Related Experiment Video
Updated: Aug 10, 2026

Generation and Coherent Control of Pulsed Quantum Frequency Combs
Published on: June 8, 2018
Coherence measure in hamiltonian systems with many degrees of freedom
D'Alessandro1, D'Aquino, Tenenbaum
1Physics Department, University of Perugia, Via A. Pascoli 1, 06100 Perugia, Italy.
Abstract:
We study the phase space region of two- and three-dimensional lattices where a transition from chaotic to ordered dynamics takes place when the energy is lowered. In this region we find coexistence of degrees of freedom (DOF's), endowed with different levels of chaos. The analysis of this complex dynamical pattern requires the introduction of diagnostic tools suitable for a characterization of single DOF's: coherence angles and coherence times. We find that the coherence times-which give a measure of the time each DOF needs to relax to equilibrium-are roughly proportional to the inverse of the specific energy. This may be useful to evaluate the reliability of statistical results obtained in computer experiments performed on condensed matter systems at low energy.
More Related Videos
08:04Excitonic Hamiltonians for Calculating Optical Absorption Spectra and Optoelectronic Properties of Molecular Aggregates and Solids
Published on: May 27, 2020
05:59New Framework for Understanding Cross-Brain Coherence in Functional Near-Infrared Spectroscopy (fNIRS) Hyperscanning Studies
Published on: October 6, 2023
Related Concept Videos
Stability of Equilibrium Configuration
A stable equilibrium occurs when a system tends to return to its original position when given a small displacement, and the potential energy is at its minimum. An example of a stable equilibrium is when a cantilever beam is fixed at one end and a weight is attached to the other end. If the weight...
One-Degree-of-Freedom System
A one-degree-of-freedom system is defined by an independent variable that determines its state and behavior. One example of a one-degree-of-freedom system is a simple harmonic oscillator, such as a...
Stability of Equilibrium Configuration: Problem Solving
Problem-solving in the context of the stability of equilibrium configuration...
Equation of Rotational Dynamics
Conservation of Linear Momentum for a System of Particles
The impulsive force at play during this interaction is of extremely short duration, rendering its impulse negligible. When...
Classical Mechanics