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Extreme Loss Suppression and Wide Tunability of Dipolar Interactions in an Ultracold Molecular Gas

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arxiv 2505.08773 v1 pith:PL5TEMWO submitted 2025-05-13 cond-mat.quant-gas physics.atm-clusphysics.atom-phquant-ph

Weijun Yuan , Siwei Zhang , Niccolò Bigagli , Haneul Kwak , Claire Warner , Tijs Karman , Ian Stevenson , Sebastian Will This is my paper
classification cond-mat.quant-gasphysics.atm-clusphysics.atom-phquant-ph
keywords dipolarinteractionsmoleculesultracolddipole-dipoleextremelossesmolecular
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

Ultracold dipolar molecules hold great promise for the creation of novel quantum states of matter, but the realization of long-lived molecular bulk samples with strong dipole-dipole interactions has remained elusive. Here, we realize a collisionally stable gas of ultracold ground state molecules with a lifetime of several seconds. Utilizing double microwave dressing, we achieve an extreme suppression of inelastic two- and three-body losses by factors of more than 10,000 and 1,000, respectively. We find that losses remain suppressed across a wide range of dipole-dipole interactions, allowing the continuous tuning of the dipolar length from 0 to 1 um $\sim$ 20,000 $a_0$. Combined with the recent realization of Bose-Einstein condensation of dipolar molecules, our findings open the door to the exploration of strongly dipolar quantum liquids.

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Cited by 11 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

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

    cond-mat.quant-gas 2026-07 conditional novelty 7.0 of 10

    Vibrational states v=0 and v=1 of microwave-shielded polar molecules form a collisionally stable pseudo-spin with tunable dipolar Ising, density-density, and spin-density interactions.

  2. Ro-vibrational van der Waals interaction between ultracold polar molecules

    cond-mat.quant-gas 2026-07 conditional novelty 7.0 of 10

    Molecules in a (v=0,j=1)+(v=1,j=0) pair feel a giant, repulsive van der Waals interaction that strongly suppresses collisional loss.

  3. Ro-vibrational van der Waals interaction between ultracold polar molecules

    cond-mat.quant-gas 2026-07 conditional novelty 7.0 of 10

    Molecules in (v,j)=(0,1) and (1,0) feel a strong ro-vibrational van der Waals repulsion, C6=d_e^4/(9α_e), that can cut collisional loss by orders of magnitude.

  4. Machine Learning Phase Field Reconstruction in a Bose-Einstein Condensate

    cond-mat.quant-gas 2026-04 unverdicted novelty 7.0 of 10

    A U-Net-based ML pipeline reconstructs the complete phase field and quantized vortex charges in 2D Bose-Einstein condensates from density snapshots alone, using synthetic training data from projected Gross-Pitaevskii ...

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

    cond-mat.quant-gas 2026-07 conditional novelty 6.0 of 10

    Microwave-shielded polar molecules in vibrational states v=0 and v=1 realize tunable Ising, density-density, and spin-density dipolar interactions with suppressed two-body losses.

  6. Equilibrium and non-equilibrium phases of microwave-dressed polar molecules beyond rotational symmetries

    cond-mat.quant-gas 2026-06 unverdicted novelty 6.0 of 10

    Microwave dressing breaks rotational symmetry in polar-molecule interactions, producing metastable droplet arrays as non-equilibrium states while suppressing the crystalline phase expected for antidipolar cases.

  7. Formation and dynamics of self-bound droplets in dipolar molecular condensate

    cond-mat.quant-gas 2026-06 unverdicted novelty 6.0 of 10

    Self-bound quantum droplets exhibit nonmonotonous dependence on non-axisymmetric DDI strength, tighter binding with more particles, collapse at low s-wave scattering length, and direction-dependent collision outcomes ...

  8. Tuning interactions between static-field-shielded polar molecules with microwaves

    cond-mat.quant-gas 2026-02 conditional novelty 6.0 of 10

    Adding a microwave field to static-field-shielded CaF molecules allows the s-wave scattering length and dipole length to be tuned over wide ranges while keeping collisional losses low.

  9. Symmetry and Self-Bound Droplets in Dipolar Molecular Gases

    cond-mat.quant-gas 2025-10 conditional novelty 6.0 of 10

    A D3 symmetry tiles the two-parameter interaction plane of microwave-dressed molecules, and this classification yields the phase diagram and scaling laws for self-bound molecular droplets.

  10. Tunable Field-Linked $s$-wave Interactions in Dipolar Fermi Mixtures

    cond-mat.quant-gas 2025-06 unverdicted novelty 6.0 of 10

    A universal s-wave resonance is accessible in dipolar fermionic spin mixtures via microwave parameters, enabling tunable interactions and tetratomic bound states without losing shielding.

  11. Strongly dipolar molecular Bose-Einstein condensates: From few- to many-body physics

    cond-mat.quant-gas 2025-12 accept novelty 3.0 of 10

    Strongly dipolar molecular BECs push dipolar quantum-gas theory past the extended Gross–Pitaevskii limit, into regimes where quantum Monte Carlo predicts droplets, superfluid membranes, and Wigner crystals.

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