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Updated: Oct 20, 2025

An Analog Macroscopic Technique for Studying Molecular Hydrodynamic Processes in Dense Gases and Liquids
Published on: December 4, 2017
Generalized hydrodynamics in strongly interacting 1D Bose gases
Neel Malvania1, Yicheng Zhang1, Yuan Le1
1Department of Physics, The Pennsylvania State University, University Park, PA 16802, USA.
Generalized hydrodynamics (GHD) accurately simulates complex quantum systems. Experiments with ultracold Bose gases confirm GHD
Area of Science:
- Quantum physics
- Many-body systems
- Ultracold atomic gases
Background:
- Simulating strongly interacting many-body quantum systems is challenging.
- Generalized hydrodynamics (GHD) offers efficient simulations for nearly integrable systems.
Purpose of the Study:
- To experimentally validate generalized hydrodynamics (GHD) for simulating quantum dynamics.
- To test GHD's accuracy in one-dimensional Bose gases under varying coupling strengths.
Main Methods:
- Performed large trap quenches on ultracold one-dimensional Bose gases.
- Investigated systems in both strong and intermediate coupling regimes.
- Compared experimental results with GHD predictions.
Main Results:
- GHD theory and experimental results showed strong agreement.
- Accuracy was maintained over dozens of trap oscillations.
- Effective for coupling strengths ranging from 0.3 to 9.3.
Conclusions:
- Generalized hydrodynamics accurately describes quantum dynamics in experimental 1D nearly integrable systems.
- GHD is effective even with low particle numbers and rapid density changes.
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