Related Experiment Videos
Is semiquantum chaos real?
1Department of Physics, Simon Fraser University, Burnaby, British Columbia, Canada V5A 1S6.
Summary
Dynamical chaos in semiquantum systems may not be real, disappearing as the system becomes more classical. Increasing oscillator mass shows semiquantum chaos vanishes, suggesting it
Area of Science:
- Quantum mechanics and classical dynamics
- Chaos theory
- Semiquantum systems
Background:
- Semiquantum systems, with both quantum and classical components, can display dynamical chaos.
- The physical reality of this chaos, versus it being an artifact of approximation, is debated.
Purpose of the Study:
- To investigate the physical reality of dynamical chaos in semiquantum systems.
- To determine if semiquantum chaos is an artifact of the approximation used.
Main Methods:
- A model of a quantum spin coupled to a nonlinear oscillator was used.
- The mass of the oscillator was systematically increased to approach classical behavior.
Main Results:
- Semiquantum chaos rapidly disappears as the oscillator's mass increases, making it more classical.
- The duration of the semiquantum approximation's accuracy increases with mass.
- This accuracy interval is not strongly correlated with Lyapunov time.
Conclusions:
- The observed semiquantum chaos is likely an artifact of the approximation.
- The transition to classicality suppresses the chaotic dynamics observed in the semiquantum regime.