<div class="csl-bib-body">
<div class="csl-entry">Bippus, F., Krsnik, J., Kitatani, M., Aksamovic, L., Kauch, A., Barišić, N., & Held, K. (2025). Entanglement in the pseudogap regime of cuprate superconductors. <i>Physical Review B</i>, <i>112</i>, Article L081110. https://doi.org/10.1103/xk42-b9cx</div>
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dc.identifier.issn
2469-9950
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dc.identifier.uri
http://hdl.handle.net/20.500.12708/225061
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dc.description.abstract
We find a strongly enhanced entanglement within the pseudogap regime of the Hubbard model. This entanglement is estimated from the quantum Fisher information and, avoiding the ill-conditioned analytical continuation, the quantum variance. Both are lower bounds for the actual entanglement and can be calculated from the (antiferromagnetic) susceptibility, obtained here with the dynamical vertex approximation. Our results qualitatively agree with experimental neutron scattering experiments for various cuprates. Theory predicts a ln(1/T ) divergence of the entanglement for low temperatures T, which is however cut off by the onset of superconductivity.
en
dc.description.sponsorship
FWF - Österr. Wissenschaftsfonds
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dc.language.iso
en
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dc.publisher
AMER PHYSICAL SOC
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dc.relation.ispartof
Physical Review B
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dc.subject
pseudogap
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dc.subject
quantum entanglement
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dc.subject
cuprates
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dc.subject
Strongly correlated systems
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dc.subject
Hubbard model
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dc.title
Entanglement in the pseudogap regime of cuprate superconductors
