2015/07/14 by A. Safavi-Naini, Arghavan Safavi-Naini, Michael L. Wall +3
Chemistry · Physics and Astronomy · #Adiabatic process #Chemical physics #Chemistry #Cold Atom Physics and Bose-Einstein Condensates #Condensed matter physics #Degenerate energy levels #Fermi gas #Heteronuclear molecule #Lattice (music) #Molecule #Monte Carlo method #Optical lattice #Path integral Monte Carlo #Path integral formulation #Physics #Polar #Quantum #Quantum Monte Carlo #Quantum many-body systems #Quantum mechanics #Quantum, superfluid, helium dynamics #Thermodynamics #cond-mat.quant-gas #quant-ph
paper · pdf · doi:10.1103/physreva.92.063416
5 pages, 4 figures
arxiv created 2015/07/14 · openalex publication_date 2015/12/18 · arxiv updated 2016/01/20 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The preparation of a quantum degenerate gas of heteronuclear molecules has been an outstanding challenge. We use path-integral quantum Monte Carlo simulations to understand the role of interactions and finite temperature effects in the protocol currently employed to adiabatically prepare a low-entropy gas of polar molecules in a lattice starting from an ultracold Bose-Fermi mixture. We find that interspecies interactions affect the final temperature of the mixture after the adiabatic loading procedure and detrimentally limit the molecular peak filling. Our conclusions are in agreement with recent experimental measurements [Moses et al., Science 350, 659 (2015)] and therefore are of immediate relevance for the myriad experiments that aim to form molecules from dual-species atomic gases.