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PreprintCC BY 4.0arXiv

Tunable state-dependent interactions in collisionally stable mixtures of polar molecules

  • Hubert J. Jóźwiak
  • Hanwei Yang
  • Eugen Dizer
  • Arthur Christianen
  • Tijs Karman
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Abstract

We propose encoding a pseudo-spin-1/2 system in the ground (v=0) and first excited (v=1) vibrational states of polar molecules. Double microwave shielding simultaneously shields molecules in both states, suppressing two-body losses by orders of magnitude while strictly avoiding three-body recombination. The microwave dressing is state-dependent and results in highly tunable, long-range dipolar Ising exchange (Jz), density-density (V), and spin-density (W) interactions. These interaction length scales readily exceed the typical interparticle spacing, pushing the molecules deep into the strongly interacting regime. In bulk gases, this enables the exploration of itinerant quantum magnetism and quantum droplets with novel anisotropic spin textures; in optical lattices, it naturally realizes extended Hubbard and t-Jz models, opening new directions in quantum simulation.

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Cite

BibTeXRIS
BibTeX
@misc{jozwiak2026tunable,
  title = {{Tunable state-dependent interactions in collisionally stable mixtures of polar molecules}},
  author = {Hubert J. Jóźwiak and Hanwei Yang and Eugen Dizer and Arthur Christianen and Tijs Karman},
  howpublished = {arXiv},
  year = {2026},
  month = oct,
  doi = {10.48550/arxiv.2607.25777},
  eprint = {2607.25777},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2607.25777},
  note = {CC BY 4.0},
}
RIS
TY  - UNPB
TI  - Tunable state-dependent interactions in collisionally stable mixtures of polar molecules
AU  - Hubert J. Jóźwiak
AU  - Hanwei Yang
AU  - Eugen Dizer
AU  - Arthur Christianen
AU  - Tijs Karman
PY  - 2026
DA  - 2026/10/20
PB  - arXiv
DO  - 10.48550/arxiv.2607.25777
UR  - https://arxiv.org/abs/2607.25777
AB  - We propose encoding a pseudo-spin-1/2 system in the ground (v=0) and first excited (v=1) vibrational states of polar molecules. Double microwave shielding simultaneously shields molecules in both states, suppressing two-body losses by orders of magnitude while strictly avoiding three-body recombination. The microwave dressing is state-dependent and results in highly tunable, long-range dipolar Ising exchange (J_z), density-density (V), and spin-density (W) interactions. These interaction length scales readily exceed the typical interparticle spacing, pushing the molecules deep into the strongly interacting regime. In bulk gases, this enables the exploration of itinerant quantum magnetism and quantum droplets with novel anisotropic spin textures; in optical lattices, it naturally realizes extended Hubbard and t-J_z models, opening new directions in quantum simulation.
ER  -