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06:42
Generation and Coherent Control of Pulsed Quantum Frequency Combs
Published on: June 8, 2018
Dissipation induced coherence of a two-mode Bose-Einstein condensate
D Witthaut1, F Trimborn, S Wimberger
1QUANTOP, Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark. dirk.witthaut@nbi.dk
Physical Review Letters
|December 31, 2008
Summary
Stochastic resonance enhances Bose-Einstein condensate properties. Optimal dissipation rates maximize phase coherence and system response, especially with strong interactions.
Area of Science:
- Quantum physics
- Atomic physics
- Condensed matter physics
Background:
- Bose-Einstein condensates (BECs) are quantum states of matter with unique properties.
- Understanding BEC dynamics under dissipation is crucial for quantum technologies.
- Phase noise and particle loss are common challenges in experimental BECs.
Purpose of the Study:
- To investigate the influence of phase noise and particle loss on BEC dynamics in a double-well trap.
- To explore the phenomenon of stochastic resonance in BECs.
- To analyze the combined effects of dissipation and interparticle interactions.
Main Methods:
- Theoretical modeling of a Bose-Einstein condensate in a double-well potential.
- Inclusion of phase noise and particle loss terms in the condensate dynamics.
- Analysis of phase coherence and response to external driving forces.
Main Results:
- A pronounced stochastic resonance effect was observed in both phase coherence and response to driving.
- These quantities peaked at a specific, finite dissipation rate.
- Strong interparticle interactions amplified the stochastic resonance, significantly improving condensate purity and phase coherence.
Conclusions:
- Dissipation, when tuned to system timescales, can beneficially enhance BEC properties via stochastic resonance.
- Interparticle interactions further boost these effects, offering pathways to purer and more coherent condensates.
- This work provides insights into controlling quantum systems with dissipation.
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