<div class="csl-bib-body">
<div class="csl-entry">Roósz, G., Kauch, A. K., Bippus, F., Wieser, D., & Held, K. (2024). Two-site reduced density matrix from one- and two-particle Green’s functions. <i>Physical Review B</i>, <i>110</i>(7), Article 075115. https://doi.org/10.1103/PhysRevB.110.075115</div>
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dc.identifier.issn
2469-9950
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dc.identifier.uri
http://hdl.handle.net/20.500.12708/209090
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dc.description.abstract
Strongly correlated electron systems are challenging to calculate, and entanglement in such systems is not widely analyzed. We present an approach that can be used as a postprocessing step for calculating the two-site reduced density matrix and from it entanglement measures such as the mutual information and entanglement negativity. Input is only the one- and two-particle Green's function, which is the output of numerous many-body methods. As an illustration, we present results for a toy model, the Hubbard model on a 2×2 cluster and a six-site ring.
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
strongly correlated electron systems
en
dc.subject
entanglement
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dc.subject
Two-site reduced density matrix
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dc.title
Two-site reduced density matrix from one- and two-particle Green's functions
