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Spatial instabilities in a cloud of cold atoms.
Rudy Romain1, Antoine Jallageas1, Philippe Verkerk1
1Université Lille, CNRS, UMR 8523-PhLAM-Physique des Lasers Atomes et Molécules, 59000 Lille, France.
Physical Review. E
|December 15, 2016
Summary
This study reveals that stochastic instabilities in cold atomic clouds are localized in space. The research demonstrates that space and time are inseparable in describing these dynamics.
Area of Science:
- Atomic Physics
- Plasma Physics
- Quantum Gases
Background:
- Cold atomic clouds share similarities with plasmas.
- Previous research identified long-range interactions causing instabilities in these clouds.
- The spatial characteristics of these dynamics remained undescribed.
Purpose of the Study:
- To experimentally investigate the spatial properties of stochastic instabilities in cold atomic clouds.
- To determine if the observed dynamics are localized or extended.
- To explore the separability of space and time in describing these phenomena.
Main Methods:
- Experimental study of cold atomic clouds.
- Analysis of dynamics in both spectral and spatial domains.
- Application of Principal Component Analysis (PCA) for spatial data analysis.
Main Results:
- Experimental evidence shows that the dynamics of stochastic instabilities are localized.
- Analysis in both spectral and spatial domains failed to describe dynamics using separable eigenmodes.
- The findings indicate a non-separable relationship between space and time.
Conclusions:
- Stochastic instabilities in cold atomic clouds exhibit localized spatial behavior.
- The dynamics are characterized by a non-separable coupling of space and time.
- This challenges traditional descriptions based on separable modes.
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