Quantum Fisher information in a strange metal

Federico Mazza; Sounak Biswas; Xinlin Yan; Andrey Prokofiev; Paul Steffens; Qimiao Si; Fakher F. Assaad; Silke Paschen

doi:10.1038/s41567-026-03298-0

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Quantum Fisher information in a strange metal

Federico Mazza, Sounak Biswas, Xinlin Yan, Andrey Prokofiev, Paul Steffens, Qimiao Si, Fakher F. Assaad, Silke Paschen

2026Nature Physics 22, 1064-1070CC BY 4.0LCP000119

Fig. 4, panel (a)

Quantum Monte Carlo QFI density $f_{\mathrm{Q}}$ of the spin degree of freedom against temperature $T$ at $J_k = 2.0$, $L = 18$, for $q = 2\pi/9$, $5\pi/9$, $7\pi/9$ and $\pi$, and for $q = \pi$ at $L = 22$ (dashed). Finite-size effects set in below the dotted line ($T = 0.08$, shaded in the print). The print's inset, a magnified view of the lowest $q = \pi$ points, is not hosted.

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This panel was reproduced from the authors' public data deposit (Zenodo: https://doi.org/10.5281/zenodo.19349955, CC BY 4.0), with the edge of the shaded finite-size region recovered from the published vector figure. The plot shown here is re-rendered for interactive viewing and analysis. See the paper for the original figure and full scientific context.

License: CC BY 4.0.

Nat. Phys. 22, 1064-1070 (2026) · DOI: 10.1038/s41567-026-03298-0

Other panels of Fig. 4: (b) (b-inset)

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