Probing strongly interacting atomic gases with energetic atoms

Abstract

We investigate properties of an energetic atom propagating through strongly interacting atomic gases. The operator product expansion is used to systematically compute a quasiparticle energy and its scattering rate both in a spin-1/2 Fermi gas and in a spinless Bose gas. Reasonable agreement with recent quantum Monte Carlo simulations even at a relatively small momentum k/kF>1.5 indicates that our large-momentum expansions are valid in a wide range of momentum. We also study a differential scattering rate when a probe atom is shot into atomic gases. Because the number density and current density of the target atomic gas contribute to the forward scattering only, its contact density (measure of short-range pair correlation) gives the leading contribution to the backward scattering. Therefore, such an experiment can be used to measure the contact density and thus provides a new local probe of strongly interacting atomic gases.

35 pages, 11 figures; (v4) published with the new title

References in corpus (45)

• Many-Body Physics with Ultracold Gases
• Theory of ultracold Fermi gases
• Revealing the Superfluid Lambda Transition in the Universal Thermodynamics of a Unitary Fermi Gas
• Observation of Fermi Polarons in a Tunable Fermi Liquid of Ultracold Atoms
• Weakly bound dimers of fermionic atoms
• Using photoemission spectroscopy to probe a strongly interacting Fermi gas
• Probing Cold Dense Nuclear Matter
• Generalized Virial Theorem and Pressure Relation for a strongly correlated Fermi gas
• Molecular Probe of Pairing in the BEC-BCS Crossover
• The Equation of State of a Low-Temperature Fermi Gas with Tunable Interactions
• Observation of an Efimov spectrum in an atomic system
• Nonrelativistic conformal field theories
• Universal Quantum Viscosity in a Unitary Fermi Gas
• Observation of pseudogap behavior in a strongly interacting Fermi gas
• Exact Relations for a Strongly-interacting Fermi Gas from the Operator Product Expansion
• Verification of universal relations in a strongly interacting Fermi gas
• Feynman diagrams versus Fermi-gas Feynman emulator
• Few-body physics with ultracold atomic and molecular systems in traps
• Signatures of three-nucleon interactions in few-nucleon systems
• Evolution of Fermion Pairing from Three to Two Dimensions
• Bragg spectroscopy of a strongly interacting Fermi gas
• Number of closed-channel molecules in the BEC-BCS crossover
• Observation of atom pairs in spontaneous four wave mixing of two colliding Bose-Einstein Condensates
• Efimov Physics in Cold Atoms
• Synthetic partial waves in ultracold atomic collisions
• Efimov Resonances in Ultracold Quantum Gases
• Universal Relations for Identical Bosons from 3-Body Physics
• Universal properties of a trapped two-component Fermi gas at unitarity
• Exact Relations for a Strongly-interacting Fermi Gas near a Feshbach Resonance
• Diatomic molecules in ultracold Fermi gases - Novel composite bosons
• Imaging of s and d partial-wave interference in quantum scattering of identical bosonic atoms
• Energetics and Structural Properties of Trapped Two-Component Fermi Gases
• BEC-BCS crossover and universal relations in unitary Fermi gases
• Pseudo-gap pairing in ultracold Fermi atoms
• Momentum Distribution and Contact of the Unitary Fermi gas
• Unitary Fermi Gas in a Harmonic Trap
• BEC-BCS Crossover of a Trapped Two-Component Fermi Gas with Unequal Masses
• Collisional Properties of a Polarized Fermi Gas with Resonant Interactions
• Pair correlations of an expanding superfluid Fermi gas
• A laser based accelerator for ultracold atoms
• Universal Dimer in a Collisionally Opaque Medium: Experimental Observables and Efimov Resonances
• Pairing-gap, pseudo-gap, and no-gap phases in the radio-frequency spectra of a trapped unitary 6Li gas
• Spin diffusion in trapped clouds of strongly interacting cold atoms
• The Trapped Polarized Fermi Gas at Unitarity
• Quantum Scattering of Distinguishable Bosons using an Ultracold Atom Collider

Cited by in corpus (26)

• Nucleon Effective Masses in Neutron-Rich Matter
• Universal many-body response of heavy impurities coupled to a Fermi sea
• Precise determination of the structure factor and contact in a unitary Fermi gas
• Universal equation of state and pseudogap in the two-dimensional Fermi gas
• Observation of a smooth polaron-molecule transition in a degenerate Fermi gas
• Quantum Monte Carlo approaches to nuclear and atomic physics
• Contact and sum-rules in a near-uniform Fermi gas at unitarity
• Dynamic spin response of a strongly interacting Fermi gas
• Contact and Momentum Distribution of the Unitary Fermi Gas
• Pairing effects in the non-degenerate limit of the two-dimensional Fermi gas
• High-momentum distribution with subleading $k^{-3}$ tail in the odd-wave interacting one-dimensional Fermi gases
• The contact in the unitary Fermi gas across the superfluid phase transition
• Field-theoretical aspects of one-dimensional Bose and Fermi gases with contact interactions
• Diagrammatic Monte Carlo algorithm for the resonant Fermi gas
• Short-distance properties of Coulomb systems
• Mesoscopic spin transport between strongly interacting Fermi gases
• Tan contact and universal high momentum behavior of the fermion propagator in the BCS-BEC crossover
• Deep inelastic scattering on ultracold gases
• Single-particle spectral functions in the normal phase of a strongly-attractive Bose-Fermi mixture
• Universal Relation for the Inelastic Two-Body Loss Rate
• The Operator Product Expansion Beyond Leading Order for Two-Component Fermions
• Single-particle spectral density of the unitary Fermi gas: Novel approach based on the operator product expansion, sum rules and the maximum entropy method
• The self-energy of an impurity in an ideal Fermi gas to second order in the interaction strength
• Quasiparticle scattering rate in a strongly polarised Fermi mixture
• Energy, decay rate, and effective masses for a moving polaron in a Fermi sea: Explicit results in the weakly attractive limit
• Response function of strongly interacting Fermi gas in a virial expansion