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| Autori principali: | , , , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2026
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| Soggetti: | |
| Accesso online: | https://arxiv.org/abs/2602.02433 |
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| _version_ | 1866911416661835776 |
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| author | Scheie, A. Willsher, J. Ghioldi, E. A. Wang, Kevin Laurell, P. Moore, J. E. Batista, C. D. Knolle, J. Tennant, D. Alan |
| author_facet | Scheie, A. Willsher, J. Ghioldi, E. A. Wang, Kevin Laurell, P. Moore, J. E. Batista, C. D. Knolle, J. Tennant, D. Alan |
| contents | Dynamical correlations of quantum many-body systems are typically analyzed in the momentum space and frequency basis. However, quantum simulators operate more naturally in real space, real time settings. Here we analyze the real-space time-dependent van Hove spin correlations $G(r,t)$ of the 2D triangular antiferromagnet KYbSe$_2$ as obtained from high-resolution Fourier-transformed neutron spectroscopy. We compare this to $G(r,t)$ from five theoretical simulations of the well-established spin Hamiltonian. Our analysis reveals non-linear sub-ballistic low-temperature transport in KYbSe$_2$ which none of the current state-of-the-art numerical or field-theoretical methods reproduce. Our observation signals an emergent collective hydrodynamics, perhaps associated with the quantum critical phase of a quantum spin liquid, and provides an ideal benchmark for future quantum simulations. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2602_02433 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Nonlinear light cone spreading of correlations in a triangular quantum magnet: a hard quantum simulation target Scheie, A. Willsher, J. Ghioldi, E. A. Wang, Kevin Laurell, P. Moore, J. E. Batista, C. D. Knolle, J. Tennant, D. Alan Strongly Correlated Electrons Quantum Physics Dynamical correlations of quantum many-body systems are typically analyzed in the momentum space and frequency basis. However, quantum simulators operate more naturally in real space, real time settings. Here we analyze the real-space time-dependent van Hove spin correlations $G(r,t)$ of the 2D triangular antiferromagnet KYbSe$_2$ as obtained from high-resolution Fourier-transformed neutron spectroscopy. We compare this to $G(r,t)$ from five theoretical simulations of the well-established spin Hamiltonian. Our analysis reveals non-linear sub-ballistic low-temperature transport in KYbSe$_2$ which none of the current state-of-the-art numerical or field-theoretical methods reproduce. Our observation signals an emergent collective hydrodynamics, perhaps associated with the quantum critical phase of a quantum spin liquid, and provides an ideal benchmark for future quantum simulations. |
| title | Nonlinear light cone spreading of correlations in a triangular quantum magnet: a hard quantum simulation target |
| topic | Strongly Correlated Electrons Quantum Physics |
| url | https://arxiv.org/abs/2602.02433 |