High-intensity two-frequency photoassociation spectroscopy of a weakly bound molecular state
This project studies the two-frequency photoassociation process of molecules with a weakly bound halo state in a high-intensity regime. In the two-frequency photoassociation experiment of 86Sr performed by Aman et. al., where 86Sr atoms are coupled to the weakly bound halo state in the ground ele...
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| Other Authors: | |
| Format: | Final Year Project (FYP) |
| Language: | English |
| Published: |
2019
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| Online Access: | http://hdl.handle.net/10356/76878 |
| _version_ | 1811683102028726272 |
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| author | Kon, Wen Yu |
| author2 | Kaden Hazzard |
| author_facet | Kaden Hazzard Kon, Wen Yu |
| author_sort | Kon, Wen Yu |
| collection | NTU |
| description | This project studies the two-frequency photoassociation process of molecules with a
weakly bound halo state in a high-intensity regime. In the two-frequency photoassociation
experiment of 86Sr performed by Aman et. al., where 86Sr atoms are
coupled to the weakly bound halo state in the ground electronic channel, additional
features are observed in the high-intensity regime. These
features include higher order peaks and strong ac Stark shifts experienced by the
spectral peaks. A simple three-level model with a two-frequency drive on each leg of
the transition is introduced and is shown to capture the higher order peaks and their
positions accurately. By using Floquet and perturbation theory, a simple formula is
developed that replicates the binding energy of the halo state accurately. The threelevel
model developed here will be a useful guide for future explorations in twofrequency
photoassociation. In addition, a scheme using the weakly bound halo state
and strong ac Stark shift observed in the 86Sr photoassociation experiment to tune the
halo state into resonance is proposed. The proposed scheme is advantageous over
typical optical Feshbach resonance in tuning scattering length due to its lower atom
loss rate. This makes scattering length tuning using lasers more feasible. |
| first_indexed | 2024-10-01T04:07:23Z |
| format | Final Year Project (FYP) |
| id | ntu-10356/76878 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T04:07:23Z |
| publishDate | 2019 |
| record_format | dspace |
| spelling | ntu-10356/768782023-02-28T23:13:18Z High-intensity two-frequency photoassociation spectroscopy of a weakly bound molecular state Kon, Wen Yu Kaden Hazzard Tomasz Paterek School of Physical and Mathematical Sciences DRNTU::Science::Physics::Optics and light This project studies the two-frequency photoassociation process of molecules with a weakly bound halo state in a high-intensity regime. In the two-frequency photoassociation experiment of 86Sr performed by Aman et. al., where 86Sr atoms are coupled to the weakly bound halo state in the ground electronic channel, additional features are observed in the high-intensity regime. These features include higher order peaks and strong ac Stark shifts experienced by the spectral peaks. A simple three-level model with a two-frequency drive on each leg of the transition is introduced and is shown to capture the higher order peaks and their positions accurately. By using Floquet and perturbation theory, a simple formula is developed that replicates the binding energy of the halo state accurately. The threelevel model developed here will be a useful guide for future explorations in twofrequency photoassociation. In addition, a scheme using the weakly bound halo state and strong ac Stark shift observed in the 86Sr photoassociation experiment to tune the halo state into resonance is proposed. The proposed scheme is advantageous over typical optical Feshbach resonance in tuning scattering length due to its lower atom loss rate. This makes scattering length tuning using lasers more feasible. Bachelor of Science in Physics 2019-04-20T11:39:57Z 2019-04-20T11:39:57Z 2019 Final Year Project (FYP) http://hdl.handle.net/10356/76878 en 67 p. application/pdf |
| spellingShingle | DRNTU::Science::Physics::Optics and light Kon, Wen Yu High-intensity two-frequency photoassociation spectroscopy of a weakly bound molecular state |
| title | High-intensity two-frequency photoassociation spectroscopy of a weakly bound molecular state |
| title_full | High-intensity two-frequency photoassociation spectroscopy of a weakly bound molecular state |
| title_fullStr | High-intensity two-frequency photoassociation spectroscopy of a weakly bound molecular state |
| title_full_unstemmed | High-intensity two-frequency photoassociation spectroscopy of a weakly bound molecular state |
| title_short | High-intensity two-frequency photoassociation spectroscopy of a weakly bound molecular state |
| title_sort | high intensity two frequency photoassociation spectroscopy of a weakly bound molecular state |
| topic | DRNTU::Science::Physics::Optics and light |
| url | http://hdl.handle.net/10356/76878 |
| work_keys_str_mv | AT konwenyu highintensitytwofrequencyphotoassociationspectroscopyofaweaklyboundmolecularstate |