Related Experiment Video
Updated: Nov 9, 2025

Generation and Coherent Control of Pulsed Quantum Frequency Combs
Published on: June 8, 2018
Quantum chaos and the correspondence principle.
Jiaozi Wang1,2, Giuliano Benenti3,4,5, Giulio Casati3,6
1Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China.
The correspondence principle in quantum mechanics is restored by properly treating singular points, even when observing early-time exponential increases in out-of-time-ordered correlators (OTOCs). The OTOC remains a key indicator of chaotic dynamics.
Area of Science:
- Quantum mechanics
- Quantum chaos
- Statistical mechanics
Background:
- The correspondence principle is fundamental to quantum mechanics, linking quantum theory to classical physics.
- Recent observations of early-time exponential increases in out-of-time-ordered correlators (OTOCs) in nonchaotic systems have challenged this principle.
Purpose of the Study:
- To investigate the validity of the correspondence principle in light of new OTOC observations.
- To demonstrate that the correspondence principle is restored through a refined mathematical treatment.
Main Methods:
- Analysis of singular points in the mathematical framework.
- Theoretical treatment of out-of-time-ordered correlators (OTOCs).
Main Results:
- The correspondence principle is re-established after a proper handling of singular points.
- The out-of-time-ordered correlator (OTOC) is confirmed as a reliable diagnostic tool for chaotic dynamics.
Conclusions:
- The apparent challenge to the correspondence principle is resolved by addressing mathematical singularities.
- The OTOC's utility in identifying chaotic behavior is preserved and validated.
Related Concept Videos
The Uncertainty Principle
The Quantum-Mechanical Model of an Atom
The de Broglie Wavelength
The Pauli Exclusion Principle
First Law: Particles in One-dimensional Equilibrium
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...

