Quantum phases of dipolar bosons in multilayer optical lattice

Abstract

We consider a minimal model to investigate the quantum phases of hardcore, polarized dipolar atoms confined in multilayer optical lattices. The model is a variant of the extended Bose-Hubbard model, which incorporates intralayer repulsion and interlayer attraction between the atoms in nearest-neighbour sites. We study the phases of this model emerging from the competition between the attractive interlayer interaction and the interlayer hopping. Our results from the analytical and cluster-Gutzwiller mean-field theories reveal that multimer formation occurs in the regime of weak intra and interlayer hopping due to the attractive interaction. In addition, intralayer isotropic repulsive interaction results in the checkerboard ordering of the multimers. This leads to an incompressible checkerboard multimer phase at half-filling. At higher interlayer hopping, the multimers are destabilized to form resonating valence-bond like states. Furthermore, we discuss the effects of thermal fluctuations on the quantum phases of the system.

16 pages, 10 figures, comments are welcome

References in corpus (23)

• Many-Body Physics with Ultracold Gases
• Quantum phase transition from a superfluid to a Mott insulator in a gas of ultracold atoms
• Ultracold atomic gases in optical lattices: mimicking condensed matter physics and beyond
• Non-standard Hubbard models in optical lattices: a review
• Supersolids versus phase separation in two-dimensional lattice bosons
• Rise and fall of hidden string order of lattice bosons
• Formation of spatial shell structures in the superfluid to Mott insulator transition
• Emergence of coherence and the dynamics of quantum phase transitions
• Metastable states of a gas of dipolar bosons in a 2D optical lattice
• Phase diagram of the extended Bose Hubbard model
• Novel quantum phases of dipolar Bose gases in optical lattices
• Many-body localization due to random interactions
• Density wave and supersolid phases of correlated bosons in an optical lattice
• Extended Bose Hubbard model of interacting bosonic atoms in optical lattices: from superfluidity to density waves
• Quantum gas microscopy with spin, atom-number and multi-layer readout
• Fractional-filling loophole insulator domains for ultracold bosons in optical superlattices
• Single-particle vs. pair superfluidity in a bilayer system of dipolar bosons
• Topological quantum critical points in the extended Bose-Hubbard model
• Quantum Criticality from in-situ Density Imaging
• Phases of dipolar bosons in a bilayer geometry
• Fluctuation driven topological transition of binary condensates in optical lattices
• Topological pump and bulk-edge-correspondence in an extended Bose-Hubbard model
• Valence bond supersolid in a bilayer extended Bose Hubbard model

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• Programmable order by disorder effect and underlying phases through dipolar quantum simulators