Density Oscillations Induced by Individual Ultracold Two-Body Collisions
arXiv:1812.09243 · doi:10.1103/PhysRevLett.122.083401
Abstract
Access to single-particle momenta provides new means of studying the dynamics of a few interacting particles. In a joint theoretical and experimental effort, we observe and analyze the effects of a finite number of ultracold two-body collisions on the relative and single-particle densities by quenching two ultracold atoms with an initial narrow wave packet into a wide trap with an inverted aspect ratio. The experimentally observed spatial oscillations of the relative density are reproduced by a parameter-free zero-range theory and interpreted in terms of cross-dimensional flux. We theoretically study the long-time dynamics and find that the system does not approach its thermodynamic limit. The setup can be viewed as an advanced particle collider that allows one to watch the collision process itself.
arXiv comment5 pages and 6 figures in the main text. 4 pages and 5 figures in the supplemental material
References in corpus (30)
- Many-Body Physics with Ultracold Gases
- Theory of ultracold Fermi gases
- Relaxation in a Completely Integrable Many-Body Quantum System: An Ab Initio Study of the Dynamics of the Highly Excited States of Lattice Hard-Core Bosons
- Probing the relaxation towards equilibrium in an isolated strongly correlated 1D Bose gas
- Relaxation and Pre-thermalization in an Isolated Quantum System
- Global hyperon polarization in nuclear collisions: evidence for the most vortical fluid
- Non-equilibrium coherence dynamics in one-dimensional Bose gases
- Breakdown of thermalization in finite one-dimensional systems
- Deterministic Preparation of a Tunable Few-Fermion System
- Generalized HydroDynamics on an Atom Chip
- Precise characterization of ^6Li Feshbach resonances using trap-sideband resolved RF spectroscopy of weakly bound molecules
- Thermalization near integrability in a dipolar quantum Newton's cradle
- Observation of universal dynamics in an isolated one-dimensional Bose gas far from equilibrium
- Observation of p-wave Threshold Law Using Evaporatively Cooled Fermionic Atoms
- Spin-resolved single-atom imaging of Li in free space
- Analytical solutions for the dynamics of two trapped interacting ultracold atoms
- Quenching to unitarity: Quantum dynamics in a 3D Bose gas
- Two atoms in an anisotropic harmonic trap
- Incomplete thermalization from trap-induced integrability breaking: lessons from classical hard rods
- Memory of the Initial Conditions in an Incompletely-Chaotic Quantum System: Universal Predictions and an Application to Cold Atoms
- Bound-state signatures in quenched Bose-Einstein condensates
- Non-Equilibrium Thermodynamics of Harmonically Trapped Bosons
- Quantum dynamics of two trapped bosons following infinite interaction quenches
- Expansion of harmonically trapped interacting particles and time dependence of the contact
- Ballistic quench-induced correlation waves in ultracold gases
- Two Cold Atoms in a Time-Dependent Harmonic Trap in One Dimension
- Relaxation Processes in Clouds of Trapped Bosons above the Bose-Einstein Condensation Temperature
- Cross-Dimensional relaxation in Bose-Fermi mixtures
- Broken scale-invariance in time-dependent trapping potentials
- Restricted Thermalization for Two Interacting Atoms in a Multimode Harmonic Waveguide
Cited by in corpus (17)
- Few-body Bose gases in low dimensions -- a laboratory for quantum dynamics
- Universal aspects of a strongly interacting impurity in a dilute Bose condensate
- Multichannel interactions of two atoms in an optical tweezer
- In-situ Imaging of a Single-Atom Wave Packet in Continuous Space
- Few-body correlations in two-dimensional Bose and Fermi ultracold mixtures
- Analytical treatment of the interaction quench dynamics of two bosons in a two-dimensional harmonic trap
- Super-resolved imaging of a single cold atom on a nanosecond timescale
- Stationary and dynamical properties of two harmonically trapped bosons in the crossover from two dimensions to one
- Exploring integrability-chaos transition with a sequence of independent perturbations
- Two-body quench dynamics of harmonically trapped interacting particles
- Analytical solution for the spectrum of two ultracold atoms in a completely anisotropic confinement
- Magnetic properties and quench dynamics of two interacting ultracold molecules in a trap
- Quench dynamics of mass-imbalanced three-body fermionic systems in a spherical trap
- Laser Control of Singlet-Pairing Process in an Ultracold Spinor Mixture
- Effects of Efimov states on quench dynamics in a three-boson trapped system
- Quantum chaos in a harmonic waveguide with scatterers
- Arbitrary interaction quench phenomena in harmonically trapped two-body systems