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Article: Quantum many-body simulations of the two-dimensional Fermi-Hubbard model in ultracold optical lattices
Title | Quantum many-body simulations of the two-dimensional Fermi-Hubbard model in ultracold optical lattices |
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Authors | |
Issue Date | 2021 |
Publisher | American Physical Society. The Journal's web site is located at http://journals.aps.org/prb/ |
Citation | Physical Review B: covering condensed matter and materials physics, 2021, v. 103 n. 4, p. article no. L041107 How to Cite? |
Abstract | Understanding quantum many-body states of correlated electrons is one main theme in modern condensedmatter physics. Given that the Fermi-Hubbard model, the prototype of correlated electrons, was recently realized in ultracold optical lattices, it is highly desirable to have controlled numerical methodology to provide precise finite-temperature results upon doping to directly compare with experiments. Here, we demonstrate the exponential tensor renormalization group (XTRG) algorithm [Chen et al., Plrys. Rev. X 8. 031082 (2018)], complemented by independent determinant quantum Monte Carlo, offers a powerful combination of tools for this purpose. XTRG provides full and accurate access to the density matrix and thus various spin and charge correlations, down to an unprecedented low temperature of a few percent of the tunneling energy. We observe excellent agreement with ultracold fermion measurements at both half filling and finite doping, including the sign-reversal behavior in spin correlations due to formation of magnetic polarons, and the attractive hole-doublon and repulsive hole-hole pairs that are responsible for the peculiar bunching and antibunching behaviors of the antimoments. |
Persistent Identifier | http://hdl.handle.net/10722/296304 |
ISSN | 2023 Impact Factor: 3.2 2023 SCImago Journal Rankings: 1.345 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Chen, BB | - |
dc.contributor.author | Chen, C | - |
dc.contributor.author | Chen, Z | - |
dc.contributor.author | Cui, J | - |
dc.contributor.author | Zhai, Y | - |
dc.contributor.author | Weichselbaum, A | - |
dc.contributor.author | von Delft, J | - |
dc.contributor.author | Meng, Z | - |
dc.contributor.author | Li, W | - |
dc.date.accessioned | 2021-02-22T04:53:25Z | - |
dc.date.available | 2021-02-22T04:53:25Z | - |
dc.date.issued | 2021 | - |
dc.identifier.citation | Physical Review B: covering condensed matter and materials physics, 2021, v. 103 n. 4, p. article no. L041107 | - |
dc.identifier.issn | 2469-9950 | - |
dc.identifier.uri | http://hdl.handle.net/10722/296304 | - |
dc.description.abstract | Understanding quantum many-body states of correlated electrons is one main theme in modern condensedmatter physics. Given that the Fermi-Hubbard model, the prototype of correlated electrons, was recently realized in ultracold optical lattices, it is highly desirable to have controlled numerical methodology to provide precise finite-temperature results upon doping to directly compare with experiments. Here, we demonstrate the exponential tensor renormalization group (XTRG) algorithm [Chen et al., Plrys. Rev. X 8. 031082 (2018)], complemented by independent determinant quantum Monte Carlo, offers a powerful combination of tools for this purpose. XTRG provides full and accurate access to the density matrix and thus various spin and charge correlations, down to an unprecedented low temperature of a few percent of the tunneling energy. We observe excellent agreement with ultracold fermion measurements at both half filling and finite doping, including the sign-reversal behavior in spin correlations due to formation of magnetic polarons, and the attractive hole-doublon and repulsive hole-hole pairs that are responsible for the peculiar bunching and antibunching behaviors of the antimoments. | - |
dc.language | eng | - |
dc.publisher | American Physical Society. The Journal's web site is located at http://journals.aps.org/prb/ | - |
dc.relation.ispartof | Physical Review B: covering condensed matter and materials physics | - |
dc.rights | Copyright [2021] by The American Physical Society. This article is available online at [http://dx.doi.org/10.1103/PhysRevB.103.L041107]. | - |
dc.title | Quantum many-body simulations of the two-dimensional Fermi-Hubbard model in ultracold optical lattices | - |
dc.type | Article | - |
dc.identifier.email | Meng, Z: zymeng@hku.hk | - |
dc.identifier.authority | Meng, Z=rp02524 | - |
dc.description.nature | published_or_final_version | - |
dc.identifier.doi | 10.1103/PhysRevB.103.L041107 | - |
dc.identifier.scopus | eid_2-s2.0-85100261594 | - |
dc.identifier.hkuros | 321405 | - |
dc.identifier.volume | 103 | - |
dc.identifier.issue | 4 | - |
dc.identifier.spage | article no. L041107 | - |
dc.identifier.epage | article no. L041107 | - |
dc.identifier.isi | WOS:000608618100010 | - |
dc.publisher.place | United States | - |