Pairing gap and in-gap excitations in trapped fermionic superfluids

Abstract

We consider trapped atomic Fermi gases with Feshbach-resonance enhanced interactions in pseudogap and superfluid temperatures. We calculate the spectrum of RF(or laser)-excitations for transitions that transfer atoms out of the superfluid state. The spectrum displays the pairing gap and also the contribution of unpaired atoms, i.e. in-gap excitations. The results support the conclusion that a superfluid, where pairing is a many-body effect, was observed in recent experiments on RF spectroscopy of the pairing gap.

Journal version

References in corpus (7)

• Observation of resonance condensation of fermionic atom pairs
• Condensation of Pairs of Fermionic Atoms Near a Feshbach Resonance
• Observation of the Pairing Gap in a Strongly Interacting Fermi Gas
• Evidence for Superfluidity in a Resonantly Interacting Fermi Gas
• Crossover from a molecular Bose-Einstein condensate to a degenerate Fermi gas
• Collective excitations of a degenerate gas at the BEC-BCS crossover
• Signatures of superfluidity for Feshbach-resonant Fermi gases

Cited by in corpus (99)

• Many-Body Physics with Ultracold Gases
• Theory of ultracold Fermi gases
• Observation of the Pairing Gap in a Strongly Interacting Fermi Gas
• Heat Capacity of a Strongly-Interacting Fermi Gas
• Spectral Functions and rf Response of Ultracold Fermionic Atoms
• Universal Properties of the Ultra-Cold Fermi Gas
• Pairing without Superfluidity: The Ground State of an Imbalanced Fermi Mixture
• Direct Imaging of Spatially Modulated Superfluid Phases in Atomic Fermion Systems
• Tomographic RF Spectroscopy of a Trapped Fermi Gas at Unitarity
• Measurement of the Entropy and Critical Temperature of a Strongly Interacting Fermi Gas
• Strongly interacting Fermi gases with density imbalance
• Determination of the Fermion Pair Size in a Resonantly Interacting Superfluid
• Theory of RF-spectroscopy of strongly interacting Fermions
• Thermodynamic Measurements in a Strongly Interacting Fermi Gas
• Quantum quench phase diagrams of an s-wave BCS-BEC condensate
• The Finite Temperature Pairing Gap of a Unitary Fermi Gas by Quantum Monte Carlo Calculations
• Coherence and clock shifts in ultracold Fermi gases with resonant interactions
• Trapped Fermions across a Feshbach resonance with population imbalance
• Quantum Noise Analysis of Spin Systems Realized with Cold Atoms
• Probing the Spectral Function Using Momentum Resolved Radio Frequency Spectroscopy in Trapped Fermi Gases
• Pairing in a three component Fermi gas
• Disordered ultracold atomic gases in optical lattices: A case study of Fermi-Bose mixtures
• Thermodynamics of Interacting Fermions in Atomic Traps
• Single-particle excitations in a trapped gas of Fermi atoms in the BCS-BEC crossover region
• Quantum gases in trimerized kagomé lattices
• Temperature of a trapped unitary Fermi gas at finite entropy
• Pseudogaps in strongly interacting Fermi gases
• Radio frequency spectroscopy and the pairing gap in trapped Fermi gases
• Spin-correlation functions in ultracold paired atomic-fermion systems: sum rules, self-consistent approximations, and mean fields
• Ultracold two-component Fermi gases with a magnetic field gradient near a Feshbach resonance
• Conventional character of the BCS-BEC cross-over in ultra-cold gases of 40K
• Twin peaks in rf spectra of Fermi gases at unitarity
• Spectral signatures of the Fulde-Ferrell-Larkin-Ovchinnikov order parameter in one-dimensional optical lattices
• Competition between final-state and pairing-gap effects in the radio-frequency spectra of ultracold Fermi atoms
• Luther-Emery Phase and Atomic-Density Waves in a Trapped Fermion Gas
• Polarons in a Dipolar Condensate
• Comparative Study of BCS-BEC Crossover Theories above $T_c$: the Nature of the Pseudogap in Ultra-Cold Atomic Fermi Gases
• Radio frequency spectroscopy of a strongly imbalanced Feshbach-resonant Fermi gas
• Single Impurity In Ultracold Fermi Superfluids
• Theory of Radio Frequency Spectroscopy Experiments in Ultracold Fermi Gases and Their Relation to Photoemission Experiments in the Cuprates
• Physics of ultracold Fermi gases revealed by spectroscopies
• Thermodynamics and superfluid density in BCS-BEC crossover with and without population imbalance
• Applying BCS-BEC Crossover Theory To High Temperature Superconductors and Ultracold Atomic Fermi Gases
• Comparison of Different Pairing Fluctuation Approaches to BCS-BEC Crossover
• Density Profiles of Strongly Interacting Trapped Fermi Gases
• Superfluidity in Three-species Mixture of Fermi Gases across Feshbach Resonances
• Co-existence and shell structures of several superfluids in trapped three-component Fermi mixtures
• Spectroscopy of the soliton lattice formation in quasi-one-dimensional fermionic superfluids with population imbalance
• Pseudogap phenomena in ultracold atomic Fermi gases
• Imbalanced Superfluid Phase of a Trapped Fermi Gas in the BCS-BEC Crossover Regime
• Final-state effects in the radio frequency spectrum of strongly interacting fermions
• Quasi two-dimensional superfluid Fermi gases
• Sound velocity and dimensional crossover in a superfluid Fermi gas in an optical lattice
• Single-particle excitations in the BCS-BEC crossover region II: Broad Feshbach resonance
• Strain induced superconductor-insulator transition on Lieb lattice
• Pairing-gap, pseudo-gap, and no-gap phases in the radio-frequency spectra of a trapped unitary 6Li gas
• Temperature and final state effects in radio frequency spectroscopy experiments on atomic Fermi gases
• Local Photoemission Spectra and Effects of Spatial Inhomogeneity in the BCS-BEC Crossover Regime of a Trapped Ultracold Fermi Gas
• Radio Frequency Spectroscopy of Trapped Fermi Gases with Population Imbalance
• Quantum theory of an atom laser originating from a Bose-Einstein condensate or a Fermi gas in the presence of gravity
• Hartree-Fock treatment of Fermi polarons using the Lee-Low-Pine transformation
• Detection of BCS pairing in neutral Fermi fluids via Stokes scattering: the Hebel Slichter effect
• Optimal cooling strategies for magnetically trapped atomic Fermi-Bose mixtures
• Excitation picture of an interacting Bose gas
• Momentum-resolved spectroscopy of a Fermi liquid
• A simple mean field equation for condensates in the BEC-BCS crossover regime
• Detection of Fermi Pairing via Electromagnetically Induced Transparency
• Light scattering in Cooper-paired Fermi atoms
• Thermodynamic Properties of Rashba Spin-Orbit-Coupled Fermi Gas
• Probing the BCS-BEC crossover with photons in a nonlinear optical fiber
• Quantum engineering of Majorana quasiparticles in one-dimensional optical lattices
• Reentrant Superfluidity and Pair Density Wave in Single Component Dipolar Fermi Gases
• Unusual destruction and enhancement of superfluidity of atomic Fermi gases by population imbalance in a one-dimensional optical lattice
• Pairing gaps in atomic gases at the BCS-BEC crossover
• Beyond linear response spectroscopy of ultracold Fermi gases
• Coexistence of pairing gaps in three-component Fermi gases
• Generic features of the spectrum of trapped polarized fermions
• Laser cooling all the way down to molecular condensate
• Interband physics in an ultra-cold Fermi gas in an optical lattice
• Spin-asymmetric Josephson effect
• Do phase fluctuations influence the Fulde-Ferrell-Larkin-Ovchinnikov state in a 3D Fermi gas?
• Breaking and trapping Cooper pairs by Rydberg-molecule spectroscopy in atomic Fermi superfluids
• Phase slip in a superfluid Fermi gas near a Feshbach resonance
• Dominant Andreev Reflection through Nonlinear Radio-Frequency Transport
• Slow-light probe of Fermi pairing through an atom-molecule dark state
• Resonant scattering effect in spectroscopies of interacting atomic gases
• Clock shifts in a Fermi gas interacting with a minority component: a soluble model
• Quasiparticles, coherence and nonlinearity: exact simulations of RF-spectroscopy of strongly interacting one-dimensional Fermi gases
• Cold collisions in dissipative optical lattices
• Superfluidity in atomic Fermi gases
• Fermi condensates for dynamic imaging of electro-magnetic fields
• Dynamical mean-field equations for strongly interacting fermionic atoms in a potential trap
• Peaks and widths of radio-frequency spectra: An analysis of the phase diagram of ultra-cold Fermi gases
• Radio Frequency Response of the Strongly Interacting Fermi Gases at Finite Temperatures
• Radio-frequency driving of an attractive Fermi gas in a one-dimensional optical lattice
• Two-component atomic Fermi superfluid with spin-orbital coupling in thin spherical-shell geometry
• Pairing based cooling of Fermi gases
• Finite temperature effects in light scattering off Cooper-paired Fermi atoms
• What can ultracold Fermi gases teach us about high $T_c$ superconductors and vice versa?