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Fragmentation and correlations in a rotating Bose-Einstein condensate undergoing breakup.
Sunayana Dutta1,2, Axel U J Lode3, Ofir E Alon4,5
1Department of Physics, University of Haifa, 3498838, Haifa, Israel. sdutta@campus.haifa.ac.il.
Scientific Reports
|February 27, 2023
Summary
Rotation causes Bose-Einstein condensates in anharmonic traps to fragment into multiple sub-clouds. Many-body correlations reveal distinct behaviors compared to mean-field predictions during this breakup process.
Area of Science:
- Quantum physics
- Atomic physics
- Condensed matter theory
Background:
- Bose-Einstein condensates (BECs) are quantum states of matter.
- Theoretical studies often focus on vortex states in rotating BECs.
- Anharmonic potentials offer unique confinement geometries.
Purpose of the Study:
- Investigate the impact of rotation on BEC ground states in anharmonic traps.
- Examine fragmentation and many-body correlations during rotation-induced breakup.
- Compare mean-field and many-body theoretical predictions.
Main Methods:
- Theoretical investigation using mean-field and many-body approaches.
- Multiconfigurational time-dependent Hartree method for bosons (MCTDHB).
- Analysis of ground state densities, angular momentum, and variances.
Main Results:
- Rotation induces fragmentation of BEC ground state densities in anharmonic traps.
- Fragmentation correlates with angular momentum acquisition.
- Many-body correlations lead to smaller variances and opposite anisotropies than mean-field results for strong rotations.
- Symmetric systems (k=3, 4) exhibit k-fold fragmentation into sub-clouds.
Conclusions:
- Provides a comprehensive many-body analysis of correlations during rotation-induced BEC breakup.
- Highlights significant deviations between many-body and mean-field predictions.
- Demonstrates rotation-induced fragmentation and correlation buildup in trapped BECs.
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