All-optical production of ${}^6\text{Li}$ molecular BEC in excited hyperfine levels

Abstract

We present an all-optical method for achieving molecular Bose-Einstein condensates of ${}^6\text{Li}$. We demonstrate this with mixtures in the lowest two (1-2), and second lowest two (2-3) hyperfine states. For the 1-2 mixture, we can achieve condensate fractions of 36\%, with $9\times 10^4$ atoms at $0.05\mu \text{K}$ temperature. For the 2-3 mixture, we have 28\% condensed with $3.2\times 10^4$ atoms at $0.05\mu \text{K}$ temperature. We use mostly standard methods, but make a number of refinements in the magnetic bias coils compared with earlier work. Our method imposes minimal constraints on subsequent experiments by allowing plenty of optical access while requiring only one high-vacuum chamber. We use an optical system designed around minimizing the number of active elements, and we can accomplish slowing and sub-Doppler cooling with a single tapered amplifier

References in corpus (19)

• Many-Body Physics with Ultracold Gases
• Feshbach Resonances in Ultracold Gases
• Quantum Simulation
• Observation of a Strongly-Interacting Degenerate Fermi Gas of Atoms
• Observation of Bose-Einstein Condensation of Molecules
• Crossover from a molecular Bose-Einstein condensate to a degenerate Fermi gas
• Superfluidity of spin-polarized 6Li
• BCS-BEC Crossover and the Unitary Fermi Gas
• Λ-enhanced Sub-Doppler Cooling of Lithium Atoms in D1 Gray Molasses
• Sub-Doppler laser cooling of fermionic 40K atoms in three-dimensional gray optical molasses
• Efficient all-optical production of large ${}^6$Li quantum gases using D${}_1$ gray-molasses cooling
• Three-boson problem at low energy and Implications for dilute Bose-Einstein condensates
• High temperature pairing in a strongly interacting two-dimensional Fermi gas
• Simultaneous sub-Doppler laser cooling of fermionic ${}^6$Li and ${}^{40}$K on the D${}_1$ line: Theory and Experiment
• Effusive Atomic Oven Nozzle Design Using an Aligned Microcapillary Array
• The Efimov effect in lithium 6
• Efficient Continuous-Duty Bitter-Type Electromagnets for Cold Atom Experiments
• All-Optical Production of quantum degeneracy and molecular BEC of ${}^6$Li
• Buffer gas-assisted polarization spectroscopy of 6Li

Cited by in corpus (7)

• Methods for Preparing Quantum Gases of Lithium
• Cavity-assisted preparation and detection of a unitary Fermi gas
• Spin Susceptibility Above the Superfluid Onset in Ultracold Fermi Gases
• Compact bulk-machined electromagnets for quantum gas experiments
• A Bitter-type electromagnet for complex atomic trapping and manipulation
• Enhanced principle component method for fringe removal in cold atom images
• Efficient water-cooled Bitter-type electromagnet for Zeeman slowing in cold-atom experiments