{"_buckets": {"deposit": "0aa5b8ec-5a29-4434-b449-abea33b9eba4"}, "_deposit": {"created_by": 1, "id": "876", "owners": [1], "pid": {"revision_id": 0, "type": "depid", "value": "876"}, "status": "published"}, "_oai": {"id": "oai:ir.soken.ac.jp:00000876", "sets": ["19"]}, "author_link": ["0", "0", "0"], "item_1_biblio_info_21": {"attribute_name": "書誌情報（ソート用）", "attribute_value_mlt": [{"bibliographicIssueDates": {"bibliographicIssueDate": "2008-09-30", "bibliographicIssueDateType": "Issued"}, "bibliographic_titles": [{}]}]}, "item_1_creator_2": {"attribute_name": "著者名", "attribute_type": "creator", "attribute_value_mlt": [{"creatorNames": [{"creatorName": "LOUIS, Sebastien Gerald Roland "}], "nameIdentifiers": [{"nameIdentifier": "0", "nameIdentifierScheme": "WEKO"}]}]}, "item_1_creator_3": {"attribute_name": "フリガナ", "attribute_type": "creator", "attribute_value_mlt": [{"creatorNames": [{"creatorName": "セバスチャン, ルイス "}], "nameIdentifiers": [{"nameIdentifier": "0", "nameIdentifierScheme": "WEKO"}]}]}, "item_1_date_granted_11": {"attribute_name": "学位授与年月日", "attribute_value_mlt": [{"subitem_dategranted": "2008-09-30"}]}, "item_1_degree_grantor_5": {"attribute_name": "学位授与機関", "attribute_value_mlt": [{"subitem_degreegrantor": [{"subitem_degreegrantor_name": "総合研究大学院大学"}]}]}, "item_1_degree_name_6": {"attribute_name": "学位名", "attribute_value_mlt": [{"subitem_degreename": "博士（情報学）"}]}, "item_1_description_1": {"attribute_name": "ID", "attribute_value_mlt": [{"subitem_description": "2008520", "subitem_description_type": "Other"}]}, "item_1_description_12": {"attribute_name": "要旨", "attribute_value_mlt": [{"subitem_description": "　There are numerous proposals for the physical realization of a quantum\u003cbr /\u003ecomputer. However, distributed approaches, making use both of flying and\u003cbr /\u003estationary qubits, seem to constitute the most promising route towards a\u003cbr /\u003etruly scalable device. Such systems guarantee extendibility, they incorpo-\u003cbr /\u003erate the interface with communication applications and relax the physical\u003cbr /\u003erealization of the device, allowing for defect tolerance. Flying qubits are\u003cbr /\u003eincluded in the more general concept of a quantum bus, a mediating sys-\u003cbr /\u003etem which can be of higher dimension. Such a quantum bus can be used\u003cbr /\u003ein the straightforward preparation of a standard multi-qubit resource en-\u003cbr /\u003eabling measurement based quantum computation, the cluster state. This\u003cbr /\u003econstitutes the framework for the results presented in this thesis.\u003cbr /\u003e　We begin by investigating the effects of dissipation in the continuous\u003cbr /\u003evariable bus scheme known as the qubus scheme. By considering loss in the\u003cbr /\u003ebus as it mediates interactions between the stationary qubits, we obtain an-\u003cbr/\u003ealytical results for the effective action of the induced quantum gate. We find\u003cbr /\u003ethat a particular two-qubit gate operates with high fidelity in the presence\u003cbr /\u003eof moderate loss and give a simple iteration scheme to simplify the effects\u003cbr /\u003eof loss on the qubits. We then attempt to reduce these effects by preparing\u003cbr /\u003ethe bus in more elaborate state, however no improvements are observed.\u003cbr /\u003e　We then apply the qubus scheme to the probabilistic generation of cluster\u003cbr /\u003estates and develop an entangling gate working with high success probability.\u003cbr /\u003eThis allows us to produce cluster states far more efficiently than other pro-\u003cbr /\u003eposals.　Investigating new methods to analyze the performance of different\u003cbr /\u003egeneration strategies constitutes the second part of this set of results. We\u003cbr /\u003ebegin by making the large flow approximation, used in queuing theory, to\u003cbr /\u003eobtain the optimal strategy in a regime with large resources. After what\u003cbr /\u003ewe take the other more familiar limit of single cluster growth and introduce\u003cbr /\u003eabsorbing Markov chains as a key mathematical tool.\u003cbr /\u003e　Finally we look at the transmission of composite quantum systems via a\u003cbr /\u003esingle higher dimensional bus. We provide generalized protocols and inter-\u003cbr /\u003eactions guaranteeing a full transfer of the information from one composite\u003cbr /\u003esystem to another. These protocols can also serve information process-\u003cbr /\u003eing tasks, as useful logical operations can be applied to the data as it is\u003cbr /\u003etransfered. We notice lastly that the qubus scheme constitutes a potential\u003cbr /\u003ephysical realization.", "subitem_description_type": "Other"}]}, "item_1_description_18": {"attribute_name": "フォーマット", "attribute_value_mlt": [{"subitem_description": "application/pdf", "subitem_description_type": "Other"}]}, "item_1_description_7": {"attribute_name": "学位記番号", "attribute_value_mlt": [{"subitem_description": "総研大甲第1201号", "subitem_description_type": "Other"}]}, "item_1_select_14": {"attribute_name": "所蔵", "attribute_value_mlt": [{"subitem_select_item": "無"}]}, "item_1_select_8": {"attribute_name": "研究科", "attribute_value_mlt": [{"subitem_select_item": "複合科学研究科"}]}, "item_1_select_9": {"attribute_name": "専攻", "attribute_value_mlt": [{"subitem_select_item": "17 情報学専攻"}]}, "item_1_text_10": {"attribute_name": "学位授与年度", "attribute_value_mlt": [{"subitem_text_value": "2008"}]}, "item_creator": {"attribute_name": "著者", "attribute_type": "creator", "attribute_value_mlt": [{"creatorNames": [{"creatorName": "LOUIS, Sebastien Gerald Roland ", "creatorNameLang": "en"}], "nameIdentifiers": [{"nameIdentifier": "0", "nameIdentifierScheme": "WEKO"}]}]}, "item_files": {"attribute_name": "ファイル情報", "attribute_type": "file", "attribute_value_mlt": [{"accessrole": "open_date", "date": [{"dateType": "Available", "dateValue": "2016-02-17"}], "displaytype": "simple", "download_preview_message": "", "file_order": 0, "filename": "甲1201_要旨.pdf", "filesize": [{"value": "293.5 kB"}], "format": "application/pdf", "future_date_message": "", "is_thumbnail": false, "licensetype": "license_11", "mimetype": "application/pdf", "size": 293500.0, "url": {"label": "要旨・審査要旨", "url": "https://ir.soken.ac.jp/record/876/files/甲1201_要旨.pdf"}, "version_id": "66c3da6a-734b-4b03-ad81-df9fa5fa0dda"}, {"accessrole": "open_date", "date": [{"dateType": "Available", "dateValue": "2016-02-17"}], "displaytype": "simple", "download_preview_message": "", "file_order": 1, "filename": "甲1201_本文.pdf", "filesize": [{"value": "2.2 MB"}], "format": "application/pdf", "future_date_message": "", "is_thumbnail": false, "licensetype": "license_11", "mimetype": "application/pdf", "size": 2200000.0, "url": {"label": "本文", "url": "https://ir.soken.ac.jp/record/876/files/甲1201_本文.pdf"}, "version_id": "c05ca974-5335-492e-8b5b-2d57345d60ed"}]}, "item_language": {"attribute_name": "言語", "attribute_value_mlt": [{"subitem_language": "eng"}]}, "item_resource_type": {"attribute_name": "資源タイプ", "attribute_value_mlt": [{"resourcetype": "thesis", "resourceuri": "http://purl.org/coar/resource_type/c_46ec"}]}, "item_title": "Distributed Hybrid Quantum Computing", "item_titles": {"attribute_name": "タイトル", "attribute_value_mlt": [{"subitem_title": "Distributed Hybrid Quantum Computing"}, {"subitem_title": "Distributed Hybrid Quantum Computing", "subitem_title_language": "en"}]}, "item_type_id": "1", "owner": "1", "path": ["19"], "permalink_uri": "https://ir.soken.ac.jp/records/876", "pubdate": {"attribute_name": "公開日", "attribute_value": "2010-02-22"}, "publish_date": "2010-02-22", "publish_status": "0", "recid": "876", "relation": {}, "relation_version_is_last": true, "title": ["Distributed Hybrid Quantum Computing"], "weko_shared_id": -1}