{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/35236"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/35236","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Quantum information applications of frequency upconversion","abstract":"We demonstrate the utility of frequency upconversion in a non-linear crystal for quantum information applications. By combining a bright “escort” beam with a signal photon inside of a periodically poled lithium niobate (PPLN) crystal, we are able to achieve near unit conversion efficiency. We use this conversion process to create high-efficiency infrared single-photon detectors by upconverting infrared photons to visible ones and using efficient silicon avalanche photo diodes to detect the upconverted photon. We have achieved a net system detection efficiency of 56%, far superior to previous methods for infrared photon detection. We also demonstrate the phase coherence of the upconversion process, which enables it to convert photonic qubits from one wavelength to another, potentially allowing quantum networks of disparate operating wavelengths to communicate efficiently. This quantum “transduction” feature is observed by upconverting photons passed between two unbalanced Michelson interferometers that create and measure time-bin qubits, similar to those used in many quantum cryptography systems, and verifying that the phase of the qubits is preserved. The Rabi oscillation-like behavior of upconversion is also demonstrated, allowing for the creation and manipulation of highly non-degenerate frequency qubits. These states may be used in conjunction with other degrees of freedom such as polarization, time-bin, or orbital angular momentum states to enlarge the usable single-photon Hilbert space and create a rich vocabulary for transmission of quantum information.","abstract_html":"We demonstrate the utility of frequency upconversion in a non-linear crystal for quantum information applications. By combining a bright “escort” beam with a signal photon inside of a periodically poled lithium niobate (PPLN) crystal, we are able to achieve near unit conversion efficiency. We use this conversion process to create high-efficiency infrared single-photon detectors by upconverting infrared photons to visible ones and using efficient silicon avalanche photo diodes to detect the upconverted photon. We have achieved a net system detection efficiency of 56%, far superior to previous methods for infrared photon detection. We also demonstrate the phase coherence of the upconversion process, which enables it to convert photonic qubits from one wavelength to another, potentially allowing quantum networks of disparate operating wavelengths to communicate efficiently. This quantum “transduction” feature is observed by upconverting photons passed between two unbalanced Michelson interferometers that create and measure time-bin qubits, similar to those used in many quantum cryptography systems, and verifying that the phase of the qubits is preserved. The Rabi oscillation-like behavior of upconversion is also demonstrated, allowing for the creation and manipulation of highly non-degenerate frequency qubits. These states may be used in conjunction with other degrees of freedom such as polarization, time-bin, or orbital angular momentum states to enlarge the usable single-photon Hilbert space and create a rich vocabulary for transmission of quantum information.","abstract_has_math":false,"creators":["VanDevender, Aaron Pace"],"institution":null,"degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Physics","degree_department":null,"school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2012,"date_issued":"2012-11-19T16:52:24Z","date_published":"2012-11-19T16:52:24Z","updated_at":"2026-07-22T22:25:31Z","subjects":["quantum information","rabi oscillation","Oscillation","polarization","escort beam","photonic","wavelength","time-bin","orbital angular momentum","single-photon","photon","hilbert space","infrared photon","ppln","phasematching","coherence","atom simulator","polarization switch","sagnac switchl mach-zehnder switch- phase modulation"],"languages":["en"],"rights":["2007 VanDevender ©"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/2142/35236","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:creator","label":"Author","values":["VanDevender, Aaron Pace"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2012-11-19T16:52:24Z","10000-01-01","2007"]},{"key":"dc:type","label":"Dc Type","values":["Dissertation / Thesis","text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Physics"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Dissertation"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Ph.D."]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["quantum information","rabi oscillation","Oscillation","polarization","escort beam","photonic","wavelength","time-bin","orbital angular momentum","single-photon","photon","hilbert space","infrared photon","ppln","phasematching","coherence","atom simulator","polarization switch","sagnac switchl mach-zehnder switch- phase modulation"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["2007 VanDevender ©"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/35236"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["We demonstrate the utility of frequency upconversion in a non-linear crystal for quantum information applications. By combining a bright “escort” beam with a signal photon inside of a periodically poled lithium niobate (PPLN) crystal, we are able to achieve near unit conversion efficiency. We use this conversion process to create high-efficiency infrared single-photon detectors by upconverting infrared photons to visible ones and using efficient silicon avalanche photo diodes to detect the upconverted photon. We have achieved a net system detection efficiency of 56%, far superior to previous methods for infrared photon detection. We also demonstrate the phase coherence of the upconversion process, which enables it to convert photonic qubits from one wavelength to another, potentially allowing quantum networks of disparate operating wavelengths to communicate efficiently. This quantum “transduction” feature is observed by upconverting photons passed between two unbalanced Michelson interferometers that create and measure time-bin qubits, similar to those used in many quantum cryptography systems, and verifying that the phase of the qubits is preserved. The Rabi oscillation-like behavior of upconversion is also demonstrated, allowing for the creation and manipulation of highly non-degenerate frequency qubits. These states may be used in conjunction with other degrees of freedom such as polarization, time-bin, or orbital angular momentum states to enlarge the usable single-photon Hilbert space and create a rich vocabulary for transmission of quantum information.","Submitted by Elias Lopez (erlopez2@illinois.edu) on 2012-11-19T16:52:24Z No. of bitstreams: 1 VanDevender_Aaron.pdf: 1418435 bytes, checksum: 5fac7f62cdcbab0337722a3b8a6473b4 (MD5)","Made available in DSpace on 2012-11-19T16:52:24Z (GMT). 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By combining a bright “escort” beam with a signal photon inside of a periodically poled lithium niobate (PPLN) crystal, we are able to achieve near unit conversion efficiency. We use this conversion process to create high-efficiency infrared single-photon detectors by upconverting infrared photons to visible ones and using efficient silicon avalanche photo diodes to detect the upconverted photon. We have achieved a net system detection efficiency of 56%, far superior to previous methods for infrared photon detection. We also demonstrate the phase coherence of the upconversion process, which enables it to convert photonic qubits from one wavelength to another, potentially allowing quantum networks of disparate operating wavelengths to communicate efficiently. This quantum “transduction” feature is observed by upconverting photons passed between two unbalanced Michelson interferometers that create and measure time-bin qubits, similar to those used in many quantum cryptography systems, and verifying that the phase of the qubits is preserved. The Rabi oscillation-like behavior of upconversion is also demonstrated, allowing for the creation and manipulation of highly non-degenerate frequency qubits. These states may be used in conjunction with other degrees of freedom such as polarization, time-bin, or orbital angular momentum states to enlarge the usable single-photon Hilbert space and create a rich vocabulary for transmission of quantum information.","Submitted by Elias Lopez (erlopez2@illinois.edu) on 2012-11-19T16:52:24Z No. of bitstreams: 1 VanDevender_Aaron.pdf: 1418435 bytes, checksum: 5fac7f62cdcbab0337722a3b8a6473b4 (MD5)","Made available in DSpace on 2012-11-19T16:52:24Z (GMT). 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