Comparing contact and dipolar interaction in a Bose-Einstein condensate

Abstract

We have measured the relative strength ${\epsilon }_{d}d$ of the magnetic dipole-dipole interaction compared to the contact interaction in a chromium Bose-Einstein condensate. We analyze the asymptotic velocities of expansion of a dipolar chromium BEC with different orientations of the atomic magnetic dipole moments. By comparing them with numerical solutions of the hydrodynamic equations for dipolar condensates, we are able to determine ${\epsilon }_{d}d=0.159\pm 0.034$ with high accuracy. Since the absolute strength of the dipole-dipole interaction is known exactly, the relative strength of the dipoledipole interaction can be used to determine the s-wave scattering length $a=5.08\pm 1.06\cdot 10^{-}9m=96\pm 20a0$ of 52Cr. This is fully consistent with our previous measurements on the basis of Feshbach resonances.

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• Bose-Einstein condensation of chromium
• Bose-Einstein condensation in trapped dipolar gases
• Quantum phases of dipolar bosons in optical lattices
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• Observation of dipole-dipole interaction in a degenerate quantum gas
• Two-dimensional bright solitons in dipolar Bose-Einstein condensates
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• Vortex Lattices in Rotating Atomic Bose Gases with Dipolar Interactions
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• Accurate determination of the scattering length of metastable Helium atoms using dark resonances between atoms and exotic molecules
• Vortex Lattice in the Planar Bose-Einstein Condensates with Dipolar Interactions
• Expansion dynamics of a dipolar Bose-Einstein condensate
• Incompressible liquid state of rapidly-rotating bosons at filling factor 3/2
• Determination of the s-wave Scattering Length of Chromium
• Production of a chromium Bose-Einstein condensate
• Expansion of a dipolar condensate

Cited by in corpus (76)

• The physics of dipolar bosonic quantum gases
• Condensed Matter Theory of Dipolar Quantum Gases
• Strong dipolar effects in a quantum ferrofluid
• Tools for quantum simulation with ultracold atoms in optical lattices
• Dipolar physics: A review of experiments with magnetic quantum gases
• The creation of two-dimensional composite solitons in spin-orbit-coupled self-attractive Bose-Einstein condensates in free space
• Anisotropic solitons in dipolar Bose-Einstein Condensates
• All-Optical Production of Chromium Bose-Einstein Condensates
• Solitons in quasi one-dimensional Bose-Einstein condensates with competing dipolar and local interactions
• Strongly interacting ultracold polar molecules
• Vortex solitons in dipolar Bose-Einstein Condensates
• Dipolar and spinor bosonic systems
• Creating two-dimensional bright solitons in dipolar Bose-Einstein condensates
• Solitons in Tonks-Girardeau gas with dipolar interactions
• Hydrodynamics of cold atomic gases in the limit of weak nonlinearity, dispersion and dissipation
• Two-dimensional discrete solitons in dipolar Bose-Einstein condensates
• Anisotropic expansion of a thermal dipolar Bose gas
• Soliton stability and collapse in the discrete nonpolynomial Schrodinger equation with dipole-dipole interactions
• Dipolar Bose-Einstein condensates at Finite temperature
• Dynamics of quasi-one-dimensional bright and vortex solitons of a dipolar Bose-Einstein condensate with repulsive atomic interaction
• Vortices and vortex lattices in quantum ferrofluids
• Controllable non-local interactions between dark solitons in dipolar condensates
• Numerical and variational solutions of the dipolar Gross-Pitaevskii equation in reduced dimensions
• Spinor dipolar Bose-Einstein condensates; Classical spin approach
• Ground states of spin-3 Bose-Einstein condensates for conserved magnetization
• Supersolid Phase of Cold Fermionic Polar Molecules in 2D Optical Lattices
• Mixing, demixing, and structure formation in a binary dipolar Bose-Einstein condensate
• Vortex Lattice Formation in Dipolar Bose-Einstein Condensates via Rotation of the Polarization
• Bose-Einstein Condensation of Europium
• Ground state and collective excitations of a dipolar Bose-Einstein condensate in a bubble trap
• Dynamics of gap solitons in a dipolar Bose-Einstein condensate on a three-dimensional optical lattice
• Stable, mobile, dark-in-bright, dipolar Bose-Einstein condensate soliton
• Two-dimensional dipolar Bose-Einstein condensate bright and vortex solitons on one-dimensional optical lattice
• Mesoscopic supersolid of dipoles in a trap
• Phase separation of a two-component dipolar Bose-Einstein condensate in the quasi-one-dimensional and quasi-two-dimensional regime
• Massive phonons and gravitational dynamics in a photon-fluid model
• Dipolar Bose-Einstein condensate soliton on a two-dimensional optical lattice
• Anisotropic sound and shock waves in dipolar Bose-Einstein condensate
• Collapse instability of solitons in the nonpolynomial Schrödinger equation with dipole-dipole interactions
• Scalar, tensor and vector polarizability of Tm atoms in 532 nm dipole trap
• Near-Heisenberg-limited parameter estimation precision by a dipolar-Bose-gas reservoir engineering
• Collective oscillations of dipolar Bose-Einstein condensates and accurate comparison between contact and dipolar interaction
• Particles confined in arbitrary potentials with a class of finite-ranged interactions
• Groundstate and Collective Modes of a Spin-Polarized Dipolar Bose-Einstein Condensate in a Harmonic Trap
• Effect of an oscillating Gaussian obstacle in a Dipolar Bose-Einstein condensate
• Demixing and symmetry breaking in binary dipolar Bose-Einstein condensate solitons
• Statics and dynamics of a binary dipolar Bose-Einstein condensate soliton
• Bright dipolar Bose-Einstein condensate soliton mobile in a direction perpendicular to polarization
• A dipolar droplet bound in a trapped Bose-Einstein condensate
• Symmetry-breaking magnetization dynamics of spinor dipolar Bose-Einstein condensates
• Low-energy Effective Theory for One-dimensional Lattice Bosons near Integer Filling
• Deep inelastic collision of two-dimensional anisotropic dipolar condensate solitons
• Stability and collapse of fermions in a binary dipolar boson-fermion 164Dy-161Dy mixture
• Interaction of a Bose-Einstein Condensate and a Superconductor via Eddy Currents
• Rotational properties of non-dipolar and dipolar Bose-Einstein condensates confined in annular potentials
• Effects of Long-Range Nonlinear Interactions in Double-Well Potentials
• Bound states of a light atom and two heavy dipoles in two dimensions
• Critical Trap Aspect Ratios For Dipolar BEC
• Bright solitons in a quasi-one-dimensional reduced model of a dipolar Bose-Einstein condensate with repulsive short-range interactions
• Effect of short-range interaction for collision of ultracold dipoles
• Two-dimensional bright and dark-in-bright dipolar Bose-Einstein condensate solitons on a one-dimensional optical lattice
• Stable and mobile excited two-dimensional dipolar Bose-Einstein condensate solitons
• The field-induced interaction between non-resonant magnetic dipoles
• Critically-enhanced spin-nematic squeezing and entanglement in dipolar spinor condensates
• Dynamics of a dipolar Bose-Einstein condensate in the vicinity of a superconductor
• Effective field theory for spinor dipolar Bose Einstein condensates
• Repeating head-on collisions in an optical trap and the evaluation of spin-dependent interactions among neutral particles
• Condensate wave function and elementary excitations of bosonic polar molecules: beyond the first Born approximation
• Self-trapped leaky waves in lattices: discrete and Bragg soleakons
• Evaluation of the ${}^{52}$Cr-${}^{52}$Cr interaction via spin-flip scatterings
• Mutual dipolar drag in a bilayer Fermi gas
• Spatially-periodic states in a strongly dipolar ${}^{164}$Dy-${}^{162}$Dy mixture
• Bound Bogoliubov quasiparticles in photon superfluids
• The field induced magnetic dipolar interaction for general boundary conditions
• Quasiparticle spectra of mixtures of dipolar and non-dipolar condensates at zero and finite temperatures
• A symbiotic nondipolar droplet supersolid in a binary dipolar-nondipolar Dy-Rb mixture