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214
resultados
Última actualización
11/09/2026 [08:08:00]
Resumen de: DE102025108884A1
Ein Verfahren zur Erhöhung einer Kohärenzzeit während einer Quantenberechnung mit mindestens zwei Qubits ist angegeben, wobei das Verfahren umfasst:- Anlegen eines Quantengatters an die mindestens zwei Qubits,- Anlegen einer Signalsequenz an die mindestens zwei Qubits zumindest während einer Evolutionszeit des Quantengatters, so dass die Kohärenzzeit der mindestens zwei Qubits während der Quantenberechnung erhöht wird, wobei- die Signalsequenz mindestens zwei Signalsequenzblöcke umfasst,- jeder Signalsequenzblock eine Amplitude und eine Phase aufweist,- mindestens zwei Phasen von aufeinanderfolgenden Signalsequenzblöcken voneinander verschieden sind, und- die Amplitude vorbestimmt ist, um Rabi-Oszillationen für die mindestens zwei Qubits zu induzieren, wobei die Rabi-Oszillationen eine verstimmte Frequenz haben, die nah-resonant mit einer Fallenfrequenz ist.Ferner werden eine Vorrichtung, ein Quantencomputer, ein Computerprogramm und ein computerlesbares Speichermedium angegeben.
Resumen de: US20260267068A1
A quantum device includes a plurality of quantum bit elements each including a diamond crystal layer and a color center, the diamond crystal layer having a central portion and extending portions connected to the central portion and extending in 2n directions (n is an integer of 2 or more) from the central portion, the color center being formed in the central portion, an input optical waveguide that is connected to each of n ends of the extending portions and transmits light introduced into the color center, an output optical waveguide that is connected to each of n ends of the extending portions and transmits a photon emitted from the color center, and a branching element connected to the output optical waveguide of a first quantum bit element of the quantum bit elements and the output optical waveguide of a second quantum bit element of the quantum bit elements.
Resumen de: US20260268194A1
A method of implementing a rotation gate having a selectable rotation angle using a quantum device with discretised gates each having a discrete gate angle setting, the method comprising: (i) receiving an instruction to apply a rotation gate having a selected rotation angle; (ii) determining at least three discretised gates, based on the selected rotation angle, each having different discrete gate angle settings; (iii) determining a relative frequency; (iv) selecting one of the determined discretised gates based on the determined relative frequency; (v) applying the selected discretised gate to a qubit; (vi) measuring the state of the qubit to provide an output; (vii) repeating steps (iv)-(vi) a plurality of times; and (viii) combining the outputs from step (vi) to obtain a combined output based on the selected discretised gates.
Resumen de: US20260268035A1
A simulation device includes: a tensor contraction calculation unit that performs a contraction calculation in a tensor network corresponding to a quantum gate operation on the basis of the states of qubits in a quantum circuit and information indicating a quantum gate operation to be applied to the qubits; a matrix product state composition unit that composes a matrix product state from the states of the qubits obtained as a result of the contraction calculation by the tensor contraction calculation unit; and a low-rank approximation calculation unit that performs a low-rank approximation for each of a plurality of quantum gate operations lumped together when the matrix product state composition unit composes the matrix product state.
Resumen de: US20260268188A1
A quantum system for performing a CNOT gate is disclosed, wherein the quantum system comprises a command circuit for providing radiation, a target cat qubit device and a control qubit device, coupled linearly, and wherein the target cat qubit comprises a non-linear element that is an Asymmetrically Threaded Superconducting Quantum Interference Device (ATS) and which serves two purposes: engineering the 2-photon conversion Hamiltonian for cat qubit stabilization and engineering the CNOT Hamiltonian for performing a CNOT gate with the control qubit device. At any point in time, the ATS serves either the role of cat qubit stabilization or the role of CNOT gate.
Resumen de: US20260268201A1
A quantum system for performing a quantum gate comprises a command circuit for selectively applying radiation, a number of data resonators equal to or greater than two, each data resonator having a respective resonance frequency and being coupled to the command circuit for stabilizing a respective data cat qubit, and an ancilla resonator having an ancilla resonance frequency coupled to the command circuit for stabilizing an ancilla cat qubit and being non-linearly coupled via the command circuit to the data resonators. The command circuit is arranged to perform a quantum gate by: while stabilizing the ancilla cat qubit, applying a radiation having the ancilla resonance frequency such that the data resonators and the ancilla resonator are substantially simultaneously subject to a Hamiltonian resulting from the radiation, and turning off the radiation after a chosen duration. This principle is extended to perform a quantum correction error code.
Resumen de: AU2025426849A1
One example aspect of the present disclosure is directed to a method for operating a quantum computing system (QCS) that includes a set of qubits. The method includes generating a set of noisy data by repeatably measuring a noisy observable of a quantum circuit operating on the set of qubits. The set of noisy data and the noisy observable are subject to noise associated with the quantum circuit and each datapoint of the set of noisy data is associated with an eigenvalue of the noisy observable. The noisy data is modeled as a hybrid distribution, which includes a combination of a noiseless distribution and a noise-only distribution. Each datapoint of the set of noisy data is assumed to have a hidden label as coming from either the noiseless distribution or the noise-only distribution. This label is estimated for each datapoint, based on the eigenvalue associated with the datapoint, and a constructed model for any of the hybrid distribution, the noise-only distribution, and the noiseless distribution. This may require additional data to be taken from the QCS to model the noise-only distribution. A target quantity is determined based on either the model for the noiseless distribution or the datapoints combined with their attached labels.
Resumen de: US20260268192A1
In a dynamic resonance frequency changing method, there is a problem in phase tracking, and there is a concern that an error of a single-qubit gate occurs. The solution is a method of controlling a quantum bit that controls a spin state of a quantum bit formed by a charge trapped in a semiconductor device. The method includes: when controlling a spin state of a quantum bit formed by a target charge specified by a first line and a second line formed in the semiconductor device, executing a first step of measuring at least one of a current and a charge amount flowing through the first line and the second line; and executing a second step of controlling at least one of the current and the charge amount flowing through the first line and the second line based on a measurement result of the first step.
Resumen de: US20260269803A1
A method for exciting a resonator at an estimated resonance frequency of the resonator comprises: (a) varying a frequency of an input signal applied to the resonator while recording an output signal from the resonator; (b) for each of a series of frequency values of the input signal, computing noise-filtered, complex first and second derivatives of a ratio of the output signal to the input signal; (c) for each of the series of frequency values of the input signal, computing a real part of a dot product of the complex first and second derivatives as vectors projected onto a complex plane; and (d) exciting the resonator an excitation frequency where the real part vanishes.
Resumen de: AU2025261035A1
Methods, systems, and apparatus for Hamiltonian simulation of low-energy initial quantum states. In one aspect, a quantum circuit that performs unitary time evolution for a Hamiltonian is determined. The Hamiltonian is mapped to a corresponding gap-amplifiable Hamiltonian with a low energy subspace, the gap-amplifiable Hamiltonian comprising one or more matrices, where each matrix comprises a respective block encoding that is dependent on a parameter λ. An intermediate Hamiltonian is determined, where eigenvalues of the intermediate Hamiltonian are the same as eigenvalues of a square root of the gap-amplifiable Hamiltonian. A block encoding of the intermediate Hamiltonian divided by the square root of λ is determined. A filter is applied to the block encoding to obtain a polynomial approximation of the unitary time evolution operator for the Hamiltonian. The quantum circuit is applied to an initial state that is supported in the low-energy subspace.
Resumen de: AU2025235576A1
An optimal route can be determined for delivering an item through a logistics system where vehicles have multiple stops when traveling along routes. The optimal route is determined using a hybrid system employing a classical computing device and a quantum annealer. The classical device reduces the search space that allows the quantum annealer to determine a more optimal solution. In an aspect, a routing graph comprising nodes and edges is populated from routes of vehicles, where the nodes identify locations and the edges represent routing data. At least a portion of the nodes and edges is removed to form a refined routing graph. For an origin–destination input, the refined routing graph can be filtered according to a first set of routing constraints to form a reduced route search space. A quantum annealer is invoked according to an objective and a different second set of routing constraints.
Resumen de: US20260268189A1
Technologies for simulating and optimizing electromagnetic pulses are disclosed herein. A quantum computing system generates, based on a specification of one or more system parameters, one or more control values, and one or more noise offsets, a controlled environment for a quantum computing system. The quantum computing system simulates, as a function of the control values, one or more pulses within the controlled environment. One or more candidate pulses are identified based on an evaluation of the simulated pulses. A sequence comprising properties of at least one of the candidate pulses is returned.
Resumen de: AU2025214821A1
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.
Resumen de: US20260268187A1
Methods, systems and apparatus for benchmarking quantum computing hardware. In one aspect, a method includes defining an initial circuit configured to operate on an array of qubits, wherein the initial circuit comprises multiple instances of the two-qubit gate, wherein each instance of the two-qubit gate performs a same operation on a respective pair of neighboring qubits in the array; partitioning the initial circuit into multiple layers, wherein instances of the two-qubit gate in a respective layer can be implemented in parallel; for each of the multiple layers: constructing benchmarking circuits for the layer, wherein each benchmarking circuit for the layer comprises one or more cycles of quantum gates, each cycle comprising: the layer of instances of the two-qubit gate, and a plurality of single qubit gates; implementing the constructed benchmarking circuits to obtain experimental benchmarking data; and adjusting control parameters of the control model using the experimental benchmarking data.
Resumen de: US20260268195A1
A quantum device includes a quantum bit element that includes a first diamond crystal layer having a first center point and having a shape extending in four directions from the first center point, a second diamond crystal layer having a second center point and having a shape extending in four directions from the second center point, and a color center present in one of the first diamond crystal layer and the second diamond crystal layer, the first diamond crystal layer and the second diamond crystal layer being stacked so that at least parts of the first center point and the second center point overlap each other, a first optical waveguide connected to each of four first ends of the first diamond crystal layer, and a second optical waveguide connected to each of four second ends of the second diamond crystal layer.
Resumen de: US20260265062A1
The invention generally relates to new electron spin containing materials and in particular methods of preparing such materials in order to spatially separate electron spins from atmospheric oxygen and moisture.
Resumen de: EP4804089A1
A method of correcting errors in a repetition code protected quantum memory, comprising an initial step of measuring parities between adjacent qubits along a one dimension presentation of the code, and locating apparent defects on a map of said one dimension presentation of the code on the basis of the measured parities, and a subsequent treatment step during which each site of the map is associated with a local automaton, the local automaton displacing apparent defects along the map on the basis of a simulated attractive interaction between apparent defects, said interaction being simulated with local memory and communicated from site to site, the automaton erasing apparent defects by pairs when pairs of apparent defects become adjacent on the map.
Resumen de: GB2704546A
An ion shuttling control system 300 is disclosed for use in trapped ion quantum computing. The ion shuttling control system includes a controller 302 configured to generate a first operation code, the first operation code indicating a first ion manipulation operation of a plurality of ion manipulation operations and a first set of electrodes of a plurality of sets of electrodes 362 of an ion trap; a plurality of digital-to-analog converters (DACs) 354 configured to generate a first set of analog waveforms, the first set of analog waveforms being selected based on the first operation code; and a switching network 356 configured to provide the first set of analog waveforms to the first set of electrodes, the first set of electrodes being selected based on the first operation code. Figure 3
Resumen de: EP4804087A1
0001 According to an aspect of an embodiment, operations include obtaining initial quantum circuit comprising entangling gates to generate first randomized quantum circuits by applying RC protocol on initial quantum circuit. The operation further includes obtaining first combined measurement results by executing first plurality of randomized quantum circuits on quantum computer. The operation includes generating plurality of random noise-magnified quantum circuits by applying ZNE protocol on initial quantum circuit. The operation further includes generating second randomized quantum circuits by applying RC protocol on each random noise-magnified quantum circuit and obtaining second combined measurement results by executing second plurality of randomized quantum circuits on quantum computer. Finally, operation includes generating final measurement results for initial quantum circuit by applying extrapolation method on first combined measurement results and second combined measurement results.
Resumen de: GB2704433A
A system for controlling execution of a quantum algorithm that includes a processing unit (CPU 201) wherein the system uses memory-mapped addressing to access data memory that stores a measurement and indicates completion related to the algorithm. The quantum algorithm measurement operation may include determining the final state of a quantum system or extracting a single data point from a computation. The measurement data memory (referred to as Quantum Collapse Memory, QCM 202) may be composed of memory components (blocks) such as DATA RAM 205, VALID RAM 206, DONE section 207 and MASK RAM 208. The system may apply a partition mask to define and selectively store portions of a larger measurement dataset in the DATA section. CPU 201 may interact with the data memory 202 via interconnect 220, issuing instructions such as load/store instructions to access the quantum operation measurement result. The measurement data memory may be implemented as part of an FPGA, ASIC (Application-Specific Integrated Circuit) or other hardware or simulated in a software environment. The data memory may also be part of a Very-Large-Scale Integration (VLSI) system, or a software simulation of a computer system. Fig 2
Resumen de: WO2025101869A1
Methods, systems and apparatus for determining an effect of uncontrolled quantum state transitions in a noisy quantum computation performed by a quantum computing device, where the noisy quantum computation comprises execution of a quantum circuit that is represented by one or more quantum channels. In one aspect, the uncontrolled quantum state transitions are approximated as incoherent uncontrolled quantum state transitions through application of a random phase approximation to the one or more quantum channels to obtain a modified quantum circuit that is represented by one or more incoherent quantum channels. The incoherent quantum channels preserve incoherence between computational subspaces and environmental subspaces for the one or more quantum channels. A simulation of the modified quantum circuit is then performed using a qubit simulation of the modified quantum circuit.
Resumen de: WO2025096761A1
In a general aspect, quantum programs are executed on modular quantum processing units in a quantum computing system. In some implementations, a method includes receiving a quantum program including a sequence of quantum logic operations; decomposing the sequence of quantum logic operations into an equivalent sequence of quantum logic gates; and segmenting the sequence of quantum logic gates into an equivalent sequence of quantum circuit widgets. Each quantum circuit widget includes a subset of the quantum logic gates in the sequence and corresponds to a time slice of the quantum program. The quantum circuit widgets are compiled to produce a set of compiled quantum circuit widgets to be executed on multiple quantum processor modules of the quantum computing system.
Resumen de: WO2025093134A1
The present invention is related to a quantum computing arrangement comprising a plurality of qubits, to a quantum computing system comprising a plurality of said quantum computing arrangements, to a method of implementing, on a quantum computing system, a quantum error correction code, said quantum computing system comprising the quantum computing arrangement, and to the use of a quantum computing system or a quantum computing arrangement for implementing a quantum error correction code.
Resumen de: WO2025094047A1
Apparatus (20) for quantum computing includes an ion trap (24), which is configured to hold a first array of ions (40) in respective positions along an array axis (38). A radiation source (28) is configured to emit a second array of beams of coherent radiation, including first beams having respective first intensities (64) and having frequencies chosen to excite selected internal transitions of the ions and second beams having second intensities (66) at least ten times greater than any of the first intensities, and to switch respective locations of the first and second beams within the second array. Optics (82) focus the beams into the ion trap such that each beam in the second array is incident on a respective ion in the first array.
Nº publicación: EP4802422A1 09/09/2026
Solicitante:
IBM [US]
International Business Machines Corporation
Resumen de: US20250148335A1
0000 With a computerized frequency plan generator, for each node in a quantum lattice: determine a list of possible frequencies subject to at least one of nearest neighbor and next nearest neighbor collision constraints; and assign a highest possible frequency; apply a collision cleaning routine to the quantum lattice with the assigned frequencies until at least one of a condition where there are no remaining collisions and a condition where collision count ceases to improve; and apply a frequency perturbation routine to the collision-cleaned quantum lattice to move apart at least one of a high-risk nearest neighbor collision and a high risk next nearest neighbor collision.
BOPI
Sede Electrónica
