A Mixture of Bose and Fermi Superfluids

Abstract

Superconductivity and superfluidity of fermionic and bosonic systems are remarkable many-body quantum phenomena. In liquid helium and dilute gases, Bose and Fermi superfluidity has been observed separately, but producing a mixture in which both the fermionic and the bosonic components are superfluid is challenging. Here we report on the observation of such a mixture with dilute gases of two Lithium isotopes, 6Li and 7Li. We probe the collective dynamics of this system by exciting center-of-mass oscillations that exhibit extremely low damping below a certain critical velocity. Using high precision spectroscopy of these modes we observe coherent energy exchange and measure the coupling between the two superfluids. Our observations can be captured theoretically using a sum-rule approach that we interpret in terms of two coupled oscillators.

References in corpus (9)

• Quantum phase transition from a superfluid to a Mott insulator in a gas of ultracold atoms
• Weakly bound dimers of fermionic atoms
• The Equation of State of a Low-Temperature Fermi Gas with Tunable Interactions
• Normal state of a polarized Fermi gas at unitarity
• Critical velocity for superfluid flow across the BEC-BCS crossover
• Collective Modes in a Unitary Fermi Gas across the Superfluid Phase Transition
• Study of Efimov physics in two nuclear-spin sublevels of 7Li
• Chandrasekhar-Clogston limit and critical polarization in a Fermi-Bose superfluid mixture
• Collective oscillations of a Bose-Fermi mixture: Effect of unequal mass of Bose and Fermi particles

Cited by in corpus (209)

• Roadmap on Atomtronics: State of the art and perspective
• Fermion-Mediated Interactions Between Bosonic Atoms
• Two-Element Mixture of Bose and Fermi Superfluids
• Observation of two-species vortex lattices in a mixture of mass-imbalance Bose and Fermi superfluids
• Phase Separation and Dynamics of two-component Bose-Einstein condensates
• Cooling and thermometry of atomic Fermi gases
• Strong coupling Bose polarons in a BEC
• Critical Velocity and Dissipation of an ultracold Bose-Fermi Counterflow
• The critical velocity in the BEC-BCS crossover
• Neutron Stars in the Laboratory
• Observation of magnetic solitons in two-component Bose-Einstein condensates
• Observation of a Degenerate Fermi Gas Trapped by a Bose-Einstein Condensate
• Polarons in Ultracold Fermi Superfluids
• Observation of Spin Superfluidity in a Bose Gas Mixture
• Feshbach resonances in potassium Bose-Bose mixtures
• Induced $p$-wave pairing in Bose-Fermi mixtures
• Polaronic atom-trimer continuity in three-component Fermi gases
• Resummation of diagrammatic series with zero convergence radius for strongly correlated fermions
• A dual-species Bose-Einstein condensate with attractive interspecies interactions
• Tunable Fröhlich Polarons of slow-light polaritons in a two-dimensional Bose-Einstein condensate
• Quantum turbulence in quantum gases
• Speed-ups to isothermality: Enhanced quantum thermal machines through control of the system-bath coupling
• Quantum mixtures of ultracold gases of neutral atoms
• Spin-Dipole Oscillation and Polarizability of a Binary Bose-Einstein Condensate near the Miscible-Immiscible Phase Transition
• Induced interactions in a superfluid Bose-Fermi mixture
• Low-dimensional quantum gases in curved geometries
• Probing superfluidity of Bose-Einstein condensates via laser stirring
• Quantum and thermal fluctuations in two-component Bose gases
• Connecting few-body inelastic decay to many-body correlations: a weakly coupled impurity in a resonant Fermi gas
• A new quantum gas apparatus for ultracold mixtures of K and Cs and KCs ground-state molecules
• Thermometry of a deeply degenerate Fermi gas with a Bose-Einstein condensate
• Dual-species Bose-Einstein condensate of 41K and 87Rb in a hybrid trap
• Observation of coherent quench dynamics in a metallic many-body state of fermionic atoms
• Observation of interspecies Feshbach resonances in an ultracold ${}^{39}$K-${}^{133}$Cs mixture and refinement of interaction potentials
• Breathing Mode of a BEC Repulsively Interacting with a Fermionic Reservoir
• Heavy polarons in ultracold atomic Fermi superfluids at the BEC-BCS crossover: formalism and applications
• Time-of-flight expansion of binary Bose-Einstein condensates at finite temperature
• The Landau critical velocity for a particle in a Fermi superfluid
• Critical magnetic fields in a superconductor coupled to a superfluid
• From single-particle excitations to sound waves in a box-trapped atomic Bose-Einstein condensate
• Dark-Bright Solitons in a Superfluid Bose-Fermi Mixture
• Coupled Dipole Oscillations of a Mass-Imbalanced Bose and Fermi Superfluid Mixture
• Structure and dynamics of a rotating superfluid Bose-Fermi mixture
• Calibration of Interaction Energy between Bose and Fermi Superfluids
• Counter-flow instability of a quantum mixture of two superfluids
• Quasi-particle Lifetime in a Mixture of Bose and Fermi Superfluids
• Induced pairing of fermionic impurities in a one-dimensional strongly correlated Bose gas
• Universality of weakly bound dimers and Efimov trimers close to Li-Cs Feshbach resonances
• Generalized Hartree-Fock-Bogoliubov Description of the Frohlich Polaron
• Observation of dipolar splittings in high-resolution atom-loss spectroscopy of ${}^6$Li $p$-wave Feshbach resonances
• Tunable Feshbach resonances and their spectral signatures in bilayer semiconductors
• Overlapping Bose-Einstein Condensates of ${}^{23}$Na and ${}^{133}$Cs
• Crossover polarons in a strongly interacting Fermi superfluid
• Few vs many-body physics of an impurity immersed in a superfluid of spin 1/2 attractive fermions
• Instabilities in relativistic two-component (super)fluids
• Multispecies time-dependent restricted-active-space self-consistent-field theory for ultracold atomic and molecular gases
• Suppression of Unitary Three-body Loss in a Degenerate Bose-Fermi Mixture
• Superfluidity and relaxation dynamics of a laser-stirred 2D Bose gas
• Towards Quantum Turbulence in Cold Atomic Fermionic Superfluids
• Atom-Dimer Scattering and Stability of Bose and Fermi Mixtures
• Bose-Hubbard physics in synthetic dimensions from interaction Trotterization
• All-optical production of a superfluid Bose-Fermi mixture of ${}^6$Li and ${}^7$Li
• Degenerate Raman sideband cooling of 39K
• In-medium bound states of two bosonic impurities in a one-dimensional Fermi gas
• Harmonically trapped Bose-Bose mixtures: a quantum Monte Carlo study
• Zero-Temperature Equation of State and Phase Diagram of Repulsive Fermionic Mixtures
• Long range mediated interactions in a mixed dimensional system
• Spontaneous generation of dark-bright and dark-antidark solitons upon quenching a particle-imbalanced bosonic mixture
• Stability of a Bose condensed mixture on a bubble trap
• Strongly Interacting One-Dimensional Systems with Small Mass Imbalance
• Multicomponent meson superfluids in chiral perturbation theory
• A quantum degenerate Bose-Fermi mixture of ${}^{41}$K and ${}^6$Li
• Quantum gas microscopy of a geometrically frustrated Hubbard system
• A compact experimental machine for studying tunable Bose-Bose superfluid mixtures
• Immiscible and miscible states in binary condensates in the ring geometry
• Quantum droplet in a mixture of Bose-Fermi superfluids
• Dipole dynamics of an interacting bosonic mixture
• Superfluidity of a laser-stirred Bose-Einstein condensate
• Contact interaction in an unitary ultracold Fermi gas
• Light-induced topological superconductivity in transition metal dichalcogenide monolayers
• Generation of high winding-number superfluid circulation in Bose-Einstein condensates
• A self-bound matter-wave boson-fermion quantum ball
• Spin-exchange-induced exotic superfluids in a Bose-Fermi spinor mixture
• Polaron spectroscopy of interacting Fermi systems: insights from exact diagonalization
• Enhanced visibility of the Fulde-Ferrell-Larkin-Ovchinnikov state in one dimensional Bose-Fermi mixtures near the immiscibility point
• Collective flow of fermionic impurities immersed in a Bose-Einstein Condensate
• Exotic Superconductivity Through Bosons in a Dynamical Cluster Approximation
• Mobile impurities interacting with a few one-dimensional lattice bosons
• Damping of long wavelength collective modes in spinor Bose-Fermi mixtures
• Strongly interacting Bose-Fermi mixture: mediated interaction, phase diagram and sound propagation
• Goldstino in supersymmetric Bose-Fermi mixtures in the presence of Bose Einstein condensate
• Enhanced quantum spin fluctuations in a binary Bose-Einstein condensate
• Dynamical quantum phase transitions in the one-dimensional extended Fermi-Hubbard model
• Realising a species-selective double well with multiple-radiofrequency-dressed potentials
• Sound propagation in a two-dimensional Bose gas across the superfluid transition
• Measurement of a ${}^7$Li tune-out wavelength by phase-patterned atom interferometry
• Vortex Lattices in the Bose-Fermi Superfluid Mixture
• Linear response study of collisionless spin drag
• Non-equilibrium Atomic Condensates and Mixtures: Collective Modes, Condensate Growth and Thermalization
• An impurity immersed in a double Fermi Sea
• Nonlinear optical response of resonantly driven polaron-polaritons
• Dynamics of a degenerate Cs-Yb mixture with attractive interspecies interactions
• Landau Damping in a Mixture of Bose and Fermi Superfluids
• Dipole mode of a strongly correlated one-dimensional Bose gas in a split trap: parity effect and barrier renormalization
• Spin exchange-induced spin-orbit coupling in a superuid mixture
• Pattern formation of correlated impurities subjected to an impurity-medium interaction pulse
• Thermodynamic stability, compressibility matrix, and effects of mediated interactions in a strongly-interacting Bose-Fermi mixture
• Phase separation in binary Bose mixtures at finite temperature
• Persistent currents in Bose-Bose mixtures after an interspecies interaction quench
• Collective dynamics of Fermi-Bose mixtures with an oscillating scattering length
• Rapid production of large ${}^7$Li Bose-Einstein condensates using $D_1$ gray molasses
• Single-Particle properties of a strongly-interacting Bose-Fermi mixture with mass and population imbalance
• Equilibration and Approximate Conservation Laws: Dipole Oscillations and Perfect Drag of Ultracold Atoms in a Harmonic Trap
• The self-energy of an impurity in an ideal Fermi gas to second order in the interaction strength
• Moving binary Bose-Einstein condensates in a weak random potential
• Density profiles of two-component Bose-Einstein condensates interacting with a Laguerre-Gaussian Beam
• Comprehensive classification for Bose-Fermi mixtures
• Thermodynamics of Bose gases from functional renormalization with a hydrodynamic low-energy effective action
• Fast loading of a cold mixture of Sodium and Potassium atoms from compact and versatile cold atomic beam sources
• Two-dimensional polaron spectroscopy of Fermi superfluids
• Mixture of scalar bosons and two-color fermions in one dimension: Superfluid-insulator transitions
• Tuning of non-paraxial effects of the Laguerre-Gaussian beam interacting with the two-component Bose-Einstein condensates
• Universal and anomalous behavior in the thermalization of strongly interacting harmonically trapped gas mixtures
• Observation of Optomechanical Strain in a Cold Atomic Cloud
• Insulator phases of a mixture of spinor fermions and hard-core bosons
• Polarizing the Medium: Fermion-Mediated Interactions between Bosons
• Weak-coupling to unitarity crossover in Bose-Fermi mixtures: Mixing-demixing and spontaneous symmetry breaking in trapped systems
• Goldstino spectrum in an ultracold Bose-Fermi mixture with explicitly broken supersymmetry
• An ultracold, optically trapped mixture of {87}Rb and metastable {4}He atoms
• Detecting Entrainment in Fermi-Bose Mixtures
• Bistability of Bose-Fermi mixtures
• Induced supersolidity in a Dy-Er mixture
• Dynamical Critical Behavior of an Attractive Bose-Einstein Condensate Phase Transition
• Vortex-core structure in a mixture of Bose and Fermi superfluids
• Inelastic collisions in radiofrequency-dressed mixtures of ultracold atoms
• Collective oscillations of a two-component Fermi gas on the repulsive branch
• Mean-field vs RPA calculation of the energy of an impurity immersed in a spin 1/2 superfluid
• Proximity effect and spatial Kibble-Zurek mechanism in atomic Fermi gases with inhomogeneous pairing interactions
• Single-particle Excitations and Effects of Hetero-pairing Fluctuations in a Bose-Fermi Mixture with a Feshbach Resonance
• A Non-Equilibrium Kinetic Theory for Trapped Binary Condensates
• Quasiparticle decay in a one-dimensional Bose-Fermi mixture
• Continuous phase transitions between fractional quantum Hall states and symmetry-protected topological states
• Fractional quantum Hall effect of Bose-Fermi mixtures
• Zero Temperature Holographic Superfluids with Two Competing Orders
• The cross-over from Townes solitons to droplets in a 2D Bose mixture
• Observation of state-to-state hyperfine-changing collision in a Bose-Fermi mixture of ${}^6$Li and ${}^{41}$K atoms
• Spin-asymmetric Josephson plasma oscillations
• Quantitative theory of composite fermions in Bose-Fermi mixtures at $\nu =1$
• Mass-imbalanced atoms in a hard-wall trap: an exactly solvable model with emergent $D_6$ symmetry
• Probing Goldstino excitation through the tunneling transport in a Bose-Fermi mixture with explicitly broken supersymmetry
• Spin-selective insulators in Bose-Fermi mixtures
• Dipole oscillation of a trapped Bose--Fermi-mixture gas in collisionless and hydrodynamic regimes
• Many-body exceptional points in colliding condensates
• Generalization of the Kutta-Joukowski theorem for the hydrodynamic forces acting on a quantized vortex
• Observation of a Halo Trimer in an Ultracold Bose-Fermi Mixture
• Production of dual species Bose-Einstein condensates of ${}^{39}$K and ${}^{87}$Rb
• BEC immersed in a Fermi sea: Theory of static and dynamic behavior across phase separation
• Thermodynamics and structural transition of binary atomic Bose-Fermi mixtures in box or harmonic potentials: A path-integral study
• An effective mean field theory for the coexistence of anti-ferromagnetism and superconductivity: Applications to iron-based superconductors and cold Bose-Fermi atomic mixtures
• Competing Orders in a Dipolar Bose-Fermi Mixture on a Square Optical Lattice: Mean-Field Perspective
• Boson-fermion pairing and condensation in two-dimensional Bose-Fermi mixtures
• Rotational properties of superfluid Fermi-Bose mixtures in a tight toroidal trap
• Competing instabilities at long length scales in the one-dimensional Bose-Fermi-Hubbard model at commensurate fillings
• Spectroscopic Measurement of the Softness of Ultra-Cold Atomic Collisions
• Effective p-wave Fermi-Fermi Interaction Induced by Bosonic Superfluids
• BCS-BCS crossover between atomic and molecular superfluids in a Bose-Fermi mixture
• Creation of a degenerate Bose-Bose mixture of erbium and lithium atoms
• Non-equilibrium dynamics of fluctuations in an ultra-cold atomic mixture
• Accelerating analysis of Boltzmann equations using Gaussian mixture models: Application to quantum Bose-Fermi mixtures
• Thermodynamics of adiabatic melting of solid ${}^4\mathrm{He}$ in liquid ${}^3\mathrm{He}$
• Chiral Majorana edge states in the vortex core of a $p+ip$ Fermi superfluid
• Binary superfluids: Low-energy properties and dissipative processes from spontaneous emission of massive phonons
• Mediated Interactions and Damping Effects in Superfluid Mixtures of Bose and Fermi Gases
• Superfluid density reduction and spin-imbalanced pairing in a fermionic superfluid due to dynamical boson exchange
• Dipole modes of a trapped bosonic mixture: Fate of the sum-rule approach
• Absence of Landau damping in driven three-component Bose-Einstein condensate in optical lattices
• Non-equilibrium dynamics and atom-pair coherence in strongly interacting Bose-Fermi mixtures
• Mechanical stability of resonant Bose-Fermi mixtures
• Dipole-Mode Spectrum and Hydrodynamic Crossover in a Resonantly Interacting Two-Species Fermion Mixture
• Designing Atomtronic Circuits via Superfluid Dynamics
• Tuning transport in solid-state Bose-Fermi mixtures by Feshbach resonances
• Superfluidity and coherence in uniform dipolar binary Bose mixtures
• Spin Hall mode in a trapped thermal Rashba gas
• Hydrodynamic spectrum of a superfluid in an elongated trap
• Insulator phases of Bose-Fermi mixtures induced by intraspecies next-neighbor interactions
• Exploring phonon-like interactions in one-dimensional Bose-Fermi mixtures
• Moving Bose mixtures with dipole-dipole interactions
• Performance of adiabatic melting as a method to pursue the lowest possible temperature in ${}^3$He and ${}^3$He-${}^4$He mixture at the ${}^4$He crystallization pressure
• Exotic Superfluid with Emergent flux in a one-dimensional Bose-Fermi mixture
• Tuning long-range fermion-mediated interactions in cold-atom quantum simulators
• Tellurium Spectrometer for ${}^1{\text{S}}_0-{}^1{\text{P}}_1$ Transitions in Strontium and Other Alkaline-Earth Atoms
• Coupled First-Order Transitions In A Fermi-Bose Mixture
• Vortex-lattice structures in rotating Bose-Fermi superfluid mixtures
• Ground-state phase diagram of two-component interacting bosons on a two-leg ladder
• Nonlinear dynamics of coupled superfluids
• Resonantly enhanced superconductivity mediated by spinor condensates
• Damping-free collective oscillations of a driven two-component Bose gas in optical lattices
• Thermalization of dipole oscillations in confined systems by rare collisions
• Effect of mediated interactions on a Hubbard chain in mixed-dimensional fermionic cold atoms
• Counterflow in a doubly superfluid mixture of Bosons and Fermions
• Ground-state and Excitation spectra of Bose-Fermi Mixtures in a Three-Dimensional Optical Lattice
• Miscibility-Immiscibility transition of strongly interacting bosonic mixtures in optical lattices
• Multicomponent Superfluids and Superconductors in Dense Nuclear and Quark Matter
• Spectral weight suppression in response functions of ultracold fermion-boson mixtures
• Exploring beyond-mean-field logarithmic divergences in Fermi-polaron energy
• Elementary excitations in the hybrid Bose-Fermi system induced by circularly polarized light in a two-dimensional gas of charge carriers with different masses
• Convective Boson-Fermion pairing model constructed by oscillating one-dimensional optical superlattice
• Structures and proximity effects of inhomogeneous population-imbalanced Fermi gases with pairing interactions
• Quantum Degenerate Mixtures of Cs and Yb