Topic
Quantum reflection
About: Quantum reflection is a research topic. Over the lifetime, 206 publications have been published within this topic receiving 2392 citations.
Papers published on a yearly basis
Papers
TL;DR: The theory of quantum reflection is extended to account for the mean-field interactions of a condensate which suppresses quantum reflection at low velocity and the reflected condensates show collective excitations as recently predicted.
Abstract: We study how interactions affect the quantum reflection of Bose-Einstein condensates. A patterned silicon surface with a square array of pillars resulted in high reflection probabilities. For incident velocities greater than 2.5 mm/s, our observations agreed with single-particle theory. At velocities below 2.5 mm/s, the measured reflection probability saturated near 60% rather than increasing towards unity as predicted by the accepted theoretical model. We extend the theory of quantum reflection to account for the mean-field interactions of a condensate which suppresses quantum reflection at low velocity. The reflected condensates show collective excitations as recently predicted.
197 citations
TL;DR: Studies of s(T) as a function of film thickness clearly demonstrate the influence of the van der Waals-Casimir force due to the substrate, in agreement with recent theories.
Abstract: Measurements of the sticking probability s(T) for H on bulk liquid 4 He reveal the onset of the universal T dependence expected at very low atom temperatures. Studies of s(T) as a function of film thickness clearly demonstrate the influence of the van der Waals-Casimir force due to the substrate, in agreement with recent theories
113 citations
TL;DR: In this article, the non-classical reflection of solitons from a purely attractive potential was investigated and the effect of nonlinear mean-field interactions was found to be due to the nonlinear Schrodinger equation.
Abstract: Matter-wave bright solitons are predicted to reflect from a purely attractive potential well although they are macroscopic objects with classical particle-like properties. The non-classical reflection occurs at small velocities and a pronounced switching to almost perfect transmission above a critical velocity is found, caused by nonlinear mean-field interactions. Full numerical results from the nonlinear Schrodinger equation are complimented by a two-mode variational calculation to explain the predicted effect, which can be used for velocity filtering of solitons. The experimental realization with laser-induced potentials or two-component Bose-Einstein condensates is suggested.
112 citations
TL;DR: In this paper, matter-wave bright solitons are predicted to reflect from a purely attractive potential well although they are macroscopic objects with classical particle-like properties, and a pronounced switching to almost perfect transmission above a critical velocity is found, caused by nonlinear mean-field interactions.
Abstract: Matter-wave bright solitons are predicted to reflect from a purely attractive potential well although they are macroscopic objects with classical particle-like properties. The non-classical reflection occurs at small velocities and a pronounced switching to almost perfect transmission above a critical velocity is found, caused by nonlinear mean-field interactions. Full numerical results from the nonlinear Schr\"{o}dinger equation are complimented by a two-mode variational calculation to explain the predicted effect, which can be used for velocity filtering of solitons. The experimental realization with laser-induced potentials or two-component Bose-Einstein condensates is suggested.
82 citations
TL;DR: In this article, the authors reported the observation of quantum reflection from a narrow attractive potential using bright solitary matter waves formed from a Rb 85 Bose-Einstein condensate.
Abstract: We report the observation of quantum reflection from a narrow attractive potential using bright solitary matter waves formed from a Rb 85 Bose-Einstein condensate. We create the attractive potential using a tightly focused, red-detuned laser beam, and observe reflection of up to 25% of the atoms, along with the confinement of atoms at the position of the beam. We show that the observed reflected fraction is much larger than theoretical predictions for a simple Gaussian potential well. A more detailed model of bright soliton propagation, accounting for the generic presence of small subsidiary intensity maxima in the red-detuned beam, suggests that these small intensity maxima are the cause of this enhanced reflection.
65 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2021 | 4 |
| 2020 | 7 |
| 2019 | 8 |
| 2018 | 10 |
| 2017 | 8 |
| 2016 | 8 |