Related Experiment Video
Updated: Jul 21, 2025

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
Published on: May 30, 2014
Quantum Information Entropy for a Hyperbolic Double Well Potential in the Fractional Schrödinger Equation
R Santana-Carrillo1, J M Velázquez Peto2, Guo-Hua Sun1
1Centro de Investigación en Computación, Instituto Politécnico Nacional, UPALM, Mexico City 07700, Mexico.
This study explores Shannon entropy in the fractional Schrödinger equation for a hyperbolic double well potential. Decreasing fractional derivative localizes position entropy while delocalizing momentum entropy, with their sum increasing.
Area of Science:
- Quantum Mechanics
- Mathematical Physics
Background:
- The fractional Schrödinger equation (FSE) extends quantum mechanics using fractional calculus.
- The hyperbolic double well potential (HDWP) presents complex quantum behavior.
- Shannon entropy quantifies uncertainty in quantum systems.
Purpose of the Study:
- Investigate position and momentum Shannon entropy (Sx, Sp) in FSE with HDWP.
- Analyze the influence of fractional derivative order (k) on entropy properties.
- Examine the relationship between entropy, potential depth (u), and the BBM inequality.
Main Methods:
- Solving the FSE numerically for various fractional orders (k) and potential depths (u).
- Calculating position and momentum Shannon entropy densities (ρs(x), ρs(p)).
- Analyzing entropy localization and delocalization trends.
Main Results:
- Decreasing fractional derivative (k) localizes position entropy density (ρs(x)) and delocalizes momentum entropy density (ρs(p)).
- Position entropy (Sx) decreases while momentum entropy (Sp) increases with decreasing k.
- The sum of entropies (Sx + Sp) increases as k decreases.
- The Beckner-Bialynicki-Birula-Mycielski (BBM) inequality holds despite changes in Sx, Sp, and potential depth (u).
- Fisher entropy increases with HDWP depth (u) and decreasing fractional derivative (k).
Conclusions:
- Fractional order significantly impacts quantum system uncertainty and localization.
- The HDWP system in fractional quantum mechanics exhibits unique entropic behaviors.
- The BBM inequality provides a fundamental constraint on quantum information in these systems.
More Related Videos
00:07A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
Published on: September 5, 2019
09:23Quantification of Information Encoded by Gene Expression Levels During Lifespan Modulation Under Broad-range Dietary Restriction in C. elegans
Published on: August 16, 2017
Related Concept Videos
Entropy
Entropy and the Second Law of Thermodynamics
The relation between entropy and disorder can be illustrated with the example of the phase change of ice to water. In ice, the molecules are located at specific sites giving a solid state, whereas, in a liquid form, these molecules are much freer to move. The molecular arrangement has therefore become more randomized. Although the change in average...
The Quantum-Mechanical Model of an Atom
Third Law of Thermodynamics
The Uncertainty Principle
Thermodynamic Potentials