二抖动率；基于第一抖动率与第二抖动率的对比结果，确定光量子计算设备的稳定性瓶颈所属的系统层级，并生成稳定性评估结果。本申请能够区分光量子计算设备稳定性瓶颈所属的系统层级，将成功但不稳定的隐性问题转化为可量化的评估指标。