17 research outputs found

    Spin-photon interface and spin-controlled photon switching in a nanobeam waveguide

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    Access to the electron spin is at the heart of many protocols for integrated and distributed quantum-information processing [1-4]. For instance, interfacing the spin-state of an electron and a photon can be utilized to perform quantum gates between photons [2,5] or to entangle remote spin states [6-9]. Ultimately, a quantum network of entangled spins constitutes a new paradigm in quantum optics [1]. Towards this goal, an integrated spin-photon interface would be a major leap forward. Here we demonstrate an efficient and optically programmable interface between the spin of an electron in a quantum dot and photons in a nanophotonic waveguide. The spin can be deterministically prepared with a fidelity of 96\%. Subsequently the system is used to implement a "single-spin photonic switch", where the spin state of the electron directs the flow of photons through the waveguide. The spin-photon interface may enable on-chip photon-photon gates [2], single-photon transistors [10], and efficient photonic cluster state generation [11]

    The contribution from psychological, social, and organizational work factors to risk of disability retirement: a systematic review with meta-analyses

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    Evaluation of well-being at work among nursing professionals at a University Hospital Evaluación del bienestar en el trabajo entre los profesionales de enfermería de un hospital universitario Avaliação do bem-estar no trabalho entre profissionais de enfermagem de um hospital universitário

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    Well-being at work is based on Positive Psychology, and is defined as a psychological state with positive affective links towards work and also towards the organisation. The purpose of this study was to look at the degree of well-being at work among nursing professionals who work at a University hospital and also identify differences between occupational categories and types of work contracts. The sample was made up of 340 professionals who answered valid scales of the following constructs: Work Satisfaction, Involvement with Work and Affective Organisational Commitment. For the analysis of the data we used SPSS, version 12, for descriptive statistics, and also for testing differences between means. The results showed an average level of well-being in the workplace and also differences between professional categories and work regime, when it comes to satisfaction with salaries and promotions, which can have a reflection in the quality of service provided to the patients of this University hospital.<br>Bienestar en el trabajo se apoya en la Psicología Positiva, siendo definido como un estado psicológico compuesto por vínculos afectivos positivos con el trabajo y con la organización. Este estudio tuvo por objetivo conocer el nivel de bienestar en el trabajo de profesionales de enfermería que actúan en un hospital universitario e identificar diferencias entre categorías ocupacionales y tipos de contrato de trabajo. La muestra fue compuesta por 340 profesionales que contestaron escalas válidas de los constructos: Satisfacción en el Trabajo, Envolvimiento con el Trabajo y Comprometimiento Organizacional Afectivo. Para análisis de los datos se utilizó el programa SPSS, versión 12, para efectuar estadísticas descriptivas y testes de diferencia entre medias. Los resultados indicaron nivel medio de bienestar en el trabajo y diferencias entre las categorías profesionales y régimen de contratación en cuanto a la satisfacción con salario y promociones, lo que puede reflejar en la calidad del servicio prestado a los pacientes del hospital universitario.<br>Bem-estar no trabalho apoia-se na Psicologia Positiva, sendo definido como um estado psicológico composto por vínculos afetivos positivos com o trabalho e com a organização. Este estudo teve por objetivo conhecer o nível de bem-estar no trabalho de profissionais de Enfermagem que atuam em um hospital universitário e identificar diferenças entre categorias ocupacionais e tipos de contrato de trabalho. A amostra foi composta por 340 profissionais que responderam a escalas válidas dos construtos: Satisfação no Trabalho, Envolvimento com o Trabalho e Comprometimento Organizacional Afetivo. Para análise dos dados utilizou-se o programa SPSS, versão 12, a fim de efetuar estatísticas descritivas e testes de diferença entre médias. Os resultados indicaram nível médio de bem-estar no trabalho e diferenças entre as categorias profissionais e regime de contratação quanto à satisfação com salário e promoções, o que pode refletir na qualidade do atendimento prestado aos pacientes do hospital universitário
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