Optically trapped Feshbach molecules of fermionic Dy and K: Role of light-induced and collisional losses
arXiv:2512.13521 · doi:10.1103/ftpc-qq4c
Abstract
We study the decay of a dense, ultracold sample of weakly bound DyK dimers stored in an optical dipole trap. Our bosonic dimers are composed of the fermionic isotopes Dy and K, which is of particular interest for experiments related to pairing and superfluidity in fermionic systems with mass imbalance. We have realized dipole traps with near-infrared laser light in four different wavelength regions between 1050 and 2002 nm. We have identified trap-light-induced processes as the overall dominant source of losses, except for wavelengths around 2000 nm, where light-induced losses appeared to be much weaker. In a trap near 1550 nm, we found a plateau of minimal light-induced losses, and by carefully tuning the wavelength, we reached conditions where losses from inelastic collisions between the trapped dimers became observable. For very weakly bound dimers close to the center of a magnetically tuned Feshbach resonance, we demonstrate the Pauli suppression of collisional losses by about an order of magnitude.
12 pages, 5 figures
References in corpus (40)
- A High Phase-Space-Density Gas of Polar Molecules
- Bose-Einstein condensation of chromium
- Many-Body Physics with Individually-Controlled Rydberg Atoms
- Observation of Bose-Einstein Condensation of Molecules
- Crossover from a molecular Bose-Einstein condensate to a degenerate Fermi gas
- Weakly bound dimers of fermionic atoms
- Ultracold dense samples of dipolar RbCs molecules in the rovibrational and hyperfine ground state
- Molecular Probe of Pairing in the BEC-BCS Crossover
- Ultracold Molecules in the Ro-Vibrational Triplet Ground State
- Pure Gas of Optically Trapped Molecules Created from Fermionic Atoms
- Three-boson problem near a narrow Feshbach resonance
- Coherent optical transfer of Feshbach molecules to a lower vibrational state
- Observation of Bose-Einstein Condensation of Dipolar Molecules
- Assembly of a rovibrational ground state molecule in an optical tweezer
- Low-energy three-body dynamics in binary quantum gases
- Diatomic molecules in ultracold Fermi gases - Novel composite bosons
- A dual-species Rydberg array
- Spectroscopy of Ultracold, Trapped Cesium Feshbach Molecules
- Universal model for exoergic bimolecular reactions and inelastic processes
- Forming a single molecule by magnetoassociation in an optical tweezer
- Atomic Bose-Einstein condensate to molecular Bose-Einstein condensate transition
- Formation of ultracold molecules by merging optical tweezers
- Collisions between tunable halo dimers: exploring an elementary four-body process with identical bosons
- Collisional properties of weakly bound heteronuclear dimers
- Thermal equilibrium and efficient evaporation of an ultracold atom-molecule mixture
- Measurement of the Electric Dipole Moment of Yb Atoms in an Optical Dipole Trap
- High Resolution Molecular Spectroscopy for Producing Ultracold Absolute Ground-State NaRb Molecules
- Beyond-mean-field description of a trapped unitary Fermi gas with mass and population imbalance
- Lifetime of Feshbach dimers in a Fermi-Fermi mixture of Li and K
- Ultracold LiCr: a new pathway to quantum gases of paramagnetic polar molecules
- Double-degenerate Fermi mixtures of Li and Cr atoms
- Optical Tweezer Arrays of Erbium Atoms
- Observation of low-field Feshbach resonances between Dy and K
- Efficient Pathway to NaCs Ground State Molecules
- Clock precision beyond the Standard Quantum Limit at level
- Optically trapped Feshbach molecules of fermionic 161Dy and 40K
- Measurement of the g factor of ground-state 87Sr at the parts-per-million level using co-trapped ultracold atoms
- Two-Body Contact Dynamics in a Bose Gas near a Fano-Feshbach Resonance
- Dipole-Mode Spectrum and Hydrodynamic Crossover in a Resonantly Interacting Two-Species Fermion Mixture
- Optically trapped Feshbach molecules of fermionic Dy and K: Role of light-induced and collisional losses