Accurate determination of the scattering length of erbium atoms
arXiv:2112.11883 · doi:10.1103/PhysRevA.105.063307
Abstract
An accurate knowledge of the scattering length is fundamental in ultracold quantum gas experiments and essential for the characterisation of the system as well as for a meaningful comparison to theoretical models. Here, we perform a careful characterisation of the s-wave scattering length for the four highest-abundance isotopes of erbium, in the magnetic field range from 0G to 5G. We report on cross-dimensional thermalization measurements and apply the Enskog equations of change to numerically simulate the thermalization process and to analytically extract an expression for the so-called number of collisions per re-thermalization (NCPR) to obtain from our experimental data. We benchmark the applied cross-dimensional thermalization technique with the experimentally more demanding lattice modulation spectroscopy and find good agreement for our parameter regime. Our experiments are compatible with a dependence of the NCPR with , as theoretically expected in the case of strongly dipolar gases. Surprisingly, we experimentally observe a dependency of the NCPR on the density, which might arise due to deviations from an ideal harmonic trapping configuration. Finally, we apply a model for the dependency of the background scattering length with the isotope mass, allowing to estimate the number of bound states of erbium.
arXiv comment13 pages, 8 figures
References in corpus (46)
- Many-Body Physics with Ultracold Gases
- Quantum phase transition from a superfluid to a Mott insulator in a gas of ultracold atoms
- Feshbach Resonances in Ultracold Gases
- Evidence for Efimov quantum states in an ultracold gas of cesium atoms
- Bose-Einstein Condensation of Erbium
- Quantum-fluctuation-driven crossover from a dilute Bose-Einstein condensate to a macro-droplet in a dipolar quantum fluid
- Observation of a dipolar quantum gas with metastable supersolid properties
- Transient supersolid properties in an array of dipolar quantum droplets
- Long-lived and transient supersolid behaviors in dipolar quantum gases
- Extended Bose-Hubbard Models with Ultracold Magnetic Atoms
- Trapped condensates of atoms with dipole interactions
- Observation of Roton Mode Population in a Dipolar Quantum Gas
- Quantum Chaos in Ultracold Collisions of Erbium
- Two-color photoassociation spectroscopy of ytterbium atoms and the precise determinations of s-wave scattering lengths
- Beyond Mean-Field Low-Lying Excitations of Dipolar Bose Gases
- Observation of p-wave Threshold Law Using Evaporatively Cooled Fermionic Atoms
- Probing the roton excitation spectrum of a stable dipolar Bose gas
- Dilute dipolar quantum droplets beyond the extended Gross-Pitaevskii equation
- Emergence of chaotic scattering in ultracold Er and Dy
- Spectroscopy of ultracold atoms by periodic lattice modulations
- Dipolar evaporation of reactive molecules to below the Fermi temperature
- Narrow-line magneto-optical trap for erbium
- Tuning of dipolar interactions and evaporative cooling in a three-dimensional molecular quantum gas
- Scissors mode of dipolar quantum droplets of dysprosium atoms
- Dipolar Bose-Einstein condensates with dipole-dependent scattering length
- s-wave scattering lengths of the strongly dipolar bosons Dy and Dy
- Dipolar Bose gases: Many-body versus mean-field description
- Broad universal Feshbach resonances in the chaotic spectrum of Dysprosium atoms
- Anisotropy induced Feshbach resonances in a quantum dipolar gas of magnetic atoms
- Realization of a Strongly Interacting Fermi Gas of Dipolar Atoms
- Low energy atomic collision with dipole interactions
- Scattering lengths in isotopologues of the RbYb system
- Feshbach Resonances in an Erbium-Dysprosium Dipolar Mixture
- Controlling interactions between highly-magnetic atoms with Feshbach resonances
- Determination of the s-wave Scattering Length of Chromium
- Anisotropic expansion of a thermal dipolar Bose gas
- Dysprosium dipolar Bose-Einstein condensate with broad Feshbach resonances
- Analytical model of overlapping Feshbach resonances
- Anisotropic relaxation dynamics in a dipolar Fermi gas driven out of equilibrium
- Differential Scattering and Rethermalization in Ultracold Dipolar Gases
- Properties of strongly dipolar Bose gases beyond the Born approximation
- Anisotropic thermalization of dilute dipolar gases
- Cross-Dimensional relaxation in Bose-Fermi mixtures
- Nonequilibrium dynamics of an ultracold dipolar gas
- Linear Response of a Periodically Driven Thermal Dipolar Gas
- Undamped nonequilibrium dynamics of a nondegenerate Bose gas in a 3D isotropic trap
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- Production and stabilization of a spin mixture of ultracold dipolar Bose gases
- Thermoviscous Hydrodynamics in Non-Degenerate Dipolar Bose Gases
- Characterisation of three-body loss in Er and optimised production of large Bose-Einstein condensates
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- Analytical solutions of the Schrödinger equation for two confined atoms with van der Waals interaction
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