Quantitative comparison between theoretical predictions and experimental results for the BCS-BEC crossover

Abstract

Theoretical predictions for the BCS-BEC crossover of trapped Fermi atoms are compared with recent experimental results for the density profiles of ${}^6$Li. The calculations rest on a single theoretical approach that includes pairing fluctuations beyond mean field. Excellent agreement with experimental results is obtained. Theoretical predictions for the zero-temperature chemical potential and gap at the unitarity limit are also found to compare extremely well with Quantum Monte Carlo simulations and with recent experimental results.

4 pages, 3 eps figures

References in corpus (15)

• Theory of Bose-Einstein condensation in trapped gases
• Observation of resonance condensation of fermionic atom pairs
• Condensation of Pairs of Fermionic Atoms Near a Feshbach Resonance
• Observation of a Strongly-Interacting Degenerate Fermi Gas of Atoms
• Observation of Bose-Einstein Condensation of Molecules
• Experimental Study of the BEC-BCS Crossover Region in Lithium 6
• Crossover from a molecular Bose-Einstein condensate to a degenerate Fermi gas
• Weakly bound dimers of fermionic atoms
• Superfluid Fermi Gases with Large Scattering Length
• Phase Fluctuations and Pseudogap Phenomena
• BCS-BEC crossover at finite temperature for superfluid trapped Fermi atoms
• On the correct strong-coupling limit in the evolution from BCS superconductivity to Bose-Einstein condensation
• Superfluid transition temperature in a trapped gas of Fermi atoms with a Feshbach resonance
• Resonance theory of the crossover from Bardeen-Cooper-Schrieffer superfluidity to Bose-Einstein condensation in a dilute Fermi gas
• Shrinking of a condensed fermionic cloud in a trap approaching the BEC limit

Cited by in corpus (89)

• Theory of ultracold Fermi gases
• Pairing and Phase Separation in a Polarized Fermi Gas
• Universal phase diagram of a strongly interacting Fermi gas with unbalanced spin populations
• Heat Capacity of a Strongly-Interacting Fermi Gas
• Thermodynamics of the BCS-BEC crossover
• BCS-BEC Crossover and the Unitary Fermi Gas
• The BCS-BEC crossover: From ultra-cold Fermi gases to nuclear systems
• Ultra-cold Polarized Fermi Gases
• Virial Theorem and Universality in a Unitary Fermi Gas
• The potential energy of a ${}^{40}$K Fermi gas in the BCS-BEC crossover
• Measurement of the Entropy and Critical Temperature of a Strongly Interacting Fermi Gas
• Resonant and crossover phenomena in a multiband superconductor tuning the chemical potential near a band edge
• Anisotropic Fermi Superfluid via p-wave Feshbach Resonance
• Large-N expansion for unitary superfluid Fermi gases
• Particle distribution tail and related energy formula
• Condensate Fraction of a Fermi Gas in the BCS-BEC Crossover
• Ground state energy of dilute neutron matter at next-to-leading order in lattice chiral effective field theory
• Extended Thomas-Fermi Density Functional for the Unitary Fermi Gas
• Quantum Phase Transition in the BCS-to-BEC Evolution of p-wave Fermi Gases
• The ground state energy at unitarity
• Ground state energy of spin-1/2 fermions in the unitary limit
• Lattice methods for strongly interacting many-body systems
• Lattice Monte Carlo calculations for unitary fermions in a finite box
• Self-consistent theory for molecular instabilities in a normal degenerate Fermi gas in the BEC-BCS crossover
• Radio frequency spectroscopy and the pairing gap in trapped Fermi gases
• Evidence from quantum Monte Carlo of large gap superfluidity and BCS-BEC crossover in double electron-hole layers
• Shape resonance for the anisotropic superconducting gaps near a Lifshitz transition: the effect of electron hopping between layers
• Macroscopic Periodic Tunneling of Fermi Atoms in the BCS-BEC Crossover
• 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
• Effective Nonlinear Schrödinger Equations for Cigar-Shaped and Disk-Shaped Fermi Superfluids at Unitarity
• Possible Fano resonance for high Tc multi-gap superconductivity in p-Terphenyl doped by K at the Lifshitz transition
• Three-body problem for ultracold atoms in quasi-one-dimensional traps
• Expansion of a Fermi Cloud in the BCS-BEC Crossover
• Applying BCS-BEC Crossover Theory To High Temperature Superconductors and Ultracold Atomic Fermi Gases
• Thermodynamics and superfluid density in BCS-BEC crossover with and without population imbalance
• Comparison of Different Pairing Fluctuation Approaches to BCS-BEC Crossover
• Sound modes at the BCS-BEC crossover
• Modified Fermi-sphere, pairing gap and critical temperature for the BCS-BEC crossover
• Four-body problem and BEC-BCS crossover in a quasi-one-dimensional cold fermion gas
• Condensate Fraction of a Two-Dimensional Attractive Fermi Gas
• Ultracold atoms at unitarity within quantum Monte Carlo
• Dilute neutron matter on the lattice at next-to-leading order in chiral effective field theory
• Theory of Superfluids with Population Imbalance: Finite Temperature and BCS-BEC Crossover Effects
• Lifshitz transitions and zero point lattice fluctuations in sulfur hydride showing near room temperature superconductivity
• Density functional theory for fermions close to the unitary regime
• Comparison between a diagrammatic theory for the BCS-BEC crossover and Quantum Monte Carlo results
• Condensed phase of Bose-Fermi mixtures with a pairing interaction
• Low-temperature thermodynamics of the unitary Fermi gas: superfluid fraction, first sound and second sound
• Precision benchmark calculations for four particles at unitarity
• Fermi-Bose mixture across a Feshbach resonance
• Simple Mean-Field Theory for a Zero-Temperature Fermi Gas at a Feshbach Resonance
• The symmetric heavy-light ansatz
• Comparative study of the finite-temperature thermodynamics of a unitary Fermi gas
• Ground-state fidelity in the BCS-BEC crossover
• Surface Effects in the Unitary Fermi Gas
• Stability of fermionic Feshbach molecules in a Bose-Fermi mixture
• Trapped Resonant Fermions above Superfluid Transition Temperature
• BCS-BEC crossover in a trapped Fermi super-fluid using a density-functional equation
• Renormalized mean-field theory for a two-component Fermi gas with s-wave interactions
• Pairing Symmetry in the Anisotropic Fermi Superfluid under p-wave Feshbach Resonance
• Spin-orbit coupling controlling the superconducting dome of artificial superlattices of quantum wells
• Mean-Field vs Monte-Carlo equation of state for the expansion of a Fermi superfluid in the BCS-BEC crossover
• Fermionic ground state at unitarity and Haldane Exclusion Statistics
• Multigaps superconductivity at unconventional Lifshitz transition in a 3D Rashba heterostructure at atomic limit
• Resonant multigap superconductivity at room temperature near a Lifshitz topological transition in sulfur hydrides
• BEC-BCS crossover of a trapped Fermi gas without using the local density approximation
• Superfluid Condensate Fraction and Pairing Wave Function of the Unitary Fermi Gas
• Low-momentum ring diagrams of neutron matter at and near the unitary limit
• High-Tc superconducting dome in artificial heterostructures made of nanoscale quantum building blocks
• QCD-like phase diagram with Efimov trimers and Cooper pairs in resonantly interacting SU(3) Fermi gases
• Fermions at unitarity and Haldane Exclusion Statistics
• Unitarity potentials and neutron matter at the unitary limit
• Dressed-molecules in resonantly-interacting ultracold atomic Fermi gases
• The Contact in the BCS-BEC crossover for finite range interacting ultracold Fermi gases
• Generalized Galitskii approach for the vertex function of a Fermi gas with resonant interaction
• Condensation Energy of a Spin-1/2 Strongly Interacting Fermi Gas
• Bose-Fermi Mixtures Near an Interspecies Feshbach Resonance: Testing a Non Equilibrium Approach
• Feshbach Resonances and Medium Effects in ultracold atomic Gases
• Cold atoms at unitarity and inverse square interaction
• Quantum Many-Body Calculations using Body-Centered Cubic Lattices
• Dipolar Bose-Einstein condensate for large scattering length
• Critical temperature in the BCS-BEC crossover with spin-orbit coupling
• The Fermionic Density-functional at Feshbach Resonance
• Unitary limit and linear scaling of neutrons in harmonic trap with tuned CD-Bonn and square-well interactions
• Mediated Interactions and Damping Effects in Superfluid Mixtures of Bose and Fermi Gases
• Superfluid-Normal Quantum Phase Transitions in an Imbalanced Fermi Gas
• An Effective Series Expansion to the Equation of State of Unitary Fermi Gases
• Pairing fluctuation effects in a strongly coupled color superfluid/superconductor