Two and Three-body Contacts in the Unitary Bose Gas

Abstract

In many-body systems governed by pairwise contact interactions, a wide range of observables is linked by a single parameter, the two-body contact, which quantifies two-particle correlations. This profound insight has transformed our understanding of strongly interacting Fermi gases. Here, using Ramsey interferometry, we study coherent evolution of the resonantly interacting Bose gas, and show that it cannot be explained by only pairwise correlations. Our experiments reveal the crucial role of three-body correlations arising from Efimov physics, and provide a direct measurement of the associated three-body contact.

4 pages, 4 figures and Supplementary Materials of 7 pages, 4 figures

References in corpus (10)

• Observation of an Efimov spectrum in an atomic system
• Time dependent impurity in ultracold fermions: orthogonality catastrophe and beyond
• Feshbach resonances in ultracold K(39)
• Two-dimensional dynamics of expansion of a degenerate Bose gas
• Universal Relations for Identical Bosons from 3-Body Physics
• Theory of RF-spectroscopy of strongly interacting Fermions
• Coherence and clock shifts in ultracold Fermi gases with resonant interactions
• Radio-frequency dressing of multiple Feshbach resonances
• Strongly correlated Bose gases
• Efficient Production of Large 39K Bose-Einstein Condensates

Cited by in corpus (45)

• Quantum depletion of a homogeneous Bose-Einstein condensate
• Spectral response and contact of the unitary Fermi gas
• Few-body Bose gases in low dimensions -- a laboratory for quantum dynamics
• Universal Scaling Laws in the Dynamics of a Homogeneous Unitary Bose Gas
• Emergence of isotropy and dynamic scaling in 2D wave turbulence in a homogeneous Bose gas
• Observing the two-dimensional Bose glass in an optical quasicrystal
• Life and death of the Bose polaron
• Pinpointing Feshbach Resonances and Testing Efimov Universalities in ${}^{39}$K
• Ground-state properties of unitary bosons: from clusters to matter
• Bose-Einstein condensation of Efimovian triples in the unitary Bose gas
• Few-body correlations in two-dimensional Bose and Fermi ultracold mixtures
• Dynamics of a Fermi gas quenched to unitarity
• Sigature of the universal super Efimov Effect: three-body contact in two dimensional Fermi gases
• Three-body bound states in antiferromagnetic spin ladders
• Bunching, clustering, and the buildup of few-body correlations in a quenched unitary Bose gas
• A simplified approach to the repulsive Bose gas from low to high densities and its numerical accuracy
• Pair formation in quenched unitary Bose gases
• Measuring nonlocal three-body spatial correlations with Rydberg trimers in ultracold quantum gases
• Tan's contact as an indicator of completeness and self-consistency of a theory
• Suppression of Bogoliubov momentum pairing and emergence of non-Gaussian correlations in ultracold interacting Bose gases
• Complex scaling flows in the quench dynamics of interacting particles
• On the survival of the quantum depletion of a condensate after release from a magnetic trap
• Dynamical excitation processes and correlations of three-body two-dimensional mixtures
• Interferometry of Efimov states in thermal gases by modulated magnetic fields
• Critical behavior of Tan's contact for bosonic systems with a fixed chemical potential
• Polaritons for testing the universality of an impurity in a Bose-Einstein condensate
• Universal quantum dynamics of Bose polarons
• Observation of a Halo Trimer in an Ultracold Bose-Fermi Mixture
• Loosely Bound Few-Body States in a Spin-1 Gas with Near-Degenerate Continua
• Resonance triplet dynamics in the quenched unitary Bose gas
• Three-body contact for fermions. I. General relations
• Dynamic virial theorem at nonequilibrium and applications
• Effects of Efimov states on quench dynamics in a three-boson trapped system
• Energetics of three interacting mass-imbalanced bodies in a three-dimensional spherical harmonic trap
• Two-Body Contact Dynamics in a Bose Gas near a Fano-Feshbach Resonance
• An efficient high-current circuit for fast radio-frequency spectroscopy in cold atomic gases
• Two-Step Production of Resonant Bose-Einstein Condensates
• Non-equilibrium dynamics and atom-pair coherence in strongly interacting Bose-Fermi mixtures
• Two-body contact of a Bose gas near the superfluid--Mott-insulator transition
• Exploring kinetically induced bound states in triangular lattices with ultracold atoms: spectroscopic approach
• Dimer-projection contact and the clock shift of a unitary Fermi gas
• Interaction quenches in Bose gases studied with a time-dependent hypernetted-chain Euler-Lagrange method
• Engineering long-range and multi-body interactions via global kinetic constraints
• Probing non-Gaussian correlations through entanglement generation in a many-body quantum system
• First and second sound in a compressible 3D Bose fluid