Quantum Fisher information in a strange metal
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arXiv
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| Auteurs principaux: | , , , , , , , |
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| Format: | Preprint |
| Publié: |
2024
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| _version_ | 1866913039183249408 |
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| author | Mazza, Federico Biswas, Sounak Yan, Xinlin Prokofiev, Andrey Steffens, Paul Si, Qimiao Assaad, Fakher F. Paschen, Silke |
| author_facet | Mazza, Federico Biswas, Sounak Yan, Xinlin Prokofiev, Andrey Steffens, Paul Si, Qimiao Assaad, Fakher F. Paschen, Silke |
| contents | A strange metal is an exotic state of correlated quantum matter; intensive efforts are ongoing to decipher its nature. Here we explore whether the quantum Fisher information (QFI), a concept from quantum metrology, can provide new insight. We use inelastic neutron scattering and quantum Monte Carlo simulations to study a Kondo destruction quantum critical point, where strange metallicity is associated with fluctuations beyond a Landau order parameter. We find that the QFI probed away from magnetic Bragg peaks, where the effect of magnetic ordering is minimized, increases strongly and without a characteristic scale as the strange metal forms with decreasing temperature, evidencing its unusual entanglement properties. Our work opens a new direction for studies across strange metal platforms. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2403_12779 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Quantum Fisher information in a strange metal Mazza, Federico Biswas, Sounak Yan, Xinlin Prokofiev, Andrey Steffens, Paul Si, Qimiao Assaad, Fakher F. Paschen, Silke Strongly Correlated Electrons A strange metal is an exotic state of correlated quantum matter; intensive efforts are ongoing to decipher its nature. Here we explore whether the quantum Fisher information (QFI), a concept from quantum metrology, can provide new insight. We use inelastic neutron scattering and quantum Monte Carlo simulations to study a Kondo destruction quantum critical point, where strange metallicity is associated with fluctuations beyond a Landau order parameter. We find that the QFI probed away from magnetic Bragg peaks, where the effect of magnetic ordering is minimized, increases strongly and without a characteristic scale as the strange metal forms with decreasing temperature, evidencing its unusual entanglement properties. Our work opens a new direction for studies across strange metal platforms. |
| title | Quantum Fisher information in a strange metal |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2403.12779 |