Proposal for automated transformations on single-photon multipath qudits

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dc.creatorRoberto Dobal Baldijão
dc.creatorGilberto Ferreira Borges Junior
dc.creatorBreno Marques Gonçalves Teixeira
dc.creatorMiguel Ángel Solís Prosser
dc.creatorLeonardo Teixeira Neves
dc.creatorSebastião José Nascimento de Pádua
dc.date.accessioned2025-02-24T18:17:45Z
dc.date.accessioned2025-09-08T23:06:02Z
dc.date.available2025-02-24T18:17:45Z
dc.date.issued2017
dc.description.sponsorshipCNPq - Conselho Nacional de Desenvolvimento Científico e Tecnológico
dc.description.sponsorshipFAPEMIG - Fundação de Amparo à Pesquisa do Estado de Minas Gerais
dc.description.sponsorshipCAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
dc.identifier.doihttps://doi.org/10.1103/PhysRevA.96.032329
dc.identifier.issn2469-9934
dc.identifier.urihttps://hdl.handle.net/1843/80360
dc.languageeng
dc.publisherUniversidade Federal de Minas Gerais
dc.relation.ispartofPhysical Review A
dc.rightsAcesso Restrito
dc.subjectÓptica quântica
dc.subjectInformação quântica
dc.subject.otherOptical quantum information processing
dc.subject.otherQuantum information processing
dc.subject.otherQuantum measurements
dc.subject.otherQuantum optics
dc.titleProposal for automated transformations on single-photon multipath qudits
dc.typeArtigo de periódico
local.citation.issue3
local.citation.volume96
local.description.resumoWe propose a method for implementing automated state transformations on single-photon multipath qudits encoded in a one-dimensional transverse spatial domain. It relies on transferring the encoding from this domain to the orthogonal one by applying a spatial phase modulation with diffraction gratings, merging all the initial propagation paths by using a stable interferometric network, and filtering out the unwanted diffraction orders. The automation feature is attained by utilizing a programmable phase-only spatial light modulator (SLM) where properly designed diffraction gratings displayed on its screen will implement the desired transformations, including, among others, projections, permutations, and random operations. We discuss the losses in the process which is, in general, inherently nonunitary. Some examples of transformations are presented and, considering a realistic scenario, we analyze how they will be affected by the pixelated structure of the SLM screen. The method proposed here enables one to implement much more general transformations on multipath qudits than is possible with a SLM alone operating in the diagonal basis of which-path states. Therefore, it will extend the range of applicability for this encoding in high-dimensional quantum information and computing protocols as well as fundamental studies in quantum theory.
local.identifier.orcidhttps://orcid.org/0000-0002-4248-2015
local.identifier.orcidhttp://orcid.org/0000-0002-2560-7162
local.identifier.orcidhttps://orcid.org/0000-0002-2856-441X
local.identifier.orcidhttps://orcid.org/0000-0002-9589-1939
local.identifier.orcidhttps://orcid.org/0000-0001-9429-1205
local.publisher.countryBrasil
local.publisher.departmentICX - DEPARTAMENTO DE FÍSICA
local.publisher.initialsUFMG
local.url.externahttps://journals.aps.org/pra/abstract/10.1103/PhysRevA.96.032329

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