Radio-Frequency Spectroscopy of Ultracold Fermions

Abstract

Radio-frequency techniques were used to study ultracold fermions. We observed the absence of mean-field "clock" shifts, the dominant source of systematic error in current atomic clocks based on bosonic atoms. This is a direct consequence of fermionic antisymmetry. Resonance shifts proportional to interaction strengths were observed in a three-level system. However, in the strongly interacting regime, these shifts became very small, reflecting the quantum unitarity limit and many-body effects. This insight into an interacting Fermi gas is relevant for the quest to observe superfluidity in this system.

arXiv comment6 pages, 6 figures

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Cited by in corpus (205)

• Many-Body Physics with Ultracold Gases
• Feshbach Resonances in Ultracold Gases
• Observation of resonance condensation of fermionic atom pairs
• Observation of Bose-Einstein Condensation of Molecules
• Observation of the Pairing Gap in a Strongly Interacting Fermi Gas
• Majorana Fermions in Equilibrium and Driven Cold Atom Quantum Wires
• Probing many-body states of ultra-cold atoms via noise correlations
• Using photoemission spectroscopy to probe a strongly interacting Fermi gas
• Universal Thermodynamics of Degenerate Quantum Gases in the Unitarity Limit
• Polarons, Dressed Molecules, and Itinerant Ferromagnetism in ultracold Fermi gases
• Confinement induced molecules in a 1D Fermi gas
• Production of Long-Lived Ultracold Li2 Molecules from a Fermi gas
• Pure Gas of Optically Trapped Molecules Created from Fermionic Atoms
• Ultracold heteronuclear molecules in a 3D optical lattice
• Itinerant Ferromagnetism in a Fermi Gas of Ultracold Atoms
• Precise determination of ${}^6$Li cold collision parameters by radio-frequency spectroscopy on weakly bound molecules
• Repulsive Fermi polarons in a resonant mixture of ultracold ${}^6$Li atoms
• Molecules of Fermionic Atoms in an Optical Lattice
• Mott Insulators of Ultracold Fermionic Alkaline Earth Atoms: Underconstrained Magnetism and Chiral Spin Liquid
• Multiplet Structure of Feshbach Resonances in non-zero partial waves
• Radiofrequency spectroscopy of a strongly interacting two-dimensional Fermi gas
• Ultra-cold Polarized Fermi Gases
• BCS-BEC crossover at finite temperature for superfluid trapped Fermi atoms
• Fifty-fold improvement in the number of quantum degenerate fermionic atoms
• Bragg spectroscopy of a strongly interacting Fermi gas
• Suppression of collisional shifts in a strongly interacting lattice clock
• Pairing without Superfluidity: The Ground State of an Imbalanced Fermi Mixture
• Virial Theorem and Universality in a Unitary Fermi Gas
• Probing the excitation spectrum of a Fermi gas in the BCS-BEC crossover regime
• Tomographic RF Spectroscopy of a Trapped Fermi Gas at Unitarity
• Collective modes of trapped gases at the BEC-BCS crossover
• Itinerant Ferromagnetism in an Ultracold Atom Fermi Gas
• Strongly interacting Fermi gases with density imbalance
• Spectroscopic insensitivity to cold collisions in a two-state mixture of fermions
• Second-Scale Nuclear Spin Coherence Time of Trapped Ultracold ${}^{23}$Na${}^{40}$K Molecules
• Pairing gap and in-gap excitations in trapped fermionic superfluids
• Determination of the Fermion Pair Size in a Resonantly Interacting Superfluid
• Theory of RF-spectroscopy of strongly interacting Fermions
• Radio frequency spectroscopy of polarons in ultracold Bose gases
• Improved frequency measurement of a one-dimensional optical lattice clock with a spin-polarized fermionic ${}^{87}$Sr isotope
• Probing Interactions between Ultracold Fermions
• Transverse Demagnetization Dynamics of a Unitary Fermi Gas
• Hyperfine Coherence in the Presence of Spontaneous Photon Scattering
• Suppression of Density Fluctuations in a Quantum Degenerate Fermi Gas
• Quantum quench phase diagrams of an s-wave BCS-BEC condensate
• Radio-Frequency Transitions on Weakly-Bound Ultracold Molecules
• Spectral response and contact of the unitary Fermi gas
• Speckle Imaging of Spin Fluctuations in a Strongly Interacting Fermi Gas
• Coherence and clock shifts in ultracold Fermi gases with resonant interactions
• Quantum Noise Analysis of Spin Systems Realized with Cold Atoms
• Polarization Measurements and the Pairing Gap in the Universal Regime
• Nano-Scale `Dark State' Optical Potentials for Cold Atoms
• Realization of a Resonant Fermi Gas with a Large Effective Range
• BCS - BEC crossover at T=0: A Dynamical Mean Field Theory Approach
• Pairing and Superfluid Properties of Dilute Fermion Gases at Unitarity
• Repulsive Fermi gas in a harmonic trap: Ferromagnetism and spin textures
• Ultracold atoms and the Functional Renormalization Group
• From Optical Lattice Clocks to the Measurement of Forces in the Casimir Regime
• Ground state energy of spin-1/2 fermions in the unitary limit
• The ground state energy at unitarity
• Many Body Methods and Effective Field Theory
• Superfluidity at the BEC-BCS crossover in two-dimensional Fermi gases with population and mass imbalance
• Pseudogaps in strongly interacting Fermi gases
• Neutron matter on the lattice with pionless effective field theory
• Spin-correlation functions in ultracold paired atomic-fermion systems: sum rules, self-consistent approximations, and mean fields
• Itinerant ferromagnetism in an atomic Fermi gas: Influence of population imbalance
• Mean field thermodynamics of a spin-polarized spherically trapped Fermi gas at unitarity
• Cold dilute neutron matter on the lattice I: Lattice virial coefficients and large scattering lengths
• Repulsive Fermi Polarons and Their Induced Interactions in Binary Mixtures of Ultracold Atoms
• Time-resolved observation of competing attractive and repulsive short-range correlations in strongly interacting Fermi gases
• Spectral signatures of the Fulde-Ferrell-Larkin-Ovchinnikov order parameter in one-dimensional optical lattices
• A repulsive atomic gas in a harmonic trap on the border of itinerant ferromagnetism
• Exotic topological density waves in cold atomic Rydberg fermions
• Many-body treatment of the collisional frequency shift in fermionic atoms
• Two-component Fermi gas with a resonant interaction
• Clock shift in a strongly interacting two-dimensional Fermi gas
• Compressibility of an Ultracold Fermi Gas with Repulsive Interactions
• Single Impurity In Ultracold Fermi Superfluids
• Convergence of Eigenvector Continuation
• Physics of ultracold Fermi gases revealed by spectroscopies
• Weyl Superfluidity in a Three-dimensional Dipolar Fermi Gas
• Bulk viscosities for cold Fermi superfluids close to the unitary limit
• Creation and manipulation of Feshbach resonances with radio-frequency radiation
• Theory of radio-frequency spectroscopy of impurities in quantum gases
• Designer Spatial Control of Interactions in Ultracold Gases
• Sound modes at the BCS-BEC crossover
• Superfluidity in Three-species Mixture of Fermi Gases across Feshbach Resonances
• Observation of interference between resonant and detuned STIRAP in the adiabatic creation of ${}^{23}$Na${}^{40}$K molecules
• Clustered Wigner crystal phases of cold polar molecules in arrays of one-dimensional tubes
• Optical control of a magnetic Feshbach resonance in ultracold Fermi gases
• Resonance effects on the crossover of bosonic to fermionic superfluidity
• Thermography of the superfluid transition in a strongly interacting Fermi gas
• Detection of spatial correlations in an ultracold gas of fermions
• Adiabatic cooling of Fermions in an optical lattice
• Signatures of superfluidity for Feshbach-resonant Fermi gases
• Final-state effects in the radio frequency spectrum of strongly interacting fermions
• Itinerant ferromagnetism in an interacting Fermi gas with mass imbalance
• Imbalanced Superfluid Phase of a Trapped Fermi Gas in the BCS-BEC Crossover Regime
• Degenerate atom-molecule mixture in a cold Fermi gas
• Degenerate Fermi gas in a combined harmonic-lattice potential
• The Basis of the Second Law of Thermodynamics in Quantum Field Theory
• Popov approximation for composite bosons in the BCS-BEC crossover
• The general approach to the critical phase with coupled quasiperiodic chains
• Fully permanent magnet atom chip for Bose-Einstein condensation
• Hydrodynamic behavior in expanding thermal clouds of Rb-87
• Collisions in zero temperature Fermi gases
• Absence of heating in a uniform Fermi gas created by periodic driving
• Effect of Magnetization Inhomogeneity on Magnetic Microtraps for Atoms
• Breakdown of scale invariance in a quasi-two-dimensional Bose gas due to the presence of the third dimension
• New theoretical approaches to Bose polarons
• Precision benchmark calculations for four particles at unitarity
• Itinerant Ferromagnetism in ultracold Fermi gases
• Strain induced superconductor-insulator transition on Lieb lattice
• Probing ultra-cold Fermi atoms with a single ion
• The symmetric heavy-light ansatz
• Simple Mean-Field Theory for a Zero-Temperature Fermi Gas at a Feshbach Resonance
• A Quantum Scattering Interferometer
• Bogoliubov-de Gennes study of trapped spin-imbalanced unitary Fermi gases
• S-Wave Collisional Frequency Shift of a Fermion Clock
• Bosons and Fermions near Feshbach resonances
• Efimov states embedded in the three-body continuum
• Deviation from Universality in Collisions of Ultracold ${}^6$Li${}_2$ Molecules
• Coherence of Spin-Polarized Fermions Interacting with a Clock Laser in a Stark-Shift-Free Optical Lattice
• Pairing-gap, pseudo-gap, and no-gap phases in the radio-frequency spectra of a trapped unitary 6Li gas
• Vortex arrays in a rotating superfluid Fermi gas
• Interior gap superfluidity in a two-component Fermi gas of atoms
• Sigature of the universal super Efimov Effect: three-body contact in two dimensional Fermi gases
• Single-particle spectral functions in the normal phase of a strongly-attractive Bose-Fermi mixture
• Correlated Spin-Flip Tunneling in a Fermi Lattice Gas
• A Model for Overscreened Kondo Effect in Ultracold Fermi Gas
• Auxiliary field formalism for dilute fermionic atom gases with tunable interactions
• Detection of BCS pairing in neutral Fermi fluids via Stokes scattering: the Hebel Slichter effect
• Magnetic Tuning of the Relativistic BCS-BEC Crossover
• Radiofrequency spectroscopy of one-dimensional trapped Bose polarons: crossover from the adiabatic to the diabatic regime
• Pressure inequalities for nuclear and neutron matter
• Phonon contribution to the shear viscosity of a superfluid Fermi gas in the unitarity limit
• Phases, collective modes, and non-equilibrium dynamics of dissipative Rydberg atoms
• Strongly Interacting Atoms and Molecules in a 3D Optical Lattice
• Majorana Doublets, Flat Bands, and Dirac Nodes in s-Wave Superfluids
• Dynamical instability of a spin spiral in an interacting Fermi gas as a probe of the Stoner transition
• Dissipative realization of Kondo models
• Realization of BEC-BCS crossover physics in a compact oven-loaded magneto-optic trap apparatus
• Emergent Fermi sea in a system of interacting bosons
• Detecting $\pi$-phase superfluids with $p$-wave symmetry in a quasi-1D optical lattice
• Pauli blocking of stimulated emission in a degenerate Fermi gas
• Finite range and upper branch effects on itinerant ferromagnetism in repulsive Fermi gases: Bethe-Goldstone ladder resummation approach
• Multidimensional Spectroscopy of Time-Dependent Impurities in Ultracold Fermions
• Detection of Fermi Pairing via Electromagnetically Induced Transparency
• Breakdown of the scale invariance in the vicinity of Tonks-Girardeau gas
• Interaction energy and itinerant ferromagnetism in a strongly interacting Fermi gas in the absence of molecule formation
• Quantum Monte Carlo study of the role of p-wave interactions in ultracold repulsive Fermi gases
• Light scattering in Cooper-paired Fermi atoms
• Three-body rf association of Efimov trimers
• Momentum-resolved Raman spectroscopy of non-interacting ultracold Fermi gas
• BCS-BEC Crossover and Stability in a Nambu-Jona-Lasinio Model with Diquark-Diquark Repulsion
• Beyond mean-field corrections to the quasiparticle spectrum of superfluid Fermi gases
• Lattice gas models derived from effective field theory
• Condensate-profile asymmetry of a boson mixture in a disk-shaped harmonic trap
• Orbital hybridized topological Fulde-Ferrel superfluidity in a noncentrosymmetric optical lattice
• Pairing gaps in atomic gases at the BCS-BEC crossover
• Beyond linear response spectroscopy of ultracold Fermi gases
• Generic features of the spectrum of trapped polarized fermions
• Spin-asymmetric Josephson effect
• All-optical pump-and-probe detection of dynamical correlations in a two-dimensional Fermi gas
• Proximity effect and spatial Kibble-Zurek mechanism in atomic Fermi gases with inhomogeneous pairing interactions
• Beyond the Spin Model Approximation for Ramsey Spectroscopy
• Observation of nonlinear spin dynamics and squeezing in a BEC using dynamic decoupling
• Experimental realization of BCS-BEC crossover physics with a Fermi gas of atoms
• Radio-Frequency Manipulation of Fano-Feshbach Resonances in an Ultracold Fermi Gas of ${}^{40}$K
• Resonant scattering effect in spectroscopies of interacting atomic gases
• Crossovers in Unitary Fermi Systems
• Dynamics of quantum quenching for BCS-BEC systems in the shallow BEC regime
• Natural orbits of atomic Cooper pairs in a nonuniform Fermi gas
• Composite quasiparticles in strongly-correlated dipolar Fermi liquids
• Clock shifts in a Fermi gas interacting with a minority component: a soluble model
• Dissociation of Feshbach molecules via spin-orbit coupling in ultracold Fermi gases
• Effective control of chemical potentials by Rabi coupling with rf-fields in ultracold mixtures
• Quasiparticles, coherence and nonlinearity: exact simulations of RF-spectroscopy of strongly interacting one-dimensional Fermi gases
• Optical Lattice Modulation Spectroscopy for Spin-orbit Coupled Bosons
• Fermi condensates for dynamic imaging of electro-magnetic fields
• Topological orbital superfluid with chiral d-wave order in a rotating optical lattice
• Photoionization cross sections of ultracold ${}^{88}$Sr in ${}^1$P${}_1$ and ${}^3$S${}_1$ states at 390 nm and the resulting blue-detuned magic wavelength optical lattice clock constraints
• Modern topics in theoretical nuclear physics
• Radio Frequency Response of the Strongly Interacting Fermi Gases at Finite Temperatures
• Second-order response theory of radio-frequency spectroscopy for cold atoms
• Connecting the avoided quantum critical point to the magic-angle transition in three-dimensional Weyl semimetals
• Peaks and widths of radio-frequency spectra: An analysis of the phase diagram of ultra-cold Fermi gases
• Pauli blocking of light scattering in degenerate fermions
• Ultracold atom superfluidity induced by the Feshbach resonance
• Quantitative Probe of Pairing Correlations in a Cold Fermionic Atom Gas
• Interaction-enhanced double resonance in cold gases
• NODAL Vector solutions with clustered peaks for a nonlinear elliptic equations in ${\mathbb{R}}^3$
• Interaction effects on dynamic correlations in non-condensed Bose gases
• 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
• Coupled-cluster theory of a gas of strongly-interacting fermions in the dilute limit
• Visualizing spinon Fermi surfaces with time-dependent spectroscopy
• Quasiparticle disintegration in fermionic superfluids
• Regime of Validity of the Pairing Hamiltonian in the Study of Fermi Gases
• Momentum-resolved two-dimensional spectroscopy as a probe of nonlinear quantum field dynamics
• Repulsive fermions and shell effects on the surface of a sphere
• Structures and proximity effects of inhomogeneous population-imbalanced Fermi gases with pairing interactions
• Experimental study of magnetically insensitive transitions in ultracold Fermi gas of ${}^{40}$K
• Pair-Condensation Peak in Radio-Frequency Dimer-Projection Spectroscopy of a Unitary Fermi Gas
• Radio-frequency driving of an attractive Fermi gas in a one-dimensional optical lattice