Optimal trapping wavelengths of Cs2 molecules in an optical lattice

2011/02/09 by Romain Véxiau, Nadia Bouloufa, Mireille Aymar +8
Chemistry · Physics and Astronomy · #Adiabatic process #Atomic and Subatomic Physics Research #Atomic physics #Chemistry #Cold Atom Physics and Bose-Einstein Condensates #Condensed matter physics #Degenerate energy levels #Dipole #Feshbach resonance #Ground state #Lattice (music) #Molecular physics #Molecule #Optical lattice #Physics #Polarizability #Population #Quantum mechanics #Quantum optics and atomic interactions #Superfluidity #Trapping #Wavelength #physics.atom-ph #quant-ph

paper · pdf · doi:10.1140/epjd/e2011-20085-4

arxiv created 2011/02/09 · openalex publication_date 2011/08/02 · arxiv updated 2015/05/27 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

The present paper aims at finding optimal parameters for trapping of Cs₂ molecules in optical lattices, with the perspective of creating a quantum degenerate gas of ground-state molecules. We have calculated dynamic polarizabilities of Cs₂ molecules subject to an oscillating electric field, using accurate potential curves and electronic transition dipole moments. We show that for some particular wavelengths of the optical lattice, called "magic wavelengths", the polarizability of the ground-state molecules is equal to the one of a Feshbach molecule. As the creation of the sample of ground-state molecules relies on an adiabatic population transfer from weakly-bound molecules created on a Feshbach resonance, such a coincidence ensures that both the initial and final states are favorably trapped by the lattice light, allowing optimized transfer in agreement with the experimental observation.

Citations

• Electric dipole polarizabilities at imaginary frequencies for hydrogen, the alkali–metal, alkaline–earth, and noble gas atoms
• Creation of a Molecular Condensate by Dynamically Melting a Mott Insulator
• Quantum Gas of Deeply Bound Ground State Molecules
• Calculations of static dipole polarizabilities of alkali dimers: Prospects for alignment of ultracold molecules
• Optical Pumping and Vibrational Cooling of Molecules
• Coherent population transfer among quantum states of atoms and molecules
• Quantum State Engineering and Precision Metrology Using State-Insensitive Light Traps
• Precision molecular spectroscopy for ground state transfer of molecular quantum gases
• Deeply bound ultracold molecules in an optical lattice

Cited by

• Large anomalous shifts of potassium-39 Feshbach resonances