Realization of a doped quantum antiferromagnet in a Rydberg tweezer array
Doping an antiferromagnetic (AFM) Mott insulator is central to our understanding of a variety of phenomena in strongly correlated electrons, including high-temperature superconductors1,2. To describe the competition between tunnelling t of hole dopants and AFM spin interactions J, theoretical and nu...
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| Hauptverfasser: | , , , , , , , , , , , , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
28 August 2025
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| In: |
Nature
Year: 2025, Jahrgang: 644, Heft: 8078, Pages: 889-895 |
| ISSN: | 1476-4687 |
| DOI: | 10.1038/s41586-025-09377-1 |
| Online-Zugang: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1038/s41586-025-09377-1 Verlag, lizenzpflichtig, Volltext: https://www.nature.com/articles/s41586-025-09377-1 
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| Verfasserangaben: | Mu Qiao, Gabriel Emperauger, Cheng Chen, Lukas Homeier, Simon Hollerith, Guillaume Bornet, Romain Martin, Bastien Gély, Lukas Klein, Daniel Barredo, Sebastian Geier, Neng-Chun Chiu, Fabian Grusdt, Annabelle Bohrdt, Thierry Lahaye & Antoine Browaeys |
| Zusammenfassung: | Doping an antiferromagnetic (AFM) Mott insulator is central to our understanding of a variety of phenomena in strongly correlated electrons, including high-temperature superconductors1,2. To describe the competition between tunnelling t of hole dopants and AFM spin interactions J, theoretical and numerical studies often focus on the paradigmatic t-J model3 and the direct analogue quantum simulation of this model in the relevant regime of high-particle density has long been sought4,5. Here we realize a doped quantum antiferromagnet with next-nearest-neighbour (NNN) tunnellings t′ (refs. 6-10) and hard-core bosonic holes11 using a Rydberg tweezer platform. We use coherent dynamics between three Rydberg levels, encoding spins and holes12, to implement a tunable bosonic t-J-V model allowing us to study previously inaccessible parameter regimes. We observe dynamical phase separation between hole and spin domains for |t/J| ≪ 1 and demonstrate the formation of repulsively bound hole pairs in a variety of spin backgrounds. The interference between NNN tunnellings t′ and perturbative pair tunnelling gives rise to light and heavy pairs depending on the sign of t. Using the single-site control allows us to study the dynamics of a single hole in 2D square lattice (anti)ferromagnets. The model we implement extends the toolbox of Rydberg tweezer experiments beyond spin-1/2 models13 to a larger class of t-J and spin-1 models14,15. |
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| Beschreibung: | Online veröffentlicht: 20. August 2025 Gesehen am 21.01.2026 |
| Beschreibung: | Online Resource |
| ISSN: | 1476-4687 |
| DOI: | 10.1038/s41586-025-09377-1 |