Measuring spectral functions of doped magnets with Rydberg tweezer arrays
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arXiv
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| Format: | Preprint |
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2026
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| author | Martin, Romain Qiao, Mu Morera, Ivan Homeier, Lukas Gély, Bastien Klein, Lukas Chew, Yuki Torii Barredo, Daniel Lahaye, Thierry Demler, Eugene Browaeys, Antoine |
| author_facet | Martin, Romain Qiao, Mu Morera, Ivan Homeier, Lukas Gély, Bastien Klein, Lukas Chew, Yuki Torii Barredo, Daniel Lahaye, Thierry Demler, Eugene Browaeys, Antoine |
| contents | Spectroscopic measurements of single-particle spectral functions provide crucial insight into strongly correlated quantum matter by resolving the energy and spatial structure of elementary excitations. Here we introduce a spectroscopic protocol for single-charge injection with simultaneous spatial and energy resolution in a Rydberg tweezer array, effectively emulating scanning tunneling microscopy. By combining this protocol with single-atom-resolved imaging, we go beyond conventional spectroscopy by not only measuring the single-particle spectral function but also directly imaging the microscopic structure of the excitations underlying spectral resonances in frustrated $tJ$ Hamiltonians. We reveal resonances associated with the formation of bound magnetic polarons -- composite quasiparticles consisting of a mobile hole bound to a magnon -- and directly extract their binding energy, spatial extent, and spin character. Finally, by exploiting the spatial tunability of our platform, we measure the local density of states across different lattice geometries. Our work establishes Rydberg tweezer arrays as a powerful platform for spectroscopic studies of strongly correlated models, offering microscopic control and direct real-space access to emergent quasiparticles in engineered quantum matter. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2602_17600 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Measuring spectral functions of doped magnets with Rydberg tweezer arrays Martin, Romain Qiao, Mu Morera, Ivan Homeier, Lukas Gély, Bastien Klein, Lukas Chew, Yuki Torii Barredo, Daniel Lahaye, Thierry Demler, Eugene Browaeys, Antoine Quantum Gases Strongly Correlated Electrons Quantum Physics Spectroscopic measurements of single-particle spectral functions provide crucial insight into strongly correlated quantum matter by resolving the energy and spatial structure of elementary excitations. Here we introduce a spectroscopic protocol for single-charge injection with simultaneous spatial and energy resolution in a Rydberg tweezer array, effectively emulating scanning tunneling microscopy. By combining this protocol with single-atom-resolved imaging, we go beyond conventional spectroscopy by not only measuring the single-particle spectral function but also directly imaging the microscopic structure of the excitations underlying spectral resonances in frustrated $tJ$ Hamiltonians. We reveal resonances associated with the formation of bound magnetic polarons -- composite quasiparticles consisting of a mobile hole bound to a magnon -- and directly extract their binding energy, spatial extent, and spin character. Finally, by exploiting the spatial tunability of our platform, we measure the local density of states across different lattice geometries. Our work establishes Rydberg tweezer arrays as a powerful platform for spectroscopic studies of strongly correlated models, offering microscopic control and direct real-space access to emergent quasiparticles in engineered quantum matter. |
| title | Measuring spectral functions of doped magnets with Rydberg tweezer arrays |
| topic | Quantum Gases Strongly Correlated Electrons Quantum Physics |
| url | https://arxiv.org/abs/2602.17600 |