{"@context":{"@vocab":"https://cir.nii.ac.jp/schema/1.0/","rdfs":"http://www.w3.org/2000/01/rdf-schema#","dc":"http://purl.org/dc/elements/1.1/","dcterms":"http://purl.org/dc/terms/","foaf":"http://xmlns.com/foaf/0.1/","prism":"http://prismstandard.org/namespaces/basic/2.0/","cinii":"http://ci.nii.ac.jp/ns/1.0/","datacite":"https://schema.datacite.org/meta/kernel-4/","ndl":"http://ndl.go.jp/dcndl/terms/","jpcoar":"https://github.com/JPCOAR/schema/blob/master/2.0/"},"@id":"https://cir.nii.ac.jp/crid/1361412890622486784.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.1007/jhep02(2020)161"}},{"identifier":{"@type":"URI","@value":"https://link.springer.com/content/pdf/10.1007/JHEP02(2020)161.pdf"}},{"identifier":{"@type":"URI","@value":"https://link.springer.com/article/10.1007/JHEP02(2020)161/fulltext.html"}},{"identifier":{"@type":"DOI","@value":"10.48550/arxiv.1912.13092"}}],"resourceType":"学術雑誌論文(journal article)","dc:title":[{"@value":"Investigation of Complex ϕ4 Theory at Finite Density in Two Dimensions Using TRG"}],"description":[{"type":"abstract","notation":[{"@value":"<jats:title>A<jats:sc>bstract</jats:sc>\n                     </jats:title><jats:p>We study the two-dimensional complex <jats:italic>ϕ</jats:italic><jats:sup>4</jats:sup> theory at finite chemical potential using the tensor renormalization group. This model exhibits the Silver Blaze phenomenon in which bulk observables are independent of the chemical potential below the critical point. Since it is expected to be a direct outcome of an imaginary part of the action, an approach free from the sign problem is needed. We study this model systematically changing the chemical potential in order to check the applicability of the tensor renormalization group to the model in which scalar fields are discretized by the Gaussian quadrature. The Silver Blaze phenomenon is successfully confirmed on the extremely large volume <jats:italic>V</jats:italic> = 1024<jats:sup>2</jats:sup> and the results are also ensured by another tensor network representation with a character expansion.</jats:p>"}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1420001326226216448","@type":"Researcher","personIdentifier":[{"@type":"KAKEN_RESEARCHERS","@value":"90447219"},{"@type":"NRID","@value":"1000090447219"},{"@type":"NRID","@value":"9000415102702"},{"@type":"NRID","@value":"9000389945630"},{"@type":"NRID","@value":"9000413506068"},{"@type":"NRID","@value":"9000413499135"},{"@type":"RESEARCHMAP","@value":"https://researchmap.jp/27182818"}],"foaf:name":[{"@value":"Daisuke Kadoh"}]},{"@id":"https://cir.nii.ac.jp/crid/1381412890622486789","@type":"Researcher","foaf:name":[{"@value":"Yoshinobu Kuramashi"}]},{"@id":"https://cir.nii.ac.jp/crid/1381412890622486788","@type":"Researcher","foaf:name":[{"@value":"Yoshifumi Nakamura"}]},{"@id":"https://cir.nii.ac.jp/crid/1381412890622486790","@type":"Researcher","foaf:name":[{"@value":"Ryo Sakai"}]},{"@id":"https://cir.nii.ac.jp/crid/1420001326211920640","@type":"Researcher","personIdentifier":[{"@type":"KAKEN_RESEARCHERS","@value":"60577881"},{"@type":"NRID","@value":"1000060577881"},{"@type":"NRID","@value":"9000252957549"},{"@type":"NRID","@value":"9000413506154"},{"@type":"NRID","@value":"9000402478598"},{"@type":"NRID","@value":"9000004738855"},{"@type":"NRID","@value":"9000004888391"},{"@type":"NRID","@value":"9000413512783"},{"@type":"NRID","@value":"9000401599310"},{"@type":"NRID","@value":"9000401598325"},{"@type":"NRID","@value":"9000413487013"},{"@type":"NRID","@value":"9000005982161"},{"@type":"NRID","@value":"9000252957273"},{"@type":"NRID","@value":"9000242098851"},{"@type":"NRID","@value":"9000003440327"},{"@type":"NRID","@value":"9000402475311"},{"@type":"NRID","@value":"9000413485251"},{"@type":"NRID","@value":"9000392702560"},{"@type":"NRID","@value":"9000392702839"},{"@type":"NRID","@value":"9000413506072"},{"@type":"NRID","@value":"9000351097675"},{"@type":"NRID","@value":"9000002405556"},{"@type":"NRID","@value":"9000257702976"},{"@type":"RESEARCHMAP","@value":"https://researchmap.jp/read0104991"}],"foaf:name":[{"@value":"Shinji Takeda"}]},{"@id":"https://cir.nii.ac.jp/crid/1381412890622486784","@type":"Researcher","foaf:name":[{"@value":"Yusuke Yoshimura"}]}],"publication":{"publicationIdentifier":[{"@type":"EISSN","@value":"10298479"}],"prism:publicationName":[{"@value":"Journal of High Energy Physics"}],"dc:publisher":[{"@value":"Springer Science and Business Media LLC"}],"prism:publicationDate":"2020-02","prism:volume":"2020","prism:number":"2","prism:startingPage":"161"},"reviewed":"false","dcterms:accessRights":"http://purl.org/coar/access_right/c_abf2","dc:rights":["https://creativecommons.org/licenses/by/4.0","https://creativecommons.org/licenses/by/4.0"],"url":[{"@id":"https://link.springer.com/content/pdf/10.1007/JHEP02(2020)161.pdf"},{"@id":"https://link.springer.com/article/10.1007/JHEP02(2020)161/fulltext.html"}],"createdAt":"2020-02-26","modifiedAt":"2021-05-04","foaf:topic":[{"@id":"https://cir.nii.ac.jp/all?q=Lattice%20Quantum%20Field%20Theory","dc:title":"Lattice Quantum Field Theory"},{"@id":"https://cir.nii.ac.jp/all?q=High%20Energy%20Physics%20-%20Lattice","dc:title":"High Energy Physics - Lattice"},{"@id":"https://cir.nii.ac.jp/all?q=Field%20Theories%20in%20Lower%20Dimensions","dc:title":"Field Theories in Lower Dimensions"},{"@id":"https://cir.nii.ac.jp/all?q=Nuclear%20and%20particle%20physics.%20Atomic%20energy.%20Radioactivity","dc:title":"Nuclear and particle physics. Atomic energy. Radioactivity"},{"@id":"https://cir.nii.ac.jp/all?q=High%20Energy%20Physics%20-%20Lattice%20(hep-lat)","dc:title":"High Energy Physics - Lattice (hep-lat)"},{"@id":"https://cir.nii.ac.jp/all?q=FOS:%20Physical%20sciences","dc:title":"FOS: Physical sciences"},{"@id":"https://cir.nii.ac.jp/all?q=QC770-798","dc:title":"QC770-798"}],"project":[{"@id":"https://cir.nii.ac.jp/crid/1040000781965600256","@type":"Project","projectIdentifier":[{"@type":"KAKEN","@value":"17K05411"},{"@type":"JGN","@value":"JP17K05411"},{"@type":"URI","@value":"https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-17K05411/"}],"notation":[{"@language":"ja","@value":"テンソルネットワーク法による素粒子物理学の諸問題へのアプローチ"},{"@language":"en","@value":"Tensor network approach to elementary particle 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