{"created":"2025-02-21T01:53:29.526555+00:00","id":2005954,"links":{},"metadata":{"_buckets":{"deposit":"b4657090-3e33-492a-82ce-1568ed8a5da5"},"_deposit":{"created_by":41,"id":"2005954","owner":"41","owners":[41],"pid":{"revision_id":0,"type":"depid","value":"2005954"},"status":"published"},"_oai":{"id":"oai:hiroshima.repo.nii.ac.jp:02005954","sets":["1730444908512:1730444916333"]},"author_link":[],"item_1617186331708":{"attribute_name":"Title","attribute_value_mlt":[{"subitem_title":"Stability of the Friedmann Universe in the Poincaré Gauge Theory","subitem_title_language":"en"},{"subitem_title":"ポアンカレ・ゲージ理論におけるフリードマン宇宙の安定性","subitem_title_language":"ja"}]},"item_1617186419668":{"attribute_name":"Creator","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"荻野, 真介","creatorNameLang":"ja"},{"creatorName":"Ogino, Shinsuke","creatorNameLang":"en"}],"familyNames":[{"familyName":"荻野","familyNameLang":"ja"},{"familyName":"Ogino","familyNameLang":"en"}],"givenNames":[{"givenName":"真介","givenNameLang":"ja"},{"givenName":"Shinsuke","givenNameLang":"en"}]}]},"item_1617186476635":{"attribute_name":"Access Rights","attribute_value_mlt":[{"subitem_access_right":"open access","subitem_access_right_uri":"http://purl.org/coar/access_right/c_abf2"}]},"item_1617186499011":{"attribute_name":"Rights","attribute_value_mlt":[{"subitem_rights":"Copyright(c) by Author"}]},"item_1617186609386":{"attribute_name":"Subject","attribute_value_mlt":[{"subitem_subject":"450","subitem_subject_scheme":"NDC"}]},"item_1617186626617":{"attribute_name":"Description","attribute_value_mlt":[{"subitem_description":"In General Relativistic cosmology, it is well known that quantum effects due to vacuum polarization make the Friedmann universe unstable.    Here, in the Poincaré Gauge Theory, solutions of the Friedmanr universes stable against these quantum effects are obtained under linear approximation for the cases k=0, ±1 of the radiation dominant universe (RDU), the matter dominant universe (MDU) and the de Sitter universe(dSU). These solutions are small oscillations around the standard Big Bang solution of General Relativity and exist for each era of RDU, MDU and dSU, respectively, if we choose the parameters of the Poincaré Gauge Theory, the total entropy of the universe and others properly.","subitem_description_language":"en"},{"subitem_description":"Contents  §1.Introduction / p1  §2.A survey of the standard Big Bang solution of GR / p4  §3.The instability of the Friedmann universe in GR / p7  §4.The classical PGT equation for the Friedmann universe / p10  §5.The classical stable PGT solution for RDU / p12  §6.The PGT solution of RDU stable against quantum effects / p20  §7.The case of the matter dominant universe / p25  §8.The case of the de Sitter universe / p30  §9.Summary and discussions / p36  Tables / p39  Figures / p41  References / p45","subitem_description_type":"TableOfContents"}]},"item_1617186702042":{"attribute_name":"Language","attribute_value_mlt":[{"subitem_language":"eng"}]},"item_1617186819068":{"attribute_name":"Identifier Registration","attribute_value_mlt":[{"subitem_identifier_reg_text":"10.11501/3079911","subitem_identifier_reg_type":"JaLC"}]},"item_1617187024783":{"attribute_name":"Page Start","attribute_value_mlt":[{"subitem_start_page":"1"}]},"item_1617187056579":{"attribute_name":"Bibliographic Information","attribute_value_mlt":[{"bibliographicPageStart":"1"}]},"item_1617187087799":{"attribute_name":"Dissertation Number","attribute_value_mlt":[{"subitem_dissertationnumber":"乙第2445号"}]},"item_1617187112279":{"attribute_name":"Degree Name","attribute_value_mlt":[{"subitem_degreename":"博士(理学)","subitem_degreename_language":"ja"},{"subitem_degreename":"Physical Science","subitem_degreename_language":"en"}]},"item_1617187136212":{"attribute_name":"Date Granted","attribute_value_mlt":[{"subitem_dategranted":"1993-07-26"}]},"item_1617258105262":{"attribute_name":"Resource Type","attribute_value_mlt":[{"resourcetype":"doctoral thesis","resourceuri":"http://purl.org/coar/resource_type/c_db06"}]},"item_1617353299429":{"attribute_name":"Relation","attribute_value_mlt":[{"subitem_relation_name":[{"subitem_relation_name_text":"(1) Stability of the Friedmann Universe in the Poincaré Gauge Theory. (ポアンカレ・ゲージ理論におけるフリードマン宇宙の安定性) (論文誌) Progress of Theoretical Physics Volume 82, Number 4, pp. 723~736 平成元年10月出版"}],"subitem_relation_type":"references"},{"subitem_relation_name":[{"subitem_relation_name_text":"(2) Stability of the Friedmann Universe in the Poincaré Gauge Theory II. (ポアンカレ・ゲージ理論におけるフリードマン宇宙の安定性II) (論文誌) Progress of Theoretical Physics Volume 89, Number 2, pp. 371~338 平成5年2月出版"}],"subitem_relation_type":"references"},{"subitem_relation_type":"references","subitem_relation_type_id":{"subitem_relation_type_id_text":"http://dx.doi.org/10.1143/PTP.82.723","subitem_relation_type_select":"DOI"}},{"subitem_relation_type":"references","subitem_relation_type_id":{"subitem_relation_type_id_text":"http://dx.doi.org/10.1143/PTP.89.371","subitem_relation_type_select":"DOI"}}]},"item_1617605131499":{"attribute_name":"File","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_access","date":[{"dateType":"Available","dateValue":"2023-03-18"}],"displaytype":"simple","filename":"diss_otsu2445.pdf","filesize":[{"value":"19.4 MB"}],"mimetype":"application/pdf","url":{"objectType":"fulltext","url":"https://hiroshima.repo.nii.ac.jp/record/2005954/files/diss_otsu2445.pdf"},"version_id":"22250e41-ace9-4946-83c8-f1af44b09e21"}]},"item_1617944105607":{"attribute_name":"Degree Grantor","attribute_value_mlt":[{"subitem_degreegrantor":[{"subitem_degreegrantor_language":"ja","subitem_degreegrantor_name":"広島大学"}],"subitem_degreegrantor_identifier":[{"subitem_degreegrantor_identifier_name":"15401","subitem_degreegrantor_identifier_scheme":"kakenhi"}]},{"subitem_degreegrantor":[{"subitem_degreegrantor_language":"en","subitem_degreegrantor_name":"Hiroshima University"}]}]},"item_1732771732025":{"attribute_name":"旧ID","attribute_value":"31838"},"item_title":"Stability of the Friedmann Universe in the Poincaré Gauge Theory","item_type_id":"40003","owner":"41","path":["1730444916333"],"pubdate":{"attribute_name":"PubDate","attribute_value":"2023-03-18"},"publish_date":"2023-03-18","publish_status":"0","recid":"2005954","relation_version_is_last":true,"title":["Stability of the Friedmann Universe in the Poincaré Gauge Theory"],"weko_creator_id":"41","weko_shared_id":-1},"updated":"2025-02-21T01:53:44.824188+00:00"}