Strongly dipolar gases in a one-dimensional lattice: Bloch oscillations and matter-wave localization
arXiv:2205.03280 · doi:10.1038/s42005-022-01009-8
Abstract
Three-dimensional quantum gases of strongly dipolar atoms can undergo a crossover from a dilute gas to a dense macrodroplet, stabilized by quantum fluctuations. Adding a one-dimensional optical lattice creates a platform where quantum fluctuations are still unexplored, and a rich variety of new phases may be observable. We employ Bloch oscillations as an interferometric tool to assess the role quantum fluctuations play in an array of quasi-two-dimensional Bose-Einstein condensates. Long-lived oscillations are observed when the chemical potential is balanced between sites, in a region where a macrodroplet is extended over several lattice sites. Further, we observe a transition to a state that is localized to a single lattice planedriven purely by interactionsmarked by the disappearance of the interference pattern in the momentum distribution. To describe our observations, we develop a discrete one-dimensional extended Gross-Pitaevskii theory, including quantum fluctuations and a variational approach for the on-site wavefunction. This model is in quantitative agreement with the experiment, revealing the existence of single and multisite macrodroplets, and signatures of a two-dimensional bright soliton.
12 pages, 4+4 figures
References in corpus (24)
- Many-Body Physics with Ultracold Gases
- Quantum phase transition from a superfluid to a Mott insulator in a gas of ultracold atoms
- Bose-Einstein Condensation of Erbium
- Quantum liquid droplets in a mixture of Bose-Einstein condensates
- Self-bound droplets of a dilute magnetic quantum liquid
- Quantum-fluctuation-driven crossover from a dilute Bose-Einstein condensate to a macro-droplet in a dipolar quantum fluid
- Transient supersolid properties in an array of dipolar quantum droplets
- Stabilizing a purely dipolar quantum gas against collapse
- Long-lived and transient supersolid behaviors in dipolar quantum gases
- Non-standard Hubbard models in optical lattices: a review
- Long-lived Bloch oscillations with bosonic Sr atoms and application to gravity measurement at micrometer scale
- Control of Interaction-Induced Dephasing of Bloch Oscillations
- Anisotropic solitons in dipolar Bose-Einstein Condensates
- Atom interferometry with a weakly-interacting Bose Einstein condensate
- Magnetic dipolar interaction in an atomic Bose Einstein condensate interferometer
- Beyond Lee-Huang-Yang description of self-bound Bose mixtures
- Quantum phase transitions of polar molecules in bilayer systems
- Single-particle vs. pair superfluidity in a bilayer system of dipolar bosons
- Collisions of anisotropic two-dimensional bright solitons in dipolar Bose-Einstein condensates
- Accurate determination of the scattering length of erbium atoms
- Engineering Bright Matter-Wave Solitons of Dipolar Condensates
- Relaxation of the collective magnetization of a dense 3D array of interacting dipolar S=3 atoms
- Infinite dipolar droplet -- a simple theory for the macro-droplet regime
- Bright dipolar Bose-Einstein condensate soliton mobile in a direction perpendicular to polarization
Cited by in corpus (5)
- Tunable itinerant spin dynamics with polar molecules
- Dark quantum droplets and solitary waves in beyond-mean-field Bose-Einstein condensate mixtures
- Supersolid Stacks in Antidipolar Bose-Einstein Condensates
- Modulational instability and discrete quantum droplets in a deep quasi-one-dimensional optical lattice
- Transport of magnetically sensitive atoms in a magnetic environment