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Updated: Sep 8, 2025
11:21
Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving
Published on: March 30, 2017
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Tagged particle dynamics in supercooled quantum liquids.
Ankita Das1, Gopika Krishnan1, Eran Rabani2,3
1Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore 560012, India.
Physical Review. E
|June 16, 2022
Summary
Quantum effects alter supercooled liquid dynamics. Increased quantumness, due to positional uncertainty, causes deviations from classical behavior in particle displacements.
Area of Science:
- Condensed Matter Physics
- Quantum Fluids
- Statistical Mechanics
Background:
- Classical supercooled liquids exhibit distinct dynamics from their quantum counterparts.
- Understanding quantum liquid behavior is crucial for fields like quantum computing and materials science.
Purpose of the Study:
- To investigate the influence of quantum effects on the dynamics of supercooled liquids.
- To analyze how particle position uncertainty modifies liquid dynamics compared to classical systems.
Main Methods:
- Utilizing mode-coupling theory for hard-sphere liquids.
- Performing simulations on binary Lennard-Jones liquids.
- Analyzing the first two moments of particle displacements: mean-squared displacement and 〈Δr⁴(t)〉.
Main Results:
- Quantum effects introduce qualitative changes in tagged particle dynamics.
- Increased quantumness leads to deviations from classical behavior, particularly in initial dynamics.
- A nonzero value of displacement moments at zero time is observed due to quantum uncertainty.
Conclusions:
- Quantum positional uncertainty significantly impacts supercooled liquid dynamics.
- Initial ballistic displacement behavior weakens with increasing quantumness.
- The study highlights fundamental differences between classical and quantum liquid dynamics.
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