Efficient representation of minimally entangled typical thermal states in two dimensions via projected entangled pair states

2024
journal article
article
2
dc.abstract.enThe minimally entangled typical thermal states (METTS) are an ensemble of pure states, equivalent to the Gibbs thermal state, designed with an efficient tensor network representation in mind. In this article, we use the projected entangled pair states (PEPS) as their representation on a two-dimensional (2D) lattice. Unlike matrix product states (MPS), which for 2D systems are limited by an exponential computational barrier in the lattice size, PEPS provides a more tractable approach. To substantiate the prowess of PEPS in modeling METTS (dubbed PEPS-METTS), we benchmark it against the purification method in the context of the 2D quantum Ising model at its critical temperature. Our analysis reveals that PEPS-METTS achieves accurate results with significantly lower bond dimensions. We further corroborate this finding in the 2D Fermi-Hubbard model. At a technical level, we introduce an efficient zipper method to obtain PEPS boundary MPS needed to compute expectation values and perform sampling. The imaginary time evolution is done with the neighborhood tensor update.pl
dc.affiliationWydział Fizyki, Astronomii i Informatyki Stosowanej : Instytut Fizyki Teoretycznejpl
dc.contributor.authorSinha, Aritra - 408019 pl
dc.contributor.authorRams, Marek - 142333 pl
dc.contributor.authorDziarmaga, Jacek - 127850 pl
dc.date.accessioned2024-02-13T13:03:40Z
dc.date.available2024-02-13T13:03:40Z
dc.date.issued2024pl
dc.description.number4pl
dc.description.volume109pl
dc.identifier.articleid045136pl
dc.identifier.doi10.1103/PhysRevB.109.045136pl
dc.identifier.eissn2469-9969pl
dc.identifier.issn2469-9950pl
dc.identifier.urihttps://ruj.uj.edu.pl/xmlui/handle/item/327085
dc.languageengpl
dc.language.containerengpl
dc.rightsUdzielam licencji. Uznanie autorstwa 4.0 Międzynarodowa
dc.rights.licenceBez licencji otwartego dostępu
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/legalcode.pl
dc.subtypeArticlepl
dc.titleEfficient representation of minimally entangled typical thermal states in two dimensions via projected entangled pair statespl
dc.title.journalPhysical Review. Bpl
dc.typeJournalArticlepl
dspace.entity.typePublication
dc.abstract.enpl
The minimally entangled typical thermal states (METTS) are an ensemble of pure states, equivalent to the Gibbs thermal state, designed with an efficient tensor network representation in mind. In this article, we use the projected entangled pair states (PEPS) as their representation on a two-dimensional (2D) lattice. Unlike matrix product states (MPS), which for 2D systems are limited by an exponential computational barrier in the lattice size, PEPS provides a more tractable approach. To substantiate the prowess of PEPS in modeling METTS (dubbed PEPS-METTS), we benchmark it against the purification method in the context of the 2D quantum Ising model at its critical temperature. Our analysis reveals that PEPS-METTS achieves accurate results with significantly lower bond dimensions. We further corroborate this finding in the 2D Fermi-Hubbard model. At a technical level, we introduce an efficient zipper method to obtain PEPS boundary MPS needed to compute expectation values and perform sampling. The imaginary time evolution is done with the neighborhood tensor update.
dc.affiliationpl
Wydział Fizyki, Astronomii i Informatyki Stosowanej : Instytut Fizyki Teoretycznej
dc.contributor.authorpl
Sinha, Aritra - 408019
dc.contributor.authorpl
Rams, Marek - 142333
dc.contributor.authorpl
Dziarmaga, Jacek - 127850
dc.date.accessioned
2024-02-13T13:03:40Z
dc.date.available
2024-02-13T13:03:40Z
dc.date.issuedpl
2024
dc.description.numberpl
4
dc.description.volumepl
109
dc.identifier.articleidpl
045136
dc.identifier.doipl
10.1103/PhysRevB.109.045136
dc.identifier.eissnpl
2469-9969
dc.identifier.issnpl
2469-9950
dc.identifier.uri
https://ruj.uj.edu.pl/xmlui/handle/item/327085
dc.languagepl
eng
dc.language.containerpl
eng
dc.rights
Udzielam licencji. Uznanie autorstwa 4.0 Międzynarodowa
dc.rights.licence
Bez licencji otwartego dostępu
dc.rights.uri
http://creativecommons.org/licenses/by/4.0/legalcode.pl
dc.subtypepl
Article
dc.titlepl
Efficient representation of minimally entangled typical thermal states in two dimensions via projected entangled pair states
dc.title.journalpl
Physical Review. B
dc.typepl
JournalArticle
dspace.entity.type
Publication
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