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APS Division of Atomic, Molecular and Optical Physics Meeting Abstracts

Characterization of ultracold 88Sr atoms for the dipolar interaction of the 3P0-3D1 transition

Shengnan Zhang, Preetam Ramchurn, Yeshpal Singh, Kai Bongs

Published Jan 1, 2020• 0 citations
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Related papers

Novel repumping on 3P0 → 3D1 for Sr magneto-optical trap and Landé g factor measurement of 3D1

Shengnan Zhang, Preetam Ramchurn, Marco Menchetti +4 more

Abstract We realize an experimental facility for cooling and trapping strontium (Sr) atoms and measure the Landé g factor of 3D1 of 88Sr. Thanks to a novel repumping scheme with the 3P2 → 3S1 and 3P0 → 3D1 combination and the permanent magnets based self-assembled Zeeman slower, the peak atom number in the continuously repumped blue magneto-optical trap is enhanced by a factor of 15 with respect to the non-repumping case, and reaches ∼1 billion. Furthermore, using the resolved-sideband Zeeman spectroscopy, the Landé g factor of 3D1 is measured to be 0.4995(88) showing a good agreement with the theoretical value of 0.4988. The results will have an impact on various applications including atom laser, dipolar interactions, quantum information and precision measurements.

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Exploring Few- and Many-Body Dipolar Quantum Phenomena with Ultracold Erbium Atoms

Francesca Ferlaino

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Ultracold interacting gases represent a new and exciting frontier for technological applications, such as quantum information processing, and they also offer an ideal test bench for condensed matter systems. \nThis work examines the case of atoms in the alkaline earth metal family. These atoms can exhibit long-range dipolar interactions, generated via coherent exchange of photons on the 3P0 ! 3D1 transition. In particular, the progress in realising an experiment to study this coherent exchange of atoms in bosonic strontium is discussed. A review of the experimental techniques developed over the last 50 years to cool, manipulate and study atoms and molecules used in long-range interaction experiments is given from a historical viewpoint. Techniques to laser cool and trap atomic strontium are described, and a novel study of different geometries for magneto-optical traps (MOTs) is presented. \nThis thesis describes the long-range interaction strontium experiment under development at the University of Birmingham. In particular, the characterisation of a self assembled Zeeman slower is presented, along with a novel repump scheme for the first stage of cooling using the 3P0 ! 3D1 transition. \nThis work also reports the use of the 3P1 ! 3S1 transition to populate the 3P0 level, and the realisation of a monolithic (Interference Filter External \nCavity Diode Laser) IFECDL. \nThe new techniques that I present here have the potential to facilitate future studies of long-range interaction in strontium and other cold atoms experiments.

•Jul 11, 2019•0 citations

Mapping the dipole-dipole interaction among ultracold Rydberg atoms

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The Measurement of Landé $g$ Factor of 3D1 with Cold 88Sr Atoms

Shengnan Zhang, Preetam Ramchurn, Kai Bongs +1 more

We experimentally observed the resolved Zeeman spectroscopy of the3P0-3D1 transition using the cold88Sr atoms, and measured the Landé g factor of3D1on the basis of the observable spectroscopy under different magnetic fields, which indicates the measured value is 0.4997(91) in good agreement with the calculated value of 0.4988. The detailed experimental scheme is presented here. Benefitting from the scheme, Sr atoms can be trapped in a mageto-optical trap (MOT) at a low temperature and a high density. The measurement of gJof3D1is beneficial to investigate the long range dipolar interaction on the3P0-3D1 transition of88Sr.

Joint Conference of the IEEE International Frequency Control Symposium and International Symposium on Applications of Ferroelectrics (IFCS-ISAF)•Jul 1, 2020•0 citations

Strongly correlated states in ultracold atoms

Dalla Torre, G Emanuele

•Jan 1, 2011•0 citations
Abstract We realize an experimental facility for cooling and trapping strontium (Sr) atoms and measure the Landé g factor of 3D1 of 88Sr. Thanks to a novel repumping scheme with the 3P2 → 3S1 and 3P0 → 3D1 combination and the permanent magnets based self-assembled Zeeman slower, the peak atom number in the continuously repumped blue magneto-optical trap is enhanced by a factor of 15 with respect to the non-repumping case, and reaches ∼1 billion. Furthermore, using the resolved-sideband Zeeman spectroscopy, the Landé g factor of 3D1 is measured to be 0.4995(88) showing a good agreement with the theoretical value of 0.4988. The results will have an impact on various applications including atom laser, dipolar interactions, quantum information and precision measurements.
Ultracold interacting gases represent a new and exciting frontier for technological applications, such as quantum information processing, and they also offer an ideal test bench for condensed matter systems. \nThis work examines the case of atoms in the alkaline earth metal family. These atoms can exhibit long-range dipolar interactions, generated via coherent exchange of photons on the 3P0 ! 3D1 transition. In particular, the progress in realising an experiment to study this coherent exchange of atoms in bosonic strontium is discussed. A review of the experimental techniques developed over the last 50 years to cool, manipulate and study atoms and molecules used in long-range interaction experiments is given from a historical viewpoint. Techniques to laser cool and trap atomic strontium are described, and a novel study of different geometries for magneto-optical traps (MOTs) is presented. \nThis thesis describes the long-range interaction strontium experiment under development at the University of Birmingham. In particular, the characterisation of a self assembled Zeeman slower is presented, along with a novel repump scheme for the first stage of cooling using the 3P0 ! 3D1 transition. \nThis work also reports the use of the 3P1 ! 3S1 transition to populate the 3P0 level, and the realisation of a monolithic (Interference Filter External \nCavity Diode Laser) IFECDL. \nThe new techniques that I present here have the potential to facilitate future studies of long-range interaction in strontium and other cold atoms experiments.
The Measurement of Landé ggg Factor of 3D1 with Cold 88Sr Atoms
We experimentally observed the resolved Zeeman spectroscopy of the3P0-3D1 transition using the cold88Sr atoms, and measured the Landé g factor of3D1on the basis of the observable spectroscopy under different magnetic fields, which indicates the measured value is 0.4997(91) in good agreement with the calculated value of 0.4988. The detailed experimental scheme is presented here. Benefitting from the scheme, Sr atoms can be trapped in a mageto-optical trap (MOT) at a low temperature and a high density. The measurement of gJof3D1is beneficial to investigate the long range dipolar interaction on the3P0-3D1 transition of88Sr.