Type
Text
Type
Thesis
Advisor
Schneble, Dominik | Metcalf, Harold | Sehgal, Neelima.
Date
2015-12-01
Keywords
Atomic physics | Adiabatic Rapid Passage
Department
Department of Physics
Language
en_US
Source
This work is sponsored by the Stony Brook University Graduate School in compliance with the requirements for completion of degree.
Identifier
http://hdl.handle.net/11401/76670
Publisher
The Graduate School, Stony Brook University: Stony Brook, NY.
Format
application/pdf
Abstract
Laser cooling refers to the techniques that cool atomic and molecular samples down to near absolute zero through the interaction with laser fields. Atoms absorb a photon and the transferred momentum generates force to lower the atom's velocity. The Doppler shift is associated with the motion of the atom, in which a moving atom always observes a slightly different frequency than the laser at rest. Based on the two-level system theory, this thesis studied the process of multiple sequences of adiabatic rapid passage by simulating the process of the interaction between optical forces and helium atoms. By studying the force map in parameter space, trying to understand the relationship between the average force and relevant laser parameters $\Omega_0$ and $\delta_0$ in the Rabi frequency. Furthermore, we studied the relationship between the average force and velocity by comparing the dragged atom model and moving atom model. We also studied the process of multiple sequences of adiabatic rapid passage by changing spontaneous emission, sweep range, pulse number for the interaction, exploring the distance between peaks that appear in the velocity distribution. The observational results will be presented in the thesis as well as the explanation. | 86 pages
Recommended Citation
Zhang, HE, "Numerical Study of Periodic Adiabatic Rapid Passage Sequences" (2015). Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions). 2554.
https://commons.library.stonybrook.edu/stony-brook-theses-and-dissertations-collection/2554