Laser control of ultracold molecule formation: The case of RbSr

We have studied the formation of ultracold RbSr molecules with laser pulses. After discussing the advantages of the Mott insulator phase for the control with pulses, we present two classes of strategies. The first class involves two electronic states. Two extensions of stimulated Raman adiabatic pas...

Full description

Saved in:
Bibliographic Details
Published in:arXiv.org 2020-11
Main Authors: Devolder, Adrien, Desouter-Lecomte, Michèle, Atabek, Osman, Luc-Koenig, Eliane, Dulieu, Olivier
Format: Article
Language:English
Subjects:
Chemical bonds
Electron states
Ground state
Lasers
Optimal control
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We have studied the formation of ultracold RbSr molecules with laser pulses. After discussing the advantages of the Mott insulator phase for the control with pulses, we present two classes of strategies. The first class involves two electronic states. Two extensions of stimulated Raman adiabatic passage (STIRAP) for multi-level transitions are used : alternating STIRAP (A-STIRAP) and straddle STIRAP (S-STIRAP). Both transfer dynamics are modeled and compared. The second class of strategies involves only the electronic ground state and uses infrared (IR)/TeraHertz (THz) pulses. The chemical bond is first created by the application of a THz chirped pulse or \(\pi\)-pulse. Subsequently, the molecules are transferred to their ro-vibrational ground state using IR pulses. For this last step, different optimized pulse sequences through optimal control techniques, have been studied. The relative merits of these strategies in terms of efficiency and robustness are discussed within the experimental feasibility criteria of present laser technology.
ISSN:2331-8422
DOI:10.48550/arxiv.2011.12813