Two-Body Contact Dynamics in a Bose Gas near a Fano-Feshbach Resonance
arXiv:2509.03567 · doi:10.1103/prf8-3q27
Abstract
We investigate the real-time buildup of short-range correlations in a nondegenerate ultracold Bose gas near a narrow Fano-Feshbach resonance. Using rapid optical control, we quench the closed-channel molecular energy to resonance on submicrosecond timescales and track the evolution of the two-body contact through photodissociation losses. Repeated pulse sequences enhance sensitivity to early-time two-body losses and reveal long-lived coherence between atom pairs and molecular states. The observed dynamics are accurately reproduced by our dynamical two-channel zero-range theory, which explicitly accounts for the resonance's narrow width and finite closed-channel decay, establishing a predictive framework for correlation dynamics in quantum gases near Fano-Feshbach resonances.
References in corpus (70)
- Feshbach Resonances in Ultracold Gases
- Probing many-body dynamics on a 51-atom quantum simulator
- Collapse and Revival of the Matter Wave Field of a Bose-Einstein Condensate
- Large momentum part of fermions with large scattering length
- Energetics of a strongly correlated Fermi gas
- Atom--Molecule Coherence in a Bose-Einstein Condensate
- Generalized Virial Theorem and Pressure Relation for a strongly correlated Fermi gas
- Molecular Probe of Pairing in the BEC-BCS Crossover
- Ultrafast many-body interferometry of impurities coupled to a Fermi sea
- Exact Relations for a Strongly-interacting Fermi Gas from the Operator Product Expansion
- Contact Measurements on Atomic BEC
- Observation of universal dynamics in a spinor Bose gas far from equilibrium
- Universal dynamics of a degenerate unitary Bose gas
- Three-boson problem near a narrow Feshbach resonance
- Observation of universal dynamics in an isolated one-dimensional Bose gas far from equilibrium
- Number of closed-channel molecules in the BEC-BCS crossover
- Universal Properties of the Ultra-Cold Fermi Gas
- Controlling a magnetic Feshbach resonance with laser light
- Resonant Fermi gases with a large effective range
- Universal Prethermal Dynamics of Bose Gases Quenched to Unitarity
- Very high precision bound state spectroscopy near a Rb Feshbach resonance
- Exact relations for quantum-mechanical few-body and many-body problems with short-range interactions in two and three dimensions
- Two-dimensional dynamics of expansion of a degenerate Bose gas
- General relations for quantum gases in two and three dimensions. II. Bosons and mixtures
- Lifetime of the Bose Gas with Resonant Interactions
- Non-equilibrium quantum dynamics and formation of the Bose polaron
- Universal Relations for Identical Bosons from 3-Body Physics
- Emergence of chaotic scattering in ultracold Er and Dy
- Two and Three-body Contacts in the Unitary Bose Gas
- Exact Relations for a Strongly-interacting Fermi Gas near a Feshbach Resonance
- Probing the core of the strong nuclear interaction
- The nuclear contacts and short range correlations in nuclei
- Scale and Scheme Independence and Position-Momentum Equivalence of Nuclear Short-Range Correlations
- Quenching to unitarity: Quantum dynamics in a 3D Bose gas
- Quantum Monte Carlo approaches to nuclear and atomic physics
- Two-body and Three-body Contacts for Identical Bosons near Unitarity
- Universal Scaling Laws in the Dynamics of a Homogeneous Unitary Bose Gas
- Observation of Efimov molecules created from a resonantly interacting Bose gas
- Experimental evaluation of the nuclear neutron-proton contact
- Dynamics of correlations in a dilute Bose gas following an interaction quench
- Anisotropic polarizability of erbium atoms
- Bound-state signatures in quenched Bose-Einstein condensates
- Two-field optical methods to control magnetic Feshbach resonances
- Efimov Physics in Quenched Unitary Bose Gases
- Many-body Chemical Reactions in a Quantum Degenerate Gas
- Quantum Simulation of Ultrafast Dynamics Using Trapped Ultracold Atoms
- Anisotropic light-shift and magic-polarization of the intercombination line of Dysprosium atoms in a far-detuned dipole trap
- Cumulant theory of the unitary Bose gas: Prethermal and Efimovian dynamics
- Tan's two-body contact across the superfluid transition of a planar Bose gas
- Universal Dynamics of a Degenerate Bose Gas Quenched to Unitarity
- Three-body interaction near a narrow two-body zero crossing
- Early-time dynamics of Bose gases quenched into the strongly interacting regime
- The strongly driven Fermi polaron
- Effective scattering and Efimov physics in the presence of two-body dissipation
- High Temperature Virial Expansion to Universal Quench Dynamics
- Many Bosons in a Narrow Magnetic Feshbach Resonance
- Production and stabilization of a spin mixture of ultracold dipolar Bose gases
- Two- and three-body problem with Floquet-driven zero-range interactions
- Maximum Energy Growth Rate in Dilute Quantum Gases
- A compact and fast magnetic coil for the interaction manipulation of quantum gases with Feshbach resonances
- Measurement of the dynamic polarizability of Dy atoms near the 626-nm intercombination line
- Loss features in ultracold Dy gases: two- versus three-body processes
- Evolution of the unitary Bose gas for broad to narrow Feshbach resonances
- Universal coherent atom-molecule oscillations in the dynamics of the unitary Bose gas near a narrow Feshbach resonance
- Photo-excitation measurement of Tan's contact for a strongly interacting Fermi gas
- Universal quantum dynamics of Bose polarons
- Stability and Dynamics of Atom-Molecule Superfluids Near a Narrow Feshbach Resonance
- Resonance triplet dynamics in the quenched unitary Bose gas
- Quench Dynamics of Thermal Bose Gases Across Wide and Narrow Feshbach
- Observation of coherent oscillations in association of dimers from a thermal gas of ultracold atoms