Ultracold dense gas of deeply bound heteronuclear molecules

Abstract

Recently, the quest for an ultracold and dense ensemble of polar molecules has attracted strong interest. Polar molecules have bright prospects for novel quantum gases with long-range and anisotropic interactions, for quantum information science, and for precision measurements. However, high-density clouds of ultracold polar molecules have so far not been produced. Here, we report a key step towards this goal. Starting from an ultracold dense gas of heteronuclear 40K-87Rb Feshbach molecules with typical binding energies of a few hundred kHz and a negligible dipole moment, we coherently transfer these molecules into a vibrational level of the ground-state molecular potential bound by >10 GHz. We thereby increase the binding energy and the expected dipole moment of the 40K-87Rb molecules by more than four orders of magnitude in a single transfer step. Starting with a single initial state prepared with Feshbach association, we achieve a transfer efficiency of 84%. While dipolar effects are not yet observable, the presented technique can be extended to access much more deeply bound vibrational levels and ultimately those exhibiting a significant dipole moment. The preparation of an ultracold quantum gas of polar molecules might therefore come within experimental reach.

5 pages, 5 figures

References in corpus (18)

• Quantum computation with trapped polar molecules
• Production of cold molecules via magnetically tunable Feshbach resonances
• Bose-Einstein condensation in trapped dipolar gases
• Optical Production of Ultracold Polar Molecules
• Cold Molecule Spectroscopy for Constraining the Evolution of the Fine Structure Constant
• Ultracold heteronuclear molecules in a 3D optical lattice
• A continuous source of translationally cold dipolar molecules
• Photoassociative Production and Trapping of Ultracold KRb Molecules
• Coherent optical transfer of Feshbach molecules to a lower vibrational state
• Magneto-electrostatic trapping of ground state OH molecules
• Observation of Heteronuclear Feshbach Molecules from a ${}^{85}$Rb - ${}^{87}$Rb gas
• Collisional stability of fermionic Feshbach molecules
• Heteronuclear molecules in an optical dipole trap
• Inducing an optical Feshbach resonance via stimulated Raman coupling
• The coupling of the X${}^1{\Sigma }^{+}$ and a${}^3{\Sigma }^{+}$ states of KRb
• Ab initio calculation of the KRb dipole moments
• Precise Control of Molecular Dynamics with a Femtosecond Frequency Comb - A Weak Field Route to Strong Field Coherent Control
• Cruising through molecular bound state manifolds with radio frequency

Cited by in corpus (174)

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• Cold and Ultracold Molecules: Science, Technology, and Applications
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• Ultracold Dipolar Gas of Fermionic ${}^{23}$Na${}^{40}$K Molecules in their Absolute Ground State
• Quantum Gas of Deeply Bound Ground State Molecules
• Ultracold Molecules in the Ro-Vibrational Triplet Ground State
• Quantum control of molecular rotation
• Quantum Phases of Cold Polar Molecules in 2D Optical Lattices
• Topology-Induced Spontaneous Non-reciprocal Pumping in Cold-Atom Systems with Loss
• Molecular polaritons for controlling chemistry with quantum optics
• Manipulation of Molecules with Electromagnetic Fields
• Controlling the hyperfine state of rovibronic ground-state polar molecules
• Long-lived dipolar molecules and Feshbach molecules in a 3D optical lattice
• New frontiers with quantum gases of polar molecules
• Ultracold Heteronuclear Fermi-Fermi Molecules
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• Quantum phases of a Two-Dimensional Dipolar Fermi Gas
• Ground-state properties of few dipolar bosons in a quasi-one-dimensional harmonic trap
• Giant formation rates of ultracold molecules via Feshbach Optimized Photoassociation
• Production of ultracold heteronuclear YbRb* molecules by photoassociation
• Ultracold polar molecules near quantum degeneracy
• Mean-field regime of trapped dipolar Bose-Einstein condensates in one and two dimensions
• Strongly interacting ultracold polar molecules
• Photoassociation of a Bose-Einstein Condensate near a Feshbach Resonance
• Microscopic Theory of Scattering of Weak Electromagnetic Radiation by a Dense Ensemble of Ultracold Atoms
• Universal ultracold collision rates for polar molecules of two alkali-metal atoms
• Phonon instability in two-dimensional dipolar Bose-Einstein Condensates
• Stability of dark solitons in three dimensional dipolar Bose-Einstein condensates
• Near-resonance Light Scattering from a High-density, Ultracold Atomic ${}^{87}$Rb Gas
• Dispersion of the dielectric permittivity of dense and ultracold atomic gases
• Spontaneous inhomogeneous phases in ultracold dipolar Fermi gases
• Spontaneous decay of an atom excited in a dense and disordered atomic ensemble: quantum microscopic approach
• Prospects for measuring the electric dipole moment of the electron using electrically trapped polar molecules
• Controlling a quantum gas of polar molecules in an optical lattice
• Density oscillations in trapped dipolar condensates
• Universalities in ultracold reactions of alkali polar molecules
• Fractional topological states of dipolar fermions in one-dimensional optical superlattices
• Microwave shielding of bosonic NaRb molecules
• Hybrid multi-site excitations in dipolar condensates in optical lattices
• BCS-BEC Crossover in Bilayers of Cold Fermionic Polar Molecules
• Ground-State Phase Diagram of the Two-Dimensional Extended Bose-Hubbard Model
• Faraday patterns in dipolar Bose-Einstein condensates
• Quantum Simulations of Extended Hubbard Models with Dipolar Crystals
• Formation of Ultracold NaRb Feshbach Molecules
• Ultracold molecules from ultracold atoms: a case study with the KRb molecule
• Zero Sound in Dipolar Fermi Gases
• Observation of Feshbach resonances between ultracold Na and Rb atoms
• Structure and thermochemistry of K${}_2$Rb, KRb${}_2$ and K${}_2$Rb${}_2$
• Bound States and Universality in Layers of Cold Polar Molecules
• Global analysis of data on the spin-orbit coupled $A^1{\Sigma }_u^{+}$ and $b^3{\Pi }_u$ states of Cs2
• Radio frequency association of heteronuclear Feshbach molecules
• Three-body Interactions in one Dimension
• Tunable Wigner States with Dipolar Atoms and Molecules
• Spatial distribution of optically induced atomic excitation in a dense and cold atomic ensemble
• Strong-coupling perturbation theory for the extended Bose-Hubbard model
• Formation of ultracold SrYb molecules in an optical lattice by photoassociation spectroscopy: theoretical prospects
• The hyperfine energy levels of alkali metal dimers: ground-state homonuclear molecules in magnetic fields
• Hartree-Fock-Bogoliubov Theory of Dipolar Fermi Gases
• Cavity-Enhanced Rayleigh Scattering
• Stimulating the production of deeply bound RbCs molecules with laser pulses: the role of spin-orbit coupling in forming ultracold molecules
• Density Waves in Layered Systems with Fermionic Polar Molecules
• Bose-Fermi mixtures of self-assembled filaments of fermionic polar molecules
• Ground and excited state properties of the polar and paramagnetic RbSr molecule: a comparative study
• Singlet and triplet BCS pairs in a gas of two-species fermionic polar molecules
• Formation of van der Waals molecules in buffer gas cooled magnetic traps
• Density ordering instabilities of quasi-two-dimensional fermionic polar molecules in single-layer and multi-layer configurations: exact treatment of exchange interactions
• Prospects for sympathetic cooling of molecules in electrostatic, ac and microwave traps
• Microscopic description of anisotropic low-density dipolar Bose gases in two dimensions
• Fermi surface of a trapped dipolar Fermi gas
• Seconds-scale coherence on nuclear spin transitions of ultracold polar molecules in 3D optical lattices
• Cold guided beams of water isotopologs
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• Few-Body Bound Complexes in One-dimensional Dipolar Gases and Non-Destructive Optical Detection
• Universal resonant ultracold molecular scattering
• Spontaneous interlayer superfluidity in bilayer systems of cold polar molecules
• Rotational properties of dipolar Bose-Einstein condensates confined in anisotropic harmonic potentials
• High-bandwidth transfer of phase stability through a fiber frequency comb
• Density wave instabilities of tilted fermionic dipoles in a multilayer geometry
• Single-Photon Molecular Cooling
• Efficient formation of deeply bound ultracold molecules probed by broadband detection
• Collective Motion of Polarized Dipolar Fermi Gases in the Hydrodynamic Regime
• Compressibility, zero sound, and effective mass of a fermionic dipolar gas at finite temperature
• Few-body bound state stability of dipolar molecules in two dimensions
• Bound states of Dipolar Bosons in One-dimensional Systems
• Equilibrium Phases of Tilted Dipolar Lattice Bosons
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• Ultracold nonreactive molecules in an optical lattice: connecting chemistry to many-body physics
• Phase transition from straight into twisted vortex-lines in dipolar Bose-Einstein condensates
• Multi-channel modelling of the formation of vibrationally cold polar KRb molecules
• Collective modes of monolayer, bilayer, and multilayer fermionic dipolar liquid
• Efficient conversion of closed-channel dominated Feshbach molecules of ${}^{23}$Na${}^{40}$K to their absolute ground state
• Hyperfine structure in the microwave spectra of ultracold polar molecules
• Superfluidity of flexible chains of polar molecules
• Layers of Cold Dipolar Molecules in the Harmonic Approximation
• Few-body resonances of unequal-mass systems with infinite interspecies two-body s-wave scattering length
• Resonance phenomena in ultracold dipole-dipole scattering
• Fragmented-condensate solid of dipolar excitons
• Superfluidity and Density Order in a Bilayer Extended Hubbard Model
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• Momentum distribution of the insulating phases of the extended Bose-Hubbard model
• Stability Spectroscopy of Rotons in a Dipolar Bose Gas
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• Interorbital Interactions in an SU(2)xSU(6)-Symmetric Fermi-Fermi Mixture
• Adiabatic and high-fidelity quantum gates with hybrid Rydberg-Rydberg interactions
• Enhanced association and dissociation of heteronuclear Feshbach molecules in a microgravity environment
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• Groundstate and Collective Modes of a Spin-Polarized Dipolar Bose-Einstein Condensate in a Harmonic Trap
• Microscopic derivation of multi-channel Hubbard models for ultracold nonreactive molecules in an optical lattice
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• Collective phenomena in quasi-two-dimensional fermionic polar molecules: band renormalization and excitons
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• Achieving ground-state polar molecular condensates by chainwise atom-molecule adiabatic passage
• Two-photon photoassociation spectroscopy of an ultracold heteronuclear molecule
• Anisotropic Superfluidity in the Two-Species Polar Fermi Gas
• Quantum Control of Light through an Atom-Molecule Dark State
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• Symmetry-breaking thermally induced collapse of dipolar Bose-Einstein condensates
• Theory of correlations in strongly interacting fluids of two-dimensional dipolar bosons
• Parafermion excitations in superfluid of quasi-molecular chains
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• Robustness of spin-chain state-transfer schemes
• Physical dipoles and second order perturbation theory for dipolar fermions in two dimensions
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• Solid phases and pairing in a mixture of polar molecules and atoms
• Potential energy surface of the 2A' Li2+Li doublet ground state
• Enhanced Raman sideband cooling of caesium atoms in a vapour-loaded magneto-optical trap
• Dipoles on a Two-leg Ladder
• Heteronuclear quantum gas mixtures
• Mimicking multi-channel scattering with single-channel approaches
• The Role of Interspecies Interactions in the Preparation of a Low-entropy Gas of Polar Molecules in a Lattice
• Long-range states of the NaRb molecule near the Na($3^2{S}_{1/2}$)+Rb($5^2{P}_{3/2}$) asymptote
• Chiral topological phases in optical lattices without synthetic fields
• Prospect for precision quantum logic spectroscopy of vibrational overtone transitions in molecular oxygen ions
• The Multi-component Correlated Basis Function Method and its Application to Multilayered Dipolar Bose Gases
• Second-order interaction corrections to the Fermi surface and the quasiparticle properties of dipolar fermions in three dimensions
• Thermodynamics of Dipolar Chain Systems
• Bound Chains of Tilted Dipoles in Layered Systems
• Interisotope effects in optimal dual-isotope loading into a shallow optical trap
• The influence of optical molasses in loading a shallow optical trap
• Highly Efficient Creation and Detection of Ultracold Deeply-Bound Molecules via Chainwise Stimulated Raman Shortcut-to-Adiabatic Passage
• Efficient production of polar molecular Bose-Einstein condensates via an all-optical R-type atom-molecule adiabatic passage
• Heat transfer through dipolar coupling: Sympathetic cooling without contact
• Long-range three-body atom-diatom potential for doublet Li${}_3$
• Efficiency for preforming molecules from mixtures of light Fermi and heavy Bose atoms in optical lattices: the strong-coupling-expansion method
• Classical crystal formation of dipoles in two dimensions
• Wigner crystal induced by dipole-dipole interaction in one-dimensional optical lattices
• Superfluid pairing in a mixture of a spin-polarized Fermi gas and a dipolar condensate
• Efficiency limitation for realizing an atom-molecule adiabatic transfer based on a chainwise system
• Competing Orders in a Dipolar Bose-Fermi Mixture on a Square Optical Lattice: Mean-Field Perspective
• Enhancing the Thermal Stability of Majorana Fermions with Redundancy Using Dipoles in Optical Lattices
• Particle-hole bound states of dipolar molecules in optical lattice
• Quasi-molecular bosonic complexes -- a pathway to atomic analog of SQUID with controlled sensitivity
• Optimal population transfer in combined Feshbach Resonance and STIRAP process
• Measuring molecular electric dipoles using trapped atomic ions and ultrafast laser pulses
• Highly Efficient Creation and Detection of Deeply-bound Molecules via Invariant-based Inverse Engineering with Feasible Modified Drivings
• Free Expansion of a Weakly-interacting Dipolar Fermi Gas
• Formation of deeply bound polar molecules combining pump-dump pulses with infrared radiation
• Pneumatically actuated and kinematically positioned optical mounts compatible with laser-cooling experiments
• Two-state Bogoliubov theory of a molecular Bose gas
• Frustration induced incommensurate solids in the extended Bose-Hubbard model
• Stability, Adiabaticity and Transfer efficiency in a nonlinear Λ-system
• Thermal-assisted Anisotropy and Thermal-driven Instability in the Superfluidity state of Two-Species Polar Fermi Gas
• Robust switching of superposition-states via a coherent double stimulated Raman adiabatic passage
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• Molecular regimes in ultracold Fermi gases
• Delta-Kick Collimation of Heteronuclear Feshbach Molecules