Stability of a unitary Bose gas

Abstract

We study the stability of a thermal ${}^{39}$K Bose gas across a broad Feshbach resonance, focusing on the unitary regime, where the scattering length $a$ exceeds the thermal wavelength $\lambda$. We measure the general scaling laws relating the particle-loss and heating rates to the temperature, scattering length, and atom number. Both at unitarity and for positive $a\ll \lambda$ we find agreement with three-body theory. However, for $a<0$ and away from unitarity, we observe significant four-body decay. At unitarity, the three-body loss coefficient, $L_3\propto {\lambda }^4$, is three times lower than the universal theoretical upper bound. This reduction is a consequence of species-specific Efimov physics and makes ${}^{39}$K particularly promising for studies of many-body physics in a unitary Bose gas.

4 pages, 5 figures

References in corpus (13)

• Weakly bound dimers of fermionic atoms
• Observation of an Efimov spectrum in an atomic system
• Three-body recombination at large scattering lengths in an ultracold atomic gas
• Observation of universality in ultracold 7Li three-body recombination
• Evidence for Universal Four-Body States Tied to an Efimov Trimer
• Universal Properties of the Four-Body System with Large Scattering Length
• Efimov Physics in Cold Atoms
• Two-dimensional dynamics of expansion of a degenerate Bose gas
• Limits on Universality in Ultracold Three-Boson Recombination
• Effects of Interactions on the Critical Temperature of a Trapped Bose Gas
• Three-Body Recombination of Identical Bosons with a Large Positive Scattering Length at Nonzero Temperature
• Ground State Properties of Cold Bosonic Atoms At Large Scattering Lengths
• Efficient Production of Large 39K Bose-Einstein Condensates

Cited by in corpus (76)

• Efimov Physics: a review
• Universal few-body physics and cluster formation
• Universal dynamics of a degenerate unitary Bose gas
• Geometric scaling of Efimov states in a ${}^6\text{Li}$-${}^{133}\text{Cs}$ mixture
• Universal Prethermal Dynamics of Bose Gases Quenched to Unitarity
• Observation of the Second Triatomic Resonance in Efimov's Scenario
• Two and Three-body Contacts in the Unitary Bose Gas
• Few-body physics in resonantly interacting ultracold quantum gases
• Quenching to unitarity: Quantum dynamics in a 3D Bose gas
• Broad universal Feshbach resonances in the chaotic spectrum of Dysprosium atoms
• Two-body and Three-body Contacts for Identical Bosons near Unitarity
• Universal Scaling Laws in the Dynamics of a Homogeneous Unitary Bose Gas
• Efimov-driven phase transitions of the unitary Bose gas
• Supplementary information to "Efimov-driven phase transitions of the unitary Bose gas"
• Observation of Efimov molecules created from a resonantly interacting Bose gas
• Quantum mixtures of ultracold gases of neutral atoms
• Strongly correlated Bose gases
• Universal Loss Dynamics in a Unitary Bose Gas
• Efimov Physics in Quenched Unitary Bose Gases
• Three-body recombination in heteronuclear mixtures at finite temperature
• Universal three-body recombination and Efimov resonances in an ultracold Li-Cs mixture
• Efimov-van-der-Waals universality for ultracold atoms with positive scattering lengths
• All optical cooling of ${}^{39}$K to Bose Einstein condensation
• Monte Carlo Simulations of the Unitary Bose Gas
• Unitarity-limited behavior of three-body collisions in a p-wave interacting Fermi gas
• Efimov correlations in strongly interacting Bose gases
• Pinpointing Feshbach Resonances and Testing Efimov Universalities in ${}^{39}$K
• Nonequilibrium States of a Quenched Bose Gas
• Incorporating exact two-body propagators for zero-range interactions into $N$-body Monte Carlo simulations
• Energy and structural properties of $N$-boson clusters attached to three-body Efimov states: Two-body zero-range interactions and the role of the three-body regulator
• Universal Bose Gases Near Resonance: A Rigorous Solution
• Weakly bound states of two- and three-boson systems in the crossover from two to three dimension
• The three-body parameter for Efimov states in lithium-6
• Ground state of a homogeneous Bose gas of hard spheres
• Fisher zeros of a unitary Bose gas
• Dynamics of a Fermi gas quenched to unitarity
• Universal Dynamics of a Degenerate Bose Gas Quenched to Unitarity
• Momentum distribution of a dilute unitary Bose gas with three-body losses
• Deep inelastic scattering on ultracold gases
• Bunching, clustering, and the buildup of few-body correlations in a quenched unitary Bose gas
• Early-time dynamics of Bose gases quenched into the strongly interacting regime
• Finite-temperature effects on a triatomic Efimov resonance in ultracold cesium
• Long-lived universal resonant Bose gases
• High Temperature Virial Expansion to Universal Quench Dynamics
• Harmonically Trapped Four-Boson System
• Enhanced n-body annihilation of dark matter and its indirect signatures
• Quantitative analysis of losses close to a d-wave open-channel Feshbach resonance in Potassium 39
• Realising a species-selective double well with multiple-radiofrequency-dressed potentials
• Stoner ferromagnetism in a thermal pseudospin-1/2 Bose gas
• Feshbach-Stabilized Insulator of Bosons in Optical Lattices
• Multiple Transitions of Coupled Atom-Molecule Bosonic Mixtures in Two Dimensions
• Two- and three-body problem with Floquet-driven zero-range interactions
• Vortex lattice in the crossover of a Bose gas from weak coupling to unitarity
• Quenched dynamics of the momentum distribution of the unitary Bose gas
• Phase separation in binary Bose mixtures at finite temperature
• Impurity in a three-dimensional unitary Bose gas
• Momentum distribution in the unitary Bose gas from first principles
• Evidences for interaction-induced Haldane fractional exclusion statistics in one and higher dimensions
• Hyperspherical-LOCV Approximation to Resonant BEC
• Equation of state and contact of a strongly interacting Bose gas in the normal state
• Spectral flow of trimer states of two heavy impurities and one light condensed boson
• Magnetic-field-induced tunability of spin Hamiltonians: Resonances and Efimov states in Yb${}_2$Ti${}_2$O${}_7$
• Stability and Anomalous Compressibility of Bose Gases Near Resonance: The scale-dependent interactions and thermal effects
• Stable production of a strongly-interacting Bose-Einstein condensate via mode-matching
• Dark solitons in the unitary Bose gas
• Two-Step Production of Resonant Bose-Einstein Condensates
• Corrections to reaction-diffusion dynamics above the upper critical dimension
• Liquid-solid transitions in the three-body hard-core model
• Tunable Molecular Interactions Near an Atomic Feshbach Resonance: Stability and Collapse of a Molecular Bose-Einstein Condensate
• Density functional theory of a trapped Bose gas with tunable scattering length: from weak-coupling to unitarity
• Interacting Bose-condensed gases
• Low-field Feshbach resonances and three-body losses in a fermionic quantum gas of ${}^{161}$Dy
• Three-body recombination near the d-wave resonance in ultracold ${}^{85}$Rb\,-${}^{87}$Rb mixtures
• The inverse-square interaction phase diagram: unitarity in the bosonic ground state
• Elastic collision rates of spin-polarized fermions in two dimensions
• First-order phase transition in atom-molecule quantum degenerate mixtures with coherent three-body recombination