{"_buckets": {"deposit": "3e5e8998-6283-4be7-9cb6-1d3947813102"}, "_deposit": {"id": "694", "owners": [], "pid": {"revision_id": 0, "type": "depid", "value": "694"}, "status": "published"}, "_oai": {"id": "oai:repository.dl.itc.u-tokyo.ac.jp:00000694"}, "item_2_biblio_info_7": {"attribute_name": "\u66f8\u8a8c\u60c5\u5831", "attribute_value_mlt": [{"bibliographicIssueDates": {"bibliographicIssueDate": "2015-06-10", "bibliographicIssueDateType": "Issued"}, "bibliographicIssueNumber": "23", "bibliographicVolumeNumber": "114", "bibliographic_titles": [{"bibliographic_title": "Physical Review Letters"}]}]}, "item_2_description_5": {"attribute_name": "\u6284\u9332", "attribute_value_mlt": [{"subitem_description": "We report on a frequency ratio measurement of a Hg199-based optical lattice clock referencing a Sr87-based clock. Evaluations of lattice light shift, including atomic-motion-dependent shift, enable us to achieve a total systematic uncertainty of 7.2\u00d710\u221217 for the Hg clock. The frequency ratio is measured to be \u03bdHg/\u03bdSr=2.629\u2009314\u2009209\u2009898\u2009909\u200960(22) with a fractional uncertainty of 8.4\u00d710\u221217, which is smaller than the uncertainty of the realization of the International System of Units (SI) second, i.e., the SI limit.", "subitem_description_type": "Abstract"}]}, "item_2_description_6": {"attribute_name": "\u5185\u5bb9\u8a18\u8ff0", "attribute_value_mlt": [{"subitem_description": "UTokyo Research\u63b2\u8f09\u300c\u6c34\u9280\u30fb\u30b9\u30c8\u30ed\u30f3\u30c1\u30a6\u30e0\u5149\u683c\u5b50\u6642\u8a08\u306e\u9ad8\u7cbe\u5ea6\u76f4\u63a5\u6bd4\u8f03\u306b\u6210\u529f\u300d URI: http://www.u-tokyo.ac.jp/ja/utokyo-research/research-news/highly-precise-comparison-of-mercury-and-strontium-optical-lattice-clocks.html", "subitem_description_type": "Other"}, {"subitem_description": "UTokyo Research \"Highly-precise comparison of mercury and strontium optical lattice clocks\" URI: http://www.u-tokyo.ac.jp/en/utokyo-research/research-news/highly-precise-comparison-of-mercury-and-strontium-optical-lattice-clocks.html", "subitem_description_type": "Other"}]}, "item_2_publisher_20": {"attribute_name": "\u51fa\u7248\u8005", "attribute_value_mlt": [{"subitem_publisher": "American Physical Society"}]}, "item_2_relation_11": {"attribute_name": "DOI", "attribute_value_mlt": [{"subitem_relation_type_id": {"subitem_relation_type_id_text": "info:doi/10.1103/PhysRevLett.114.230801", "subitem_relation_type_select": "DOI"}}]}, "item_2_relation_25": {"attribute_name": "\u95a2\u4fc2URI", "attribute_value_mlt": [{"subitem_relation_type_id": {"subitem_relation_type_id_text": "http://www.u-tokyo.ac.jp/ja/utokyo-research/research-news/highly-precise-comparison-of-mercury-and-strontium-optical-lattice-clocks.html", "subitem_relation_type_select": "URI"}}, {"subitem_relation_type_id": {"subitem_relation_type_id_text": 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{"creatorNames": [{"creatorName": "Takamoto, Masao"}], "nameIdentifiers": [{"nameIdentifier": "2518", "nameIdentifierScheme": "WEKO"}]}, {"creatorNames": [{"creatorName": "Katori, Hidetoshi"}], "nameIdentifiers": [{"nameIdentifier": "2519", "nameIdentifierScheme": "WEKO"}]}]}, "item_files": {"attribute_name": "\u30d5\u30a1\u30a4\u30eb\u60c5\u5831", "attribute_type": "file", "attribute_value_mlt": [{"accessrole": "open_date", "date": [{"dateType": "Available", "dateValue": "2017-05-30"}], "displaytype": "detail", "download_preview_message": "", "file_order": 0, "filename": "PhysRevLett.114.230801.pdf", "filesize": [{"value": "780.2 kB"}], "format": "application/pdf", "future_date_message": "", "is_thumbnail": false, "licensetype": "license_free", "mimetype": "application/pdf", "size": 780200.0, "url": {"label": "PhysRevLett.114.230801.pdf", "url": "https://repository.dl.itc.u-tokyo.ac.jp/record/694/files/PhysRevLett.114.230801.pdf"}, "version_id": 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