Direct state measurements under state-preparation-and-measurement errors
- URL: http://arxiv.org/abs/2007.05294v2
- Date: Wed, 26 May 2021 00:38:50 GMT
- Title: Direct state measurements under state-preparation-and-measurement errors
- Authors: Kieu Quang Tuan, Hung Q. Nguyen, Le Bin Ho
- Abstract summary: We investigate the measurement precision that undergoes the state-preparation-and-measurement errors.
Our study could provide a reliable tool for SPAM errors tomography and contribute to understanding and resolving an urgent demand for current quantum technologies.
- Score: 0.0
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: Direct state measurement (DSM) is a tomography method that allows for
retrieving quantum states' wave functions directly. However, a shortcoming of
current studies on the DSM is that it does not provide access to noisy quantum
systems. Here, we attempt to fill the gap by investigating the DSM measurement
precision that undergoes the state-preparation-and-measurement (SPAM) errors.
We manipulate a quantum controlled measurement framework with various
configurations and compare the efficiency between them. Under such SPAM errors,
the state to be measured lightly deviates from the true state, and the
measurement error in the postselection process results in less accurate in the
tomography. Our study could provide a reliable tool for SPAM errors tomography
and contribute to understanding and resolving an urgent demand for current
quantum technologies.
Related papers
- Measurement-device agnostic quantum tomography [0.0]
We show that a mismatch between actual and assumed constituent measurements limits the accuracy of this characterization.
We use these artifacts to detect and quantify the mismatch and gain information about the actual measurement operators.
arXiv Detail & Related papers (2024-07-17T21:04:16Z) - Efficient separate quantification of state preparation errors and
measurement errors on quantum computers and their mitigation [0.5439020425819]
Current noisy quantum computers have multiple types of errors, which can occur in the state preparation, measurement/readout, and gate operation.
We propose a simple and resource-efficient approach to quantify separately the state preparation and readout error rates.
arXiv Detail & Related papers (2023-10-29T02:51:06Z) - Measurement-induced entanglement and teleportation on a noisy quantum
processor [105.44548669906976]
We investigate measurement-induced quantum information phases on up to 70 superconducting qubits.
We use a duality mapping, to avoid mid-circuit measurement and access different manifestations of the underlying phases.
Our work demonstrates an approach to realize measurement-induced physics at scales that are at the limits of current NISQ processors.
arXiv Detail & Related papers (2023-03-08T18:41:53Z) - Quantum state tomography with tensor train cross approximation [84.59270977313619]
We show that full quantum state tomography can be performed for such a state with a minimal number of measurement settings.
Our method requires exponentially fewer state copies than the best known tomography method for unstructured states and local measurements.
arXiv Detail & Related papers (2022-07-13T17:56:28Z) - Measurement based estimator scheme for continuous quantum error
correction [52.77024349608834]
Canonical discrete quantum error correction (DQEC) schemes use projective von Neumann measurements on stabilizers to discretize the error syndromes into a finite set.
Quantum error correction (QEC) based on continuous measurement, known as continuous quantum error correction (CQEC), can be executed faster than DQEC and can also be resource efficient.
We show that by constructing a measurement-based estimator (MBE) of the logical qubit to be protected, it is possible to accurately track the errors occurring on the physical qubits in real time.
arXiv Detail & Related papers (2022-03-25T09:07:18Z) - Algorithmic cooling for resolving state preparation and measurement
errors in quantum computing [0.0]
We propose a novel type of algorithmic cooling protocol called measurement-based algorithmic cooling (MBAC)
MBAC assumes the ability to perform (potentially imperfect) projective measurements on individual qubits.
We demonstrate that MBAC can significantly reduce state preparation error under realistic assumptions.
arXiv Detail & Related papers (2022-03-15T17:41:58Z) - Measuring NISQ Gate-Based Qubit Stability Using a 1+1 Field Theory and
Cycle Benchmarking [50.8020641352841]
We study coherent errors on a quantum hardware platform using a transverse field Ising model Hamiltonian as a sample user application.
We identify inter-day and intra-day qubit calibration drift and the impacts of quantum circuit placement on groups of qubits in different physical locations on the processor.
This paper also discusses how these measurements can provide a better understanding of these types of errors and how they may improve efforts to validate the accuracy of quantum computations.
arXiv Detail & Related papers (2022-01-08T23:12:55Z) - Conditionally rigorous mitigation of multiqubit measurement errors [0.0]
measurement errors are significantly larger than gate errors on some platforms.
We develop a measurement error mitigation technique, conditionally rigorous TMEM, that is not sensitive to state-preparation errors.
arXiv Detail & Related papers (2021-09-09T17:49:13Z) - Performance of teleportation-based error correction circuits for bosonic
codes with noisy measurements [58.720142291102135]
We analyze the error-correction capabilities of rotation-symmetric codes using a teleportation-based error-correction circuit.
We find that with the currently achievable measurement efficiencies in microwave optics, bosonic rotation codes undergo a substantial decrease in their break-even potential.
arXiv Detail & Related papers (2021-08-02T16:12:13Z) - Quantum tomography of noisy ion-based qudits [0.0]
We show that it is possible to construct a quantum measurement protocol that contains no more than a single quantum operation in each measurement circuit.
The measures described can significantly improve the accuracy of quantum tomography of real ion-based qudits.
arXiv Detail & Related papers (2020-11-09T04:10:32Z) - Scalable quantum processor noise characterization [57.57666052437813]
We present a scalable way to construct approximate MFMs for many-qubit devices based on cumulant expansion.
Our method can also be used to characterize various types of correlation error.
arXiv Detail & Related papers (2020-06-02T17:39:42Z)
This list is automatically generated from the titles and abstracts of the papers in this site.
This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.