{"created":"2023-06-20T13:20:49.438210+00:00","id":876,"links":{},"metadata":{"_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":["2:429:19"]},"author_link":["0","0","0"],"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_12":{"attribute_name":"要旨","attribute_value_mlt":[{"subitem_description":" There are numerous proposals for the physical realization of a quantum<br />computer. However, distributed approaches, making use both of flying and<br />stationary qubits, seem to constitute the most promising route towards a<br />truly scalable device. Such systems guarantee extendibility, they incorpo-<br />rate the interface with communication applications and relax the physical<br />realization of the device, allowing for defect tolerance. Flying qubits are<br />included in the more general concept of a quantum bus, a mediating sys-<br />tem which can be of higher dimension. Such a quantum bus can be used<br />in the straightforward preparation of a standard multi-qubit resource en-<br />abling measurement based quantum computation, the cluster state. This<br />constitutes the framework for the results presented in this thesis.<br /> We begin by investigating the effects of dissipation in the continuous<br />variable bus scheme known as the qubus scheme. By considering loss in the<br />bus as it mediates interactions between the stationary qubits, we obtain an-<br/>alytical results for the effective action of the induced quantum gate. We find<br />that a particular two-qubit gate operates with high fidelity in the presence<br />of moderate loss and give a simple iteration scheme to simplify the effects<br />of loss on the qubits. We then attempt to reduce these effects by preparing<br />the bus in more elaborate state, however no improvements are observed.<br /> We then apply the qubus scheme to the probabilistic generation of cluster<br />states and develop an entangling gate working with high success probability.<br />This allows us to produce cluster states far more efficiently than other pro-<br />posals. Investigating new methods to analyze the performance of different<br />generation strategies constitutes the second part of this set of results. We<br />begin by making the large flow approximation, used in queuing theory, to<br />obtain the optimal strategy in a regime with large resources. After what<br />we take the other more familiar limit of single cluster growth and introduce<br />absorbing Markov chains as a key mathematical tool.<br /> Finally we look at the transmission of composite quantum systems via a<br />single higher dimensional bus. We provide generalized protocols and inter-<br />actions guaranteeing a full transfer of the information from one composite<br />system to another. These protocols can also serve information process-<br />ing tasks, as useful logical operations can be applied to the data as it is<br />transfered. We notice lastly that the qubus scheme constitutes a potential<br />physical 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","filename":"甲1201_要旨.pdf","filesize":[{"value":"293.5 kB"}],"format":"application/pdf","licensetype":"license_11","mimetype":"application/pdf","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","filename":"甲1201_本文.pdf","filesize":[{"value":"2.2 MB"}],"format":"application/pdf","licensetype":"license_11","mimetype":"application/pdf","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"],"pubdate":{"attribute_name":"公開日","attribute_value":"2010-02-22"},"publish_date":"2010-02-22","publish_status":"0","recid":"876","relation_version_is_last":true,"title":["Distributed Hybrid Quantum Computing"],"weko_creator_id":"1","weko_shared_id":-1},"updated":"2023-06-20T16:11:01.883442+00:00"}