Errors in quantum tomography: diagnosing systematic versus statistical errors

Errors in quantum tomography: diagnosing systematic versus statistical errors

A prime goal of quantum tomography is to provide quantitatively rigorous characterization of quantum systems, be they states, processes or measurements, particularly for the purposes of trouble-shooting and benchmarking experiments in quantum information science. A range of techniques exist to enable the calculation of errors, such as Monte-Carlo simulations, but their quantitative value is arg...

Systematic errors in current quantum state tomography tools.

Common tools for obtaining physical density matrices in experimental quantum state tomography are shown here to cause systematic errors. For example, using maximum likelihood or least squares optimization to obtain physical estimates for the quantum state, we observe a systematic underestimation of the fidelity and an overestimation of entanglement. Such strongly biased estimates can be avoided...

Medical errors in Iranian hospitals: systematic review

Background: Medical errors are those errors or mistakes committed by healthcare professionals due to errors of omission, errors in planning, and errors of execution of a planned healthcare action whether or not it is harmful to the patient. Medical error in hospitals increases morbidity and mortality and decreases patient satisfaction and hospital productivity. This study aimed to determine the...

Diagnosing and Correcting Systematic Errors in Spectral-Based Digital Imaging

A digital imaging system containing a calibration target, an image capture device, and a mathematical model to estimate spectral reflectance factor was treated as a spectrophotometer and as such subject to systematic and random errors. The systematic errors considered were photometric zero, photometric linear and nonlinear scale, wavelength linear and nonlinear scale, and bandwidth. To diagnose...

Diagnosing Meaning Errors in ICALL