Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Quantum Numbers

Quantum Numbers

It is said that the energy of an electron in an atom is quantized; that is, it can be equal only to certain specific values and can jump from one energy level to another but not transition smoothly or stay between these levels.

Uncertainty in Measurement: Accuracy and Precision

Uncertainty in Measurement: Accuracy and Precision

Scientists typically make repeated measurements of a quantity to ensure the quality of their findings and to evaluate both the precision and the accuracy of their results. Measurements are said to be precise if they yield very similar results when repeated in the same manner. A measurement is considered accurate if it yields a result that is very close to the true or the accepted value. Precise values agree with each other; accurate values agree with a true value.

The Quantum-Mechanical Model of an Atom

The Quantum-Mechanical Model of an Atom

Shortly after de Broglie published his ideas that the electron in a hydrogen atom could be better thought of as being a circular standing wave instead of a particle moving in quantized circular orbits, Erwin Schrödinger extended de Broglie’s work by deriving what is now known as the Schrödinger equation. When Schrödinger applied his equation to hydrogen-like atoms, he was able to reproduce Bohr’s expression for the energy and, thus, the Rydberg formula governing hydrogen spectra.

Accuracy and Precision

Accuracy and Precision

Scientists typically make repeated measurements of a quantity to ensure the quality of their findings and to evaluate both the precision and the accuracy of their results. Measurements are said to be precise if they yield very similar results when repeated in the same manner. A measurement is considered accurate if it yields a result that is very close to the true or the accepted value. Precise values agree with each other; accurate values agree with a true value. Highly accurate...

Uncertainty in Measurement: Significant Figures

Uncertainty in Measurement: Significant Figures

All the digits in a measurement, including the uncertain last digit, are called significant figures or significant digits. Note that zero may be a measured value; for example, if a scale that shows weight to the nearest pound reads “140,” then the 1 (hundreds), 4 (tens), and 0 (ones) are all significant (measured) values.

2D NMR: Heteronuclear Single-Quantum Correlation Spectroscopy (HSQC)

2D NMR: Heteronuclear Single-Quantum Correlation Spectroscopy (HSQC)

Heteronuclear single-quantum correlation spectroscopy (HSQC) is a 2D NMR technique that reveals one-bond correlations between hydrogen and a heteronucleus. The HSQC experiment is similar to the heteronuclear correlation experiment (HETCOR) but is more sensitive. In the HSQC spectrum, the proton chemical shift is plotted on the horizontal F2 axis, while the 13C chemical shift is plotted on the vertical F1 axis. The corresponding proton and 13C spectra are also shown. The HSQC contour plot does...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Generation of reconfigurable hypercubic graph states in one to four dimensions in a simple optical system.

Science advances·2026

Same author

Transfer and beyond: emerging strategies and trends in two-dimensional material device fabrication.

Chemical Society reviews·2026

Same author

Counter-propagating entangled photon pairs from monolayer GaSe.

Nature communications·2025

Same author

Dual Open Atom Interferometry for Compact and Mobile Quantum Sensing.

Physical review letters·2025

Same author

Quasi-phase-matching enabled by van der Waals stacking.

Nature communications·2024

Same author

Mapping Guaranteed Positive Secret Key Rates for Continuous Variable Quantum Key Distribution.

Entropy (Basel, Switzerland)·2024

Same journal

Plasmonic nanocomposite helices for weather-adaptive LiDAR function.

Nature communications·2026

Same journal

Multidirectional strain-insensitive stretchable RF electronics.

Nature communications·2026

Same journal

In-scanner thoughts contribute to resting-state functional connectivity.

Nature communications·2026

Same journal

Metal-center electron affinity modulates multicolor electrochromism in 2D conjugated metal-organic frameworks.

Nature communications·2026

Same journal

Hyperbranched dielectric polymer networks exhibiting giant energy storage density at 250 °C.

Nature communications·2026

Same journal

3D nanoprinting of metals by spatiotemporally confined hot electrons via multiple-electron excitations in nanocrystals.

Nature communications·2026

See all related articles

Search research articles

Home
Precision Bounds For Characterising Quantum Measurements.

Home
Precision Bounds For Characterising Quantum Measurements.

Related Experiment Video

Absolute Quantum Yield Measurement of Powder Samples

Absolute Quantum Yield Measurement of Powder Samples

Published on: May 12, 2012

Precision bounds for characterising quantum measurements.

Aritra Das¹, Simon K Yung², Lorcán O Conlon^3,4

¹Centre for Quantum Computation and Communication Technology, Department of Quantum Science and Technology, Australian National University, Canberra, ACT, Australia. dasaritra.das98@gmail.com.

Nature Communications

|January 20, 2026

View abstract on PubMed

Summary

This summary is machine-generated.

We developed a new framework for efficient quantum detector estimation, establishing fundamental limits on parameter information and errors. This advances quantum information theory and calibration for quantum technologies.

More Related Videos

Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source

Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source

Published on: April 4, 2017

Gradient Echo Quantum Memory in Warm Atomic Vapor

Gradient Echo Quantum Memory in Warm Atomic Vapor

Published on: November 11, 2013

Related Experiment Videos

Absolute Quantum Yield Measurement of Powder Samples

Absolute Quantum Yield Measurement of Powder Samples

Published on: May 12, 2012

Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source

Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source

Published on: April 4, 2017

Gradient Echo Quantum Memory in Warm Atomic Vapor

Gradient Echo Quantum Memory in Warm Atomic Vapor

Published on: November 11, 2013

Area of Science:

Quantum Information Science
Quantum Metrology
Quantum Measurement Theory

Background:

Quantum information processing relies on understanding quantum states, processes, and measurements.
Efficient characterization of quantum detectors is less explored compared to states and processes.

Purpose of the Study:

To introduce a comprehensive framework for efficient quantum detector estimation.
To reveal fundamental limits on extractable parameter information and errors in detector analysis.
To complete the theoretical triad of quantum state, process, and detector tomography.

Main Methods:

Development of the detector quantum Fisher information.
Theoretical proofs and examples.
Experimental validation on current quantum detector technologies.

Main Results:

A novel framework for efficient detector estimation.
Identification of fundamental limits and errors in detector analysis.
Demonstration of the framework's relevance and robustness for quantum technologies.

Conclusions:

The proposed framework resolves the asymmetry in quantum information characterization.
It provides a dual perspective to quantum state estimation.
Advances quantum information theory and supports emerging technologies requiring precise measurements.