Emergence of chaotic scattering in ultracold Er and Dy

Abstract

We show that for ultracold magnetic lanthanide atoms chaotic scattering emerges due to a combination of anisotropic interaction potentials and Zeeman coupling under an external magnetic field. This scattering is studied in a collaborative experimental and theoretical effort for both dysprosium and erbium. We present extensive atom-loss measurements of their dense magnetic Feshbach resonance spectra, analyze their statistical properties, and compare to predictions from a random-matrix-theory inspired model. Furthermore, theoretical coupled-channels simulations of the anisotropic molecular Hamiltonian at zero magnetic field show that weakly-bound, near threshold diatomic levels form overlapping, uncoupled chaotic series that when combined are randomly distributed. The Zeeman interaction shifts and couples these levels, leading to a Feshbach spectrum of zero-energy bound states with nearest-neighbor spacings that changes from randomly to chaotically distributed for increasing magnetic field. Finally, we show that the extreme temperature sensitivity of a small, but sizeable fraction of the resonances in the Dy and Er atom-loss spectra is due to resonant non-zero partial-wave collisions. Our threshold analysis for these resonances indicates a large collision-energy dependence of the three-body recombination rate.

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Cited by in corpus (87)

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• Dipolar physics: A review of experiments with magnetic quantum gases
• Dipolar Quantum Mixtures of Erbium and Dysprosium Atoms
• Dilute dipolar quantum droplets beyond the extended Gross-Pitaevskii equation
• Direct probe of anisotropy in atom-molecule collisions via quantum scattering resonances
• A long-lived spin-orbit-coupled degenerate dipolar Fermi gas
• Observation of Feshbach resonances between a single ion and ultracold atoms
• Liquid quantum droplets of ultracold magnetic atoms
• Droplet formation in a Bose-Einstein condensate with strong dipole-dipole interaction
• Roton Excitations in an Oblate Dipolar Quantum Gas
• Broad universal Feshbach resonances in the chaotic spectrum of Dysprosium atoms
• Realization of a Strongly Interacting Fermi Gas of Dipolar Atoms
• Properties of a dipolar condensate with three-body interactions
• Feshbach Resonances in an Erbium-Dysprosium Dipolar Mixture
• Crystallisation of a dilute atomic dipolar condensate
• Anisotropic expansion of a thermal dipolar Bose gas
• Feshbach resonances in $p$-wave three-body recombination within Fermi-Fermi mixtures of open-shell ${}^6$Li and closed-shell ${}^{173}$Yb atoms
• Optical cooling and trapping of highly magnetic atoms: The benefits of a spontaneous spin polarization
• Optical trapping of ultracold dysprosium atoms: transition probabilities, dynamic dipole polarizabilities and van der Waals $C_6$ coefficients
• Long-lived complexes and signatures of chaos in ultracold K2+Rb collisions
• Dysprosium dipolar Bose-Einstein condensate with broad Feshbach resonances
• Random to chaotic temperature transition in low-field Fano-Feshbach resonances of cold thulium atoms
• Quantum phases of tilted dipolar bosons in two-dimensional optical lattice
• Time-of-flight expansion of binary Bose-Einstein condensates at finite temperature
• Bose-Einstein Condensation of Europium
• Accurate determination of the scattering length of erbium atoms
• A fermionic impurity in a dipolar quantum droplet
• The approach to chaos in ultracold atomic and molecular physics: statistics of near-threshold bound states for Li+CaH and Li+CaF
• Anisotropic optical trapping as a manifestation of the complex electronic structure of ultracold lanthanide atoms: the example of holmium
• Ultracold nonreactive molecules in an optical lattice: connecting chemistry to many-body physics
• Contact matrix in dilute quantum systems
• Magneto-optical trapping of optically pumped metastable europium
• Anisotropic blockade using pendular Rydberg butterfly molecules
• Narrow-line magneto-optical trap for europium
• Two-temperature momentum distribution in a Thulium magneto-optical trap
• Quantum chaos in ultracold collisions between Yb(${}^1$S${}_0$) and Yb(${}^3$P${}_2$)
• Magneto-optical trap of a Group III atom
• Microscopic derivation of multi-channel Hubbard models for ultracold nonreactive molecules in an optical lattice
• Mott-Insulator-Aided Detection of Ultra-Narrow Feshbach Resonances
• Observation of low-field Feshbach resonances between ${}^{161}$Dy and ${}^{40}$K
• Magnetically tunable Feshbach resonances in ultracold gases of europium atoms and mixtures of europium and alkali-metal atoms
• Anisotropic collisions of dipolar Bose-Einstein condensates in the universal regime
• Lattice model parameters for ultracold nonreactive molecules: chaotic scattering and its limitations
• Dispersive optical detection of magnetic Feshbach resonances in ultracold gases
• Relativistic aspects of orbital and magnetic anisotropies in the chemical bonding and structure of lanthanide molecules
• Quantitative analysis of losses close to a d-wave open-channel Feshbach resonance in Potassium 39
• Production and stabilization of a spin mixture of ultracold dipolar Bose gases
• Single-atom transistor as a precise magnetic field sensor
• Prospects of forming high-spin polar molecules from ultracold atoms
• Quantum chaos in Feshbach resonances of the ErYb system
• Characterizing the temperature dependence of Fano-Feshbach resonances of Ultracold Polarized Thulium
• Characterisation of three-body loss in ${}^{166}$Er and optimised production of large Bose-Einstein condensates
• Fractal Universality in Near-Threshold Magnetic Lanthanide Dimers
• Tunneling dynamics of ${}^{164}$Dy supersolids and droplets
• Magnetic Feshbach resonances in ultracold atom-molecule collisions
• Measuring the branching ratios from the $y^8{\mathrm{P}}_{9/2}$ state to metastable states in europium
• Bidirectional, Analog Current Source Benchmarked with Gray Molasses-Assisted Stray Magnetic Field Compensation
• Microwave coherent spectroscopy of ultracold thulium atoms
• Tuning the Order of the Nonequilibrium Quantum Phase Transition in a Hybrid Atom-Optomechanical System
• Orbital quantum magnetism in spin dynamics of strongly interacting magnetic lanthanide atoms
• Universality of Efimov states in highly mass-imbalanced cold-atom mixtures with van der Waals and dipole interactions
• Loss features in ultracold ${}^{162}$Dy gases: two- versus three-body processes
• A ship-in-a-bottle quantum gas microscope setup for magnetic mixtures
• Near-threshold bound states of the dipole-dipole interaction
• A Model for Scattering with Proliferating Resonances: Many Coupled Square Wells
• The Symplectic Fermi Liquid and its realization in cold atomic systems
• Exploring atom-ion Feshbach resonances below the s-wave limit
• Out-of-Time-Order-Correlator for van der Waals potential
• New opportunites for interactions and control with ultracold lanthanides
• Excitations and impurity dynamics in a fermionic Mott insulator with nearest-neighbor interactions
• Optimal control of the self-bound dipolar droplet formation process
• Floquet-Engineering of Feshbach Resonances in Ultracold Gases
• Photoassociation of spin polarized Chromium
• Precise Feshbach resonance spectroscopy using tight anharmonic traps
• Leggett mode in a two-component Fermi gas with dipolar interactions
• Two-Body Contact Dynamics in a Bose Gas near a Fano-Feshbach Resonance
• Universal Efimov spectra and fermionic doublets in highly mass-imbalanced cold-atom mixtures with van der Waals and dipole interactions
• Quantum Reactive Scattering of Ultracold Atoms and Molecules: Universality and Chaotic Dynamics
• Aspects of arbitrarily oriented dipoles scattering in plane: short-range interaction influence
• Dipolar confinement-induced molecular states in harmonic waveguides
• Transport of magnetically sensitive atoms in a magnetic environment
• Mutual dipolar drag in a bilayer Fermi gas
• Magnetic Moments of Lanthanide van der Waals Dimers
• Low-field Feshbach resonances and three-body losses in a fermionic quantum gas of ${}^{161}$Dy