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Controlling chaos in a weakly coupled array of Bose-Einstein condensates
Guishu Chong1, Wenhua Hai, Qiongtao Xie
1Department of Physics, Hunan Normal University, Changsha 410081, China.
Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
|February 9, 2005
Summary
Scientists controlled chaos in Bose-Einstein condensates using laser pulses. This method suppresses spatial chaos, leading to regular distributions suitable for experiments and applications.
Area of Science:
- Quantum physics
- Atomic physics
- Nonlinear dynamics
Background:
- Bose-Einstein condensates (BECs) exhibit complex spatial structures when confined in optical lattices.
- Spatially chaotic distributions are observed in BECs under tight-binding approximations.
- Controlling chaos in quantum systems is crucial for harnessing their properties.
Purpose of the Study:
- To investigate the spatial structure of Bose-Einstein condensates in optical lattices.
- To demonstrate the control of spatially chaotic distributions in BECs.
- To achieve regular condensate distributions for potential applications.
Main Methods:
- Loading Bose-Einstein condensates into optical lattice potentials.
- Applying the Ott-Grebogi-Yorker (OGY) scheme for chaos control.
- Using laser pulses as control signals on specific lattice sites.
Main Results:
- Spatially chaotic distributions of BECs were revealed under tight-binding approximation.
- Successful suppression of chaos was achieved using the OGY scheme with laser pulses.
- The system was guided onto a stable manifold of a target orbit.
Conclusions:
- Chaos control in Bose-Einstein condensates is feasible using targeted laser pulses.
- The OGY scheme effectively suppresses spatial chaos in optical lattice BECs.
- Achieved regular distributions open possibilities for experimental and practical applications of BECs.