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  • Letter
  • Open Access

Realizing multiband states with ultracold dipolar quantum simulators

Yuliya Bilinskaya1,*, Michael Hughes2, and Paolo Molignini1,†

  • *Contact author: yubi9221@student.su.se
  • †Contact author: paolo.molignini@fysik.su.se
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Phys. Rev. Research 6, L042024 – Published 24 October, 2024

DOI: https://doi.org/10.1103/PhysRevResearch.6.L042024

Abstract

The manipulation of dipolar interactions within ultracold molecular ensembles represents a pivotal advancement in experimental physics, aiming at the emulation of quantum phenomena unattainable through mere contact interactions. Our study uncovers regimes of multiband occupation which allow to probe more realistic, complex long-range interacting lattice models with ultracold dipolar simulators. By mapping out experimentally relevant ranges of potential depths, interaction strengths, particle fillings, and geometric configurations, we calculate the agreement between the state prepared in the quantum simulator and a target lattice state. We do so by separately calculating numerically exact many-body wave functions in the continuous space and single- or multiband lattice representations, and building their many-body state overlaps. Our findings reveal that for shallow lattices and stronger interactions above half filling, multiband population increases, resulting in fundamentally different ground states than the ones observed in simple lowest-band descriptions, e.g., striped vs checkerboard states. A wide range of probed parameter regimes in its turn provides a systematic and quantitative blueprint for realizing multiband states with two-dimensional quantum simulators employing ultracold dipolar molecules.

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Phys. Rev. Research 6, L042024– Published 24 October, 2024
  • Received 18 March 2024
  • Revised 19 August 2024
  • Accepted 30 September 2024
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