Precision Measurements on a Tunable Mott Insulator of Ultracold Atoms

Abstract

We perform precision measurements on a Mott-insulator quantum state of ultracold atoms with tunable interactions. We probe the dependence of the superfluid-to-Mott-insulator transition on the interaction strength and explore the limits of the standard Bose-Hubbard model description. By tuning the on-site interaction energies to values comparable to the interband separation, we are able to quantitatively measure number-dependent shifts in the excitation spectrum caused by effective multi-body interactions.

4 pages, 4 figures

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• Quantum quench in an atomic one-dimensional Ising chain
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• Suppressing the loss of ultracold molecules via the continuous quantum Zeno effect
• Bloch oscillations in the absence of a lattice
• Emergence of multi-body interactions in few-atom sites of a fermionic lattice clock
• Ultracold bosons with short-range interaction in regular optical lattices
• Equation of state of the two-dimensional Hubbard model
• Multi-orbital and density-induced tunneling of bosons in optical lattices
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• Mott Transition for Strongly-Interacting 1D Bosons in a Shallow Periodic Potential
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• Observation of Density-Induced Tunneling
• Exact diagonalization of the one dimensional Bose-Hubbard model with local 3-body interactions
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• A new quantum gas apparatus for ultracold mixtures of K and Cs and KCs ground-state molecules
• Three body on-site interactions in ultracold bosonic atoms in optical lattices and superlattices
• Mott insulator of strongly interacting two-dimensional excitons
• First order phase transitions in optical lattices with tunable three-body onsite interaction
• Excitation spectra of many-body systems by linear response: General theory and applications to trapped condensates
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• Effective renormalized multi-body interactions of harmonically confined ultracold neutral bosons
• Dynamics of cold bosons in optical lattices: Effects of higher Bloch bands
• Evaporative cooling of reactive polar molecules confined in a two-dimensional geometry
• Two-body repulsive bound pairs in multi-body interacting Bose-Hubbard model
• Quantum Criticality and Population Trapping of Fermions by Non-Equilibrium Lattice Modulations
• Interplay between coherent and dissipative dynamics of bosonic doublons in an optical lattice
• SU(N) magnetism with ultracold molecules
• Excitation spectra of fragmented condensates by linear response: General theory and application to a condensate in a double-well potential
• Quench Dynamics of Finite Bosonic Ensembles in Optical Lattices with Spatially Modulated Interactions
• Beyond the Hubbard bands in strongly correlated lattice bosons
• Orbital-driven melting of a bosonic Mott insulator in a shaken optical lattice
• Twonniers: Interaction-induced effects on Bose-Hubbard parameters
• Mott-Insulator-Aided Detection of Ultra-Narrow Feshbach Resonances
• Three-body forces and Efimov physics in nuclei and atoms
• One-dimensional Bose-Hubbard model with local three-body interactions
• Few-body states of bosons interacting with a heavy quantum impurity
• Theoretical Description of Coherent Doublon Creation via Lattice Modulation Spectroscopy
• Quantum walks of interacting Mott insulator defects with three-body interactions
• Analytical solution for the spectrum of two ultracold atoms in a completely anisotropic confinement
• Variational Bose-Hubbard model revisited
• Critical Temperature of Interacting Bose Gases in Periodic Potentials
• Three-body interacting dipolar bosons and the fate of lattice supersolidity
• Quantum phase transition in a shallow one-dimensional optical lattice
• Studying the low-entropy Mott transition of bosons in a three-dimensional optical lattice by measuring the full momentum-space density
• Identifying strongly correlated supersolid states on the optical lattice by quench-induced π-states
• Effective multi-body SU($N$)-symmetric interactions of ultracold fermionic atoms on a 3-D lattice
• Mott insulator phases of non-locally coupled bosons in bilayer optical superlattices
• Staggered quantum phases of dipolar bosons at finite temperatures
• Zero-temperature phase diagram of hard sphere bosons in asymmetric three dimensional optical lattices
• Accessing finite momentum excitations of the one-dimensional Bose-Hubbard model using superlattice modulation spectroscopy
• Exploring the Strongly-Interacting Regime of Effective Multi-Body Interactions in a Trapped Ultracold Atom System
• Different atom trapping geometries with time averaged adiabatic potentials
• Strong-coupling RPA theory of a Bose gas near the superfluid--Mott-insulator transition: universal thermodynamics and two-body contact
• Lattice-enabled detection of spin-dependent three-body interactions
• Theoretical Analysis on Spectroscopy of Atomic Bose-Hubbard Systems
• Finite size effects and Hofstadter butterfly in a bosonic Mott insulator with relativistic dispersion background
• A self-consistent Hartree-Fock approach for interacting bosons in optical lattices
• $p$-band stability of ultracold atom gas in anharmonic optical lattice potential with large energy scales
• Signatures of Bose-Einstein condensation in an optical lattice
• Miscibility-Immiscibility transition of strongly interacting bosonic mixtures in optical lattices