NDLI: Observation of Resonant Electric Dipole-Dipole Interactions Between Cold Rydberg Atoms Using Microwave Spectroscopy

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Observation of Resonant Electric Dipole-Dipole Interactions Between Cold Rydberg Atoms Using Microwave Spectroscopy

Content Provider	Semantic Scholar
Author	Afrousheh, K.
Copyright Year	2006
Abstract	This thesis reports the first observation of the resonant electric dipole-dipole interaction between cold Rydberg atoms using microwave spectroscopy, the observation of the magnetic field suppression of resonant interactions, and the development of a unique technique for precise magnetic field measurements. A Rydberg state (46d5/2) of laser cooled 85Rb atoms has been optically excited. A fraction of these atoms has been transferred to another Rydberg state (47p3/2 or 45f5/2,7/2) to introduce resonant electric dipole-dipole interactions. The line broadening of the two-photon 46d5/2 − 47d5/2 microwave transition due to the interaction of 46d5/2 with 47p3/2 or 45f5/2,7/2 atoms has been used as a probe of the interatomic interactions. This experiment has been repeated with a DC magnetic field applied. The application of a weak magnetic field (≤ 0.6G) has reduced the line broadening due to the resonant electric dipole-dipole interaction, indicating that the interactions are suppressed by the field. Theoretical models have been developed that predict the energy shifts due to the resonant electric dipole-dipole interaction, and the suppression of interactions by magnetic fields. A novel technique for sensitive measurement of magnetic fields using the 34s1/2−34p1/2 one-photon microwave transition has also been presented. Using this technique, it has been possible to calibrate magnetic fields in the magneto-optical trap (MOT) apparatus to less than 10mG, and put an upper bound of 17mG on any remaining field inhomogeneity.
File Format	PDF HTM / HTML
Alternate Webpage(s)	http://etd.uwaterloo.ca/etd/kafroush2006.pdf
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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