78 results about "Error mitigation" patented technology

A method, system, and computer program product for learning noise models to perform quantum error mitigation. Each target layer of a quantum circuit is divided into a set of sub-layers. Each of the sub-layers for each target layer of the quantum circuit is grouped into a reduced set of learning layers, which enables each sub-layer's noise model to be learned from fewer layers (learning layers). A learning layer refers to a layer that is used in combination with other learning layers to form the minimally complete layer set for learning all the layer components used in the quantum circuit. The noise models for each of the sub-layers are then learned on the reduced set of learning layers. Such learned noise models are combined to form a complete set of noise models for the target layers of the quantum circuit and used to perform quantum error mitigation on the quantum circuit.

Techniques facilitating error mitigation for quantum computing devices. In one example, a system can comprise a process that executes computer executable components stored in memory. The computer executable components comprise: an approximation component; a budget component; and an optimization component. The approximation component can generate an approximate decomposition of a quantum gate. The budget component can set a budget value (Cbudget) for a C-factor that is a metric for increase in variance of quasi-probability sampling. The optimization component can determine an optimal decomposition for the quantum gate as a function of Cbudget.

Systems and methods for dynamic error resolution in hybrid quantum-classical computing environments are disclosed. A system can obtain telemetry data corresponding to a processing job. The system can determine that an error resolution technique is to be applied to the quantum portion of the processing job. The system can select, for a quantum portion of the processing job, the error resolution technique from a plurality of error correction techniques and a plurality of error mitigation techniques. The system can update a hierarchical data structure representing the processing job as at least a set of nodes. The hierarchical data structure can be updated to include the error resolution technique in association with a respective node of the hierarchical data structure representing the quantum portion of the processing job.

One or more systems, devices, computer program products and / or computer-implemented methods of use provided herein relate to an intelligent and automated system to solve quantum computing related problems. The computer-implemented system can comprise a memory that can store computer-executable components. The computer-implemented system can further comprise a processor that can execute the computer-executable components stored in the memory, wherein the computer-executable components can comprise a recommendation component that can employ a machine learning model to generate, based on an input, a recommendation comprising a combination of entities comprising, one or more quantum circuits, one or more algorithms, one or more quantum hardware units, one or more error mitigation or error correction techniques, and one or more quantum procedures, to solve a defined problem comprised in the input.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a network node may obtain an erroneous packet from a first communication device. The network node may output an indication of bit error rate information, based on the erroneous packet, to a second communication device to facilitate error mitigation at the second communication device. Numerous other aspects are described.

Using a quasi-probabilistic decomposition approach, a technique combining quantum error correction and quantum error mitigation is used to simulate fault-tolerant T-gates with low sampling overhead. In some embodiments, the T-gate can be simulated using two logic bits and magic state preparation that reduces the need for magic state extraction and thus has low sampling overhead. Alternatively, the T-gate can be simulated based on code deformation performed on the surface code. Quasi-probabilistic decomposition is used to remove noise from the T-gate based on learned logical error rates.

One or more systems, devices, computer program products and / or computer-implemented methods for determining error mitigated probability distributions are provided. A system can comprise a memory that can store computer-executable components. The system can further comprise a processor that executes at least one of the computer executable components that can execute a plurality of shots of a quantum circuit to obtain noise probabilities of observables; obtain a probability distribution of the noise probabilities; determine, using the probability distribution, expectation values of the observables; perform error mitigation on the expectation values to obtain an error mitigated probability distribution; and transform the error mitigated expectation values into an error mitigated probability distribution.

The embodiment of the invention discloses a quantum error mitigation method, a fitting parameter determination method and a related device, and relates to the technical field of quantum computing. A conjugate circuit corresponding to an original quantum circuit is determined, and the overlap ratio of the conjugate circuit and the original quantum circuit is greater than or equal to 1 / 2; the conjugate circuit is easier to simulate on a classic computer, so that the simulation result of conjugation on the classic computer can be efficiently determined, and the fitting parameters of the conjugate circuit can be determined based on the simulation result of the conjugate circuit on the classic computer and the operation result of the conjugate circuit on the quantum chip. As the overlap ratio of the conjugate circuit and the original quantum circuit is high, the fitting parameter can also be used for correcting the operation result of the original quantum circuit.

Techniques for mitigating readout error for quantum expectation are presented. Calibration component applies first random Pauli gates to qubits at first output of first circuit prior to first readout measurements of the qubits. Estimation component applies second random Pauli gates to qubits at second output of second circuit prior to second readout measurements of the qubits, and generates an error-mitigated readout determination based on first random Pauli gates applied to qubits at first circuit output and second random Pauli gates applied to qubits at second circuit output. Calibration component determines calibration data based on first readout measurements. Estimation component determines estimation data based on second readout measurements. Estimation component determines normalization scalar value based on the calibration data, determines estimation scalar value based on the estimation data, and determines the error-mitigated readout determination associated with a circuit of interest based on the normalization scalar value and estimation scalar value.

Aspects of the present disclosure relate generally to systems and methods for use in the implementation and / or operation of quantum information processing (QIP) systems, and more particularly, to the use of performing automated symmetry verification on a quantum circuit. An exemplary method includes obtaining a quantum circuit with a compiled quantum program corresponding to a defined quantum computation; determining types of gates implemented on the quantum circuit; tracking allowed output states of the quantum circuit from an initial state based on the determined type of gates implemented on the quantum circuit; and detecting an error in the quantum circuit by identifying a possible output state that does not correspond to the subset of allowed output states.

The invention provides an error mitigation device and method for a continuous variable optical system, and the device is used for removing an error in a quantum signal generated by the continuous variable optical system, so as to obtain a measurement result of the quantum signal in the absence of phase damping noise. The error mitigation device at least comprises a noise modulation unit, a detection unit and a data processing unit, the noise modulation unit generates a plurality of voltage signals with different phases based on a plurality of noise parameters configured by a user, and performs phase modulation on quantum signals based on the generated voltage signals to obtain a plurality of phase-modulated quantum signals; the detection unit is used for detecting each phase-modulated quantum signal to obtain measurement results of all phase-modulated quantum signals; and the data processing unit is used for determining a measurement result of the quantum signal without phase damping noise by adopting an extrapolation method based on the noise parameters configured by the user and all measurement results detected by the detection unit.

Embodiments of the present disclosure provide systems and methods to prevent false triggering of the touchpad buttons associated with a touchpad. The false touchpad button mitigation system and method uses executable logic that upon detection of a button press event, determines whether touchpad data is currently being received from the touchpad, and when no touchpad data is currently being received, inhibit the button press event from being processed by an Information Handling System (HIS). Touchpad data refers to data generated by a touchpad when a user's finger is touching the touchpad. Thus, if the user is not actively touching the touchpad, the false button press event may be blocked by the executable logic.

Methods, systems and apparatus for determining an error-mitigated expectation value of a target observable with respect to a noisy quantum state. In one aspect a method includes obtaining multiple copies of the noisy quantum state; performing measurements on tensor products of M copies of the noisy quantum state to compute an expectation value of the target observable with respect to an entangled quantum state, wherein M≥1 and eigenvalues corresponding to non-dominant eigenvectors of the noisy quantum state in the spectral decomposition of the entangled quantum state are suppressed exponentially in M; and using the computed expectation value of the target observable with respect to an entangled quantum state to determine the error-mitigated expectation value of the target observable with respect to the noisy quantum state.

A method, system, and computer program product for improving accuracy and efficiency of quantum error mitigation / correction techniques. A model (e.g., noise model) of a quantum gate set (collection of quantum gates) that accounts for SPAM and gate errors is built by running learning circuits at different depths with different initial states and measurements to extract information about the quantum system. A gauge transformation is then applied to the quantum gate set to transform both the SPAM and gate errors together. A gauge transformation enables a different perspective of the quantum system while still preserving the underlying physics. A quantum error mitigation / correction technique is then tailored to avoid interpreting errors (e.g., SPAM, gate errors, etc.) inconsistently if treated individually using the transformed SPAM and gate errors thereby requiring fewer additional circuit runs for accurate estimations which significantly reduces the computational overhead associated with quantum error mitigation / correction.

Techniques for automatic error mitigation in database systems using alternate plans are provided. After receiving a database statement, an error is detected as a result of compiling the database statement. In response to detecting the error, one or more alternate plans that were used to process the database statement or another database statement that is similar to the database statement are identified. A particular alternate plan of the one or more alternate plans is selected. A result of the database statement is generated based on processing the particular alternate plan.

To relax a quantum error in a quantum circuit using a non-Clifford gate.SOLUTION: The information processor 10 generates second quantum-bit circuits 3a, 3c,. by replacing the first two quantum-bit gates 4a to 7a in the first quantum-bit circuit 3 with a first equivalent circuit 7 including a second two quantum-bit gate 4b that performs a gate operation of phase-rotation by a first rotation angle. The information processor 10 replaces the first 2-qubit gates 3a to 3c in the first circuit 3 with a second equivalent circuit 8 including a third 2-qubit gate 8a that performs a gate operation of phase rotation of a second rotation angle to generate third circuits 5a, 5b,. The information processor 10 makes the quantum computer 1 execute the second quantum circuits 4a, 4b,. and the third quantum circuits 5a, 5b,., and outputs the average of the executed results as the executed result of the first quantum circuit 3.SELECTED DRAWING: Figure 1

A method, apparatus and computer program product are configured to mitigate error in an inertial navigation system (INS) that relies upon a reference system to determine or update filter parameters. In a method, a determination is made of (i) deviation or divergence of a filter of the INS and / or (ii) invalidity of observation(s) by the reference system. The method also identifies the filter parameters from a history buffer associated with a prior point in time at which performance of the filter is stable. The filter parameters were updated at least once based upon observation(s) by the reference system after the prior point in time. The method forward processes sensor samples of the INS obtained subsequent to the prior point in time using the filter parameters from the history buffer at which performance of the filter was stable to mitigate the error.

A method to detect time errors in a global navigation satellite system (GNSS) receiver can include determining a carrier-to-noise (CNo) delta between a CNo ratio of a first type of GNSS signal and a CNo ratio of a second type of GNSS signal. A time error may be detected based on the first CNo delta and a first threshold CNo delta, the time error indicating a use of an erroneous time uncertainty (TUNC) by the GNSS receiver. An error mitigation operation may be performed based on detecting the time error. The first type of GNSS signal may be selected based on determining that a first level of susceptibility to errors associated with the first type of GNSS signal is lower than a second level of susceptibility to errors associated with the second type of GNSS signal.

This application discloses a quantum error mitigation method and related apparatus based on Clifford learning. The method includes acquiring a raw quantum circuit used to calculate the Hamiltonian of the system. The Hamiltonian is expanded using the tensor product of multiple Pauli operators as a basis, with each basis corresponding to a weight. A training set is generated based on the raw quantum circuit, the multiple bases, and the weights corresponding to each base. The training set includes multiple training quantum circuits. Objective functions of the multiple bases are fitted based on the Clifford simulation results and real chip operation results of the training quantum circuits. Noise-free operation results of the raw quantum circuit are determined based on the real chip operation results and the objective functions of each base. By fitting the operation results under different bases separately, this application avoids the situation where the operation results of the training set cluster at 0, thereby reducing the noise in the quantum system to an acceptable order of magnitude.

Disclosed are a computer-implemented method and a computer-implemented system for orchestrating hybrid quantum-classical execution between high-performance computing (HPC) infrastructure and one or more quantum processors (QPU). An orchestration module breaks down a work flow into subtasks and, for each subtask, compiles multiresource HPC and QPU processing telemetrics, normalises same to a canonical vector and evaluates proposed plans under hard budget constraints (time, executions, cost and / or depth). The system automatically selects an execution resource (HPC or QPU) and, when executed in an QPU, applies tiered error mitigation and verifies the result using an acceptance gate. In the event of rejection, the system executes a deterministic recovery policy with retry, execution resource switching and / or backup routing to HPC. An auditable record of decisions and metrics is generated for traceability and feedback.

In some embodiments, a computer system includes an error manager configured to obtain a first error indication corresponding to a first error associated with a computing device, the first error indication comprising a first error reference code associated with the first error, assign the first error to a first problem analysis window, obtain a second error indication corresponding to a second error associated with the computing device, the second error indication comprising a second error reference code, different from the first error reference code, associated with the second error, assign, based on the second error reference code satisfying an error classification condition, the second error to a second problem analysis window, and perform an error mitigation operation associated with at least one of the first problem analysis window or the second problem analysis window.

Techniques are provided for quantum computer error mitigation. For example, one or more embodiments described herein can include a system that can include a memory that can store computer executable components. The system can also include a processor that is operatively coupled to the memory and that can execute the computer executable components stored in the memory. The computer executable components can include an error mitigation component that interpolates gate parameters associated with a target stretch factor from within a reference model that includes reference gate parameters for quantum gates calibrated at a plurality of reference stretch factors.

Systems, methods, apparatus, and computer program products for non-line-of-sight (NLOS) error mitigation for user equipment (UE)-based positioning. For example, some embodiments described herein may provide for the use of a blind learning algorithm for channel bias distribution estimation for UE-based positioning. The UE may use the NLOS bias distribution received from a network node to perform positioning calculations for the UE, as described elsewhere herein.

Systems and techniques that facilitate scalable validation and optimization of quantum error mitigation computational workflows are provided. For example, one or more embodiments described herein can comprise a system, which can comprise a memory that can store computer executable components. The system can also comprise a processor, operably coupled to the memory that can execute the computer executable components stored in memory. The computer executable components can comprise an input component that receives a quantum error mitigation (QEM) configuration of a quantum circuit and a quantum execution backend; a quantum circuit conversion component that converts the quantum circuit into a classically simulable quantum circuit; a noise component that learns a simplified noise model of the quantum execution backend; and an evaluation component that validates or optimizes the QEM configuration over the classically simulable quantum circuit and the simplified noise model.

One or more systems, devices, computer program products and / or computer-implemented methods for determining error mitigated probability distributions are provided. A system can comprise a memory that can store computer-executable components. The system can further comprise a processor that executes at least one of the computer executable components that can execute a plurality of shots of a quantum circuit to obtain noise probabilities of observables; obtain a probability distribution of the noise probabilities; determine, using the probability distribution, expectation values of the observables; perform error mitigation on the expectation values to obtain an error mitigated probability distribution; and transform the error mitigated expectation values into an error mitigated probability distribution.

This disclosure relates to a method for mitigating error of a solution from a quantum processor. The method comprises performing by a classical processor the steps of receiving the solution from the quantum processor. The solution comprises spin states of each spin corresponding to an outcome of performing a quantum computation on the quantum processor to minimise the Hamiltonian energy representing an optimisation objective function of the spins. The method further comprises determining a test spin-group in the solution; determining changes to the Hamiltonian energy of the solution for alternative test spin-group states; and upon determining that at least one change reduces the energy of the solution, determining target spin-groups, and flipping the target spin-group to an alternative target spin-group state to mitigate the error in the solution.

The invention provides a quantum error mitigation neural network training method based on physical prior structure guidance, which can be applied to the technical field of quantum information processing and quantum machine learning. The method comprises the steps that real amplitude random distribution operation and standardization operation are sequentially carried out on calculation ground states meeting the even number of Hamming weights, and quantum circuit input data are obtained; based on a one-dimensional transverse field Ising model, designing a parameterized quantum circuit through Trotter decomposition operation to obtain a quantum circuit with a structure evolvable function; performing output sampling under multiple measurement bases on a processing result of the quantum circuit on the input data of the quantum circuit to obtain noise-free training output data and noise-containing training output data which have a pairing relationship; and taking the noise-free training output data as a training label, training the quantum error mitigation neural network by using the noise-containing training output data, and obtaining an error mitigation mapping relation of the target quantum circuit by using the trained quantum error mitigation neural network.

A method, apparatus and computer program product provide for error mitigation in an inertial navigation system (INS) based upon centripetal acceleration experienced by a vehicle that carries the INS. In the context of a method, the centripetal acceleration experienced by a vehicle carrying the INS that is making a turn is determined. The method also includes determining a velocity of the vehicle in reliance upon the centripetal acceleration. Based on the velocity determined in reliance upon the centripetal acceleration, the method further includes updating one or more filters of the INS to correct a velocity estimate provided by the INS.

The invention provides a quantum error mitigation method based on unitary gate design combined with a Fouli channel Z mixed expression, and the method comprises the steps: carrying out the unitary gate design of a quantum gate in a quantum circuit, and then combining with the Fouli channel Z mixed expression to alleviate the quantum gate and a measurement error. According to the method, the unitary gate design is combined with the Z mixed expression of the Fouli channel, the quantum gate noise and the measurement noise can be relieved at the same time, any quantum gate noise can be equivalently converted into a depolarization channel through the unitary gate design, the limitation of a traditional method on the noise type is avoided, the application range is wider, and the method is easy to implement. The method can be effectively operated under a more generalized noise model; compared with zero-noise extrapolation and other methods, the method does not depend on a large number of noise amplification experiments and complex fitting, and parameter estimation can be completed only through a small amount of auxiliary measurement; the invention provides a more generalized noise channel mitigation scheme for the quantum error mitigation field.

This application discloses an error mitigation method and related apparatus, relating to the field of quantum computing technology. Upon detecting a first quantum computing task, at least one preset error correction method can be displayed for the user to select based on relevant information about the first quantum computing task. The user can then correct the running result of the quantum computing task according to the selected error correction method. This method allows for more flexible correction of quantum computing tasks by displaying at least one preset error correction method based on relevant information, and the user can also choose a suitable error correction method according to the actual scenario. This approach helps to more accurately correct the running result of the quantum computing task.