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Creating nonclassical states of Bose-Einstein condensates by dephasing collisions
Nir Bar-Gill1, D D Bhaktavatsala Rao, Gershon Kurizki
1Weizmann Institute of Science, Rehovot, Israel.
Physical Review Letters
|July 30, 2011
Summary
Collisions with a thermal reservoir induce nonlinear dynamics in double-well Bose-Einstein condensates (BECs). This process aids in creating quantum squeezing and macroscopic superposition states, with potential enhancement using optical lattices.
Area of Science:
- Quantum physics
- Atomic physics
- Condensed matter physics
Background:
- Bose-Einstein condensates (BECs) are quantum states of matter.
- Double-well potentials create distinct quantum states.
- Thermal reservoirs can interact with quantum systems.
Purpose of the Study:
- To investigate the effects of thermal reservoir collisions on double-well BECs.
- To explore the induction of nonlinear dynamics and quantum phenomena.
- To assess the potential for enhancing these effects with optical lattices.
Main Methods:
- Utilizing an exactly solvable model for theoretical analysis.
- Simulating collisions between a double-well BEC and a thermal reservoir.
- Analyzing the dynamics of quantum squeezing and superposition states.
Main Results:
- Nonlinear dynamics are induced in double-well BECs via thermal reservoir collisions.
- The induced dynamics facilitate the creation of phase or number squeezing.
- Macroscopic nonclassical superposition states can be generated at longer timescales.
Conclusions:
- Thermal reservoir interactions are a viable mechanism for inducing nonlinear dynamics in BECs.
- Quantum squeezing and superposition states can be controllably generated.
- Optical lattices offer a method to enhance the creation of these nonclassical states.
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