Related Experiment Video
Updated: Oct 12, 2025
![Measuring the Spin-Lattice Relaxation Magnetic Field Dependence of Hyperpolarized [1-13C]pyruvate](/_next/image?url=https%3A%2F%2Fcloudfront.jove.com%2FCDNSource%2Fteasers%2F59399.jpg&w=3840&q=50)
Measuring the Spin-Lattice Relaxation Magnetic Field Dependence of Hyperpolarized [1-13C]pyruvate
Published on: September 13, 2019
Suppressing measurement uncertainty in an inhomogeneous spin star system
Saeed Haddadi1, Mehrdad Ghominejad2, Ahmad Akhound3
1Faculty of Physics, Semnan University, P.O.Box 35195-363, Semnan, Iran.
We explored the entropic uncertainty bound in a quantum system with memory. Adjusting system inhomogeneity can control and reduce this uncertainty bound, offering insights into quantum predictions.
Area of Science:
- Quantum Mechanics
- Quantum Information Theory
Background:
- The uncertainty principle is a cornerstone of quantum mechanics, defining limits on predicting measurement outcomes for incompatible observables.
- Entropic uncertainty relations quantify these limits using information-theoretic measures.
Purpose of the Study:
- To investigate the thermal evolution of the entropic uncertainty bound.
- To analyze the impact of quantum memory on this bound.
- To study an inhomogeneous four-qubit spin-star system in a thermal environment.
Main Methods:
- Utilizing theoretical analysis of quantum systems.
- Examining the dynamics of an inhomogeneous four-qubit spin-star model.
- Considering the influence of thermal bath and quantum memory effects.
Main Results:
- The entropic uncertainty bound exhibits thermal evolution.
- Quantum memory plays a role in modifying the uncertainty bound.
- System inhomogeneity is shown to be a key factor in controlling the bound.
Conclusions:
- The entropic uncertainty bound in the studied system is tunable.
- Adjusting the inhomogeneity parameter offers a method to suppress the uncertainty bound.
- Findings contribute to understanding quantum uncertainty in complex systems with memory.
More Related Videos
Related Concept Videos
¹H NMR: Interpreting Distorted and Overlapping Signals
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...
Spin–Spin Coupling Constant: Overview
Qualitatively, any spin plus-half nucleus polarizes the spins of its electrons to the minus-half state. Consequently, the paired electron in the hydrogen–carbon bond must...
Propagation of Uncertainty from Systematic Error
Atomic Nuclei: Nuclear Spin State Population Distribution
Uncertainty in Measurement: Reading Instruments
Atomic Nuclei: Nuclear Relaxation Processes

