Quantum memory based on electromagnetically induced transparency in optical cavities

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dc.contributor.advisor1Villas-Bôas, Celso Jorge
dc.contributor.advisor1Latteshttp://lattes.cnpq.br/5700887540085418por
dc.contributor.authorOliveira, Rommel Rodrigues de
dc.contributor.authorlatteshttp://lattes.cnpq.br/1239076898021486por
dc.date.accessioned2016-06-02T20:16:54Z
dc.date.available2015-04-28
dc.date.available2016-06-02T20:16:54Z
dc.date.issued2015-04-16
dc.description.resumoRecently a quantum memory for a coherent pulse was accomplished using an atom trapped inside a high finesse cavity, where an eficiency of 9:3% was achieved for a storage time of 2_s and an average fidelity of 93% for a storage time of 180fis. We theoretically studied this system using the master equation approach, exhausting all the possible ways one could improve the eficiency, defined here as the ratio between the mean number of photons retrieved after the memory process and the mean number of photons that enters the empty cavity, fi = hayaiout=hayaiin, which proved to have an upper bound of 25%. Since protocols relying on phase-matching conditions for single photon input states were already developed, using a model by H. Carmichael, a comparison between storage of coherent and single photon states was made, which did not gave rise any observable difference. Finally a more detailed study about the differences between an input-output and a master equation approach was done. It was concluded that the experimental setup suitable for observing cavity electromagnetically induced transparency (EIT) is not the ideal one for a quantum memory experiment. No modifications to the master equation theory were necessary, and a simple relation between the cavity and output fields was derived.eng
dc.description.sponsorshipUniversidade Federal de Sao Carlos
dc.formatapplication/pdfpor
dc.identifier.citationOLIVEIRA, Rommel Rodrigues de. Quantum memory based on electromagnetically induced transparency in optical cavities. 2015. 54 f. Dissertação (Mestrado em Ciências Exatas e da Terra) - Universidade Federal de São Carlos, São Carlos, 2015.por
dc.identifier.urihttps://repositorio.ufscar.br/handle/20.500.14289/5074
dc.languageengeng
dc.publisherUniversidade Federal de São Carlospor
dc.publisher.countryBRpor
dc.publisher.initialsUFSCarpor
dc.publisher.programPrograma de Pós-Graduação em Física - PPGFpor
dc.rightsAcesso Abertopor
dc.subjectPhysicseng
dc.subjectÓptica quânticapor
dc.subjectInformação quânticapor
dc.subjectComputação quânticapor
dc.subject.cnpqCIENCIAS EXATAS E DA TERRA::FISICApor
dc.titleQuantum memory based on electromagnetically induced transparency in optical cavitieseng
dc.typeDissertaçãopor

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