Related Experiment Video
Updated: Sep 6, 2025
09:23
Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
Published on: May 30, 2014
14.6K
Retrieving High-Dimensional Quantum Steering from a Noisy Environment with N Measurement Settings
Rui Qu1, Yunlong Wang1,2, Min An1
1MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, School of Physics, Xi'an Jiaotong University, Xi'an 710049, China.
Physical Review Letters
|July 1, 2022
Summary
High-dimensional quantum steering demonstrates enhanced correlations and noise robustness. This research shows increased violation of steering inequalities, paving the way for practical quantum information processing.
Area of Science:
- Quantum Information Science
- Quantum Foundations
- Experimental Quantum Physics
Background:
- High-dimensional (HD) quantum systems offer potential for stronger correlations and noise resilience.
- Quantum steering is a key phenomenon in quantum foundations and information processing.
- Existing steering criteria often rely on low-dimensional systems and are susceptible to noise.
Purpose of the Study:
- To experimentally demonstrate the n-setting linear HD quantum steering criterion.
- To quantify the violation of steering inequalities in high dimensions.
- To investigate methods for enhancing noise robustness in quantum steering.
Main Methods:
- Experimental implementation of the n-setting linear HD quantum steering criterion.
- Verification of steering inequalities violation without full-state tomography.
- Utilizing 11-dimensional entangled states for steering demonstrations.
Main Results:
- Demonstrated a large violation of steering inequalities in 11 dimensions, with a lower bound of 2.24±0.01, exceeding the bound for two-setting criteria.
- Showcased a method to enhance noise robustness by increasing measurement settings, not dimensions.
- Experimentally retrieved steering nonlocality with a 63.4±1.4% isotropic noise fraction, surpassing the 50% limit of two-setting criteria.
Conclusions:
- HD quantum steering exhibits a higher strength of correlation and improved noise resilience compared to lower-dimensional systems.
- Increasing measurement settings offers an alternative strategy for enhancing noise robustness in quantum steering.
- The findings support the potential for practical one-sided device-independent quantum information processing in noisy environments.
Related Concept Videos
01:10Interpreting ¹H NMR Signal Splitting: The (n + 1) Rule
1.4K
In the AX proton spin system, proton A can sense the two spin states of a coupled proton X, resulting in a doublet NMR signal with two peaks of equal (1:1) intensity. When proton A is coupled to two equivalent protons (AX2 spin system), the spin states of each X can be aligned with or against the external field, creating three possible scenarios. This results in a 1:2:1 triplet signal, where the central peak corresponds to the chemical shift of A and is twice as large or intense as the...
1.4K
01:14NMR Spectrometers: Resolution and Error Correction
773
When magnetic nuclei in a sample achieve resonance and undergo relaxation, the signal detected in NMR is an approximately exponential free induction decay. Fourier transform of an exponential decay yields a Lorentzian peak in the frequency domain. Lorentzian peaks in an NMR spectrum are defined by their amplitude, full width at half maximum, and position, where the peak width is governed by the spin-spin relaxation time alone. In real experiments, however, the applied magnetic field is rendered...
773
02:46Uncertainty in Measurement: Reading Instruments
41.9K
Counting is the type of measurement that is free from uncertainty, provided the number of objects being counted does not change during the process. Such measurements result in exact numbers. By counting the eggs in a carton, for instance, one can determine exactly how many eggs are there in the carton. Similarly, the numbers of defined quantities are also exact. For example, 1 foot is exactly 12 inches, 1 inch is exactly 2.54 centimeters, and 1 gram is exactly 0.001 kilograms. Quantities...
41.9K
01:192D NMR: Heteronuclear Single-Quantum Correlation Spectroscopy (HSQC)
886
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...
886
01:182D NMR: Overview of Heteronuclear Correlation Techniques
294
Heteronuclear correlation spectroscopy is an analytical technique that investigates the coupling between different types of nuclei, often a proton and an X-nucleus, such as carbon-13 or nitrogen-15. This method is commonly used in nuclear magnetic resonance (NMR) spectroscopy to gain insights into complex chemical compounds' structural and compositional aspects. A typical heteronuclear correlation spectrum displays X-nucleus chemical shifts on one axis and a proton spectrum on the other...
294
01:02¹H NMR: Interpreting Distorted and Overlapping Signals
1.1K
Spin systems where the difference in chemical shifts of the coupled nuclei is greater than ten times J are called first-order spin systems. These nuclei are weakly coupled, and their chemical shifts and coupling constant can generally be estimated from the well-separated signals in the spectrum.
As Δν decreases and the signals move closer, the doublets appear increasingly distorted. The intensities of the inner lines increase at the cost of those of the outer lines as the signals are...
As Δν decreases and the signals move closer, the doublets appear increasingly distorted. The intensities of the inner lines increase at the cost of those of the outer lines as the signals are...
1.1K