Formation of deeply bound molecules via chainwise adiabatic passage

Abstract

We suggest and analyze a novel technique for efficient and robust creation of dense ultracold molecular ensembles in their ground rovibrational state. In our approach a molecule is brought to the ground state through a series of intermediate vibrational states via a {\em multistate chainwise Stimulated Raman Adiabatic Passage} (c-STIRAP) technique. We study the influence of the intermediate states decay on the transfer process and suggest an approach that minimizes the population of these states, resulting in a maximal transfer efficiency. As an example, we analyze the formation of ${}^{87}$Rb${}_2$ starting from an initial Feshbach molecular state and taking into account major decay mechanisms due to inelastic atom-molecule and molecule-molecule collisions. Numerical analysis suggests a transfer efficiency $>$ 90%, even in the presence of strong collisional relaxation as are present in a high density atomic gas.

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Cited by in corpus (15)

• Formation and interactions of cold and ultracold molecules: new challenges for interdisciplinary physics
• Strongly interacting ultracold polar molecules
• Efficient formation of ground state ultracold molecules via STIRAP from the continuum at a Feshbach resonance
• Dark resonances for ground state transfer of molecular quantum gases
• Formation of ultracold SrYb molecules in an optical lattice by photoassociation spectroscopy: theoretical prospects
• Feshbach-optimized photoassociation of ultracold ${}^6$Li${}^{87}$Rb molecules with short pulses
• Achieving ground-state polar molecular condensates by chainwise atom-molecule adiabatic passage
• Highly Efficient Creation and Detection of Ultracold Deeply-Bound Molecules via Chainwise Stimulated Raman Shortcut-to-Adiabatic Passage
• Efficient production of polar molecular Bose-Einstein condensates via an all-optical R-type atom-molecule adiabatic passage
• Efficiency limitation for realizing an atom-molecule adiabatic transfer based on a chainwise system
• Optimal population transfer in combined Feshbach Resonance and STIRAP process
• Ultracold and dense samples of ground-state molecules in lattice potentials
• Formation of deeply bound polar molecules combining pump-dump pulses with infrared radiation
• Highly Efficient Creation and Detection of Deeply-bound Molecules via Invariant-based Inverse Engineering with Feasible Modified Drivings
• Quantum state engineering in a five-state chainwise system by coincident pulse technique