Absolute surface metrology by shear rotation with position error correction
نویسندگان
چکیده
منابع مشابه
Quantum error correction for metrology.
We propose and analyze a new approach based on quantum error correction (QEC) to improve quantum metrology in the presence of noise. We identify the conditions under which QEC allows one to improve the signal-to-noise ratio in quantum-limited measurements, and we demonstrate that it enables, in certain situations, Heisenberg-limited sensitivity. We discuss specific applications to nanoscale sen...
متن کاملPhase Error Correction by Shear Averaging
Synthetic aperture radar (SAR) [1,2] (and other imaging systems) measures the complex Fourier transform (called the signal history or phase history) of the scene being imaged, but it often suffers from one-dimensional (1-D) phase errors due to unknown system platform motion, target motion, system phase instabilities, and propagation through atmospheric turbulence. If uncorrected, these phase er...
متن کاملSurface metrology
Some important types of instrumentation for measuring surfaces both past and present are reviewed. Exhaustive lists of instruments and performance are not presented; rather more emphasis is placed on the philosophy of measurement. An attempt is made to classify the surface features and also the function of surfaces as a pre-requisite to measurement. It is revealed that, as the push towards mini...
متن کاملEvaluation of Rotation Correction Techniques for Electromagnetic Position Tracking Systems
Electromagnetic position tracking devices are an integral part of many modern virtual reality systems. However, they have an inherent accuracy problem due to the dependence on the local electromagnetic field that can be easily distorted by a presence of magnetically active elements near the tracker’s transmitter or receiver. Several analytical techniques have been proposed to overcome this limi...
متن کاملUniversal Collective Rotation Channels and Quantum Error Correction
We present and investigate a new class of quantum channels, what we call ‘universal collective rotation channels’, that includes the class of collective rotation channels as a special case. The fixed point set and noise commutant coincide for a channel in this class. Computing the precise structure of this C∗-algebra is a core problem in a particular noiseless subsystem method of quantum error ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of the European Optical Society-Rapid Publications
سال: 2017
ISSN: 1990-2573
DOI: 10.1186/s41476-016-0032-6