Related Experiment Video
Updated: Feb 10, 2026
11:45
Experimental Methods for Trapping Ions Using Microfabricated Surface Ion Traps
Published on: August 17, 2017
15.3K
Sustained State-Independent Quantum Contextual Correlations from a Single Ion.
F M Leupold1, M Malinowski1, C Zhang1
1Institute for Quantum Electronics, ETH Zürich, Otto-Stern-Weg 1, 8093 Zürich, Switzerland.
Physical Review Letters
|May 19, 2018
Summary
This study demonstrates quantum physics
Area of Science:
- Quantum Information Science
- Quantum Foundations
Background:
- Quantum mechanics exhibits nonclassical correlations.
- Noncontextuality is a key principle distinguishing quantum from classical physics.
Purpose of the Study:
- To demonstrate quantum-state-independent violation of noncontextuality inequalities.
- To characterize experimental imperfections and constrain hidden-variable models.
Main Methods:
- Utilized a single trapped-ion qutrit system.
- Performed 53 million sequential quantum nondemolition projective measurements of 13 observables.
- Employed a real-time quantum random number generator for observable selection.
Main Results:
- Unambiguously violated an optimal noncontextual bound.
- Characterized measurement signaling and repeatability.
- Demonstrated state-recycling procedure resilience to noise.
Conclusions:
- Quantum contextuality is linked to measurements, not specific states.
- Extended quantum nondemolition measurements have applications in sensing and quantum information.
Related Concept Videos
01:192D NMR: Heteronuclear Single-Quantum Correlation Spectroscopy (HSQC)
1.5K
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...
1.5K
02:43Quantum Numbers
52.1K
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.
52.1K
01:43Sustainable Development
15.2K
As the human population continues to grow and use resources, we must be mindful of our planet’s natural limits. Sustainable development provides a pathway to maintain and improve human life now while also ensuring that future generations will have the resources that they need. The long-term success of sustainability efforts rests on understanding the interplay between human actions and ecological systems.
15.2K
01:27Correlation and Causation
42.9K
Statistical tests can calculate whether there is a relationship, or correlation, between independent and dependent variables. An indirect relationship of the variables signifies a correlation, while a direct relationship shows causation. If it is determined that no connection exists between the variables, then the correlation is a coincidence.
Correlation versus Causation
If the dependent variable increases or decreases when the independent variable increases, there is a positive or negative...
Correlation versus Causation
If the dependent variable increases or decreases when the independent variable increases, there is a positive or negative...
42.9K
02:45The Quantum-Mechanical Model of an Atom
59.5K
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.
59.5K
02:20Correlations
36.5K
Correlation means that there is a relationship between two or more variables (such as ice cream consumption and crime), but this relationship does not necessarily imply cause and effect. When two variables are correlated, it simply means that as one variable changes, so does the other. We can measure correlation by calculating a statistic known as a correlation coefficient. A correlation coefficient is a number from -1 to +1 that indicates the strength and direction of the relationship between...
36.5K