The quest for three-color entanglement: experimental investigation of new multipartite quantum correlations

We experimentally investigate quadrature correlations between pump, signal, and idler fields in an above-threshold optical parametric oscillator. We observe new quantum correlations among the pump and signal or idler beams, as well as among the pump and a combined quadrature of signal and idler beams. A further investigation of unforeseen classical noise observed in this system is presented, which hinders the observation of the recently predicted tripartite entanglement. In spite of this noise, current results approach the limit required to demonstrate three-color entanglement.Comment: 10 pages, 5 figures, submitted to Opt. Expres

Canonical and Functional Schrodinger Quantization of Two--Dimensional Dilaton Gravity

We discuss the relation between canonical and Schrodinger quantization of the CGHS model. We also discuss the situation when background charges are added to cancel the Virasoro anomaly. New physical states are found when the square of the background charges vanishes.Comment: 12 pages, revtex Minor correction

Qualidade de vida relacionada à saúde de mulheres com câncer de colo uterino

This cross-sectional study aimed to evaluate the health related quality of life (HRQoL) of women with cervical cancer and to identify predictors of quality of life. Between November 2008 and February 2009, 149 women were interviewed. The instrument Functional Assessment of Cancer Therapy-Cervix Cancer (FACT-Cx) was used to assess HRQoL and, in general, the scores obtained indicated positive evaluation. The items that showed negative evaluation were: I am interested in sex, I feel sexually attractive, I am afraid to have sex and My vagina feels too narrow or short. In multiple linear regression analysis, using the backward method, of the 18 independent variables, eight were predictive of HRQoL. Self-perceived health status was the most influential factor. Special attention should be given to the sexual dysfunctions of these women after radiotherapy.Este estudio, de corte transversal, tuvo como objetivos evaluar la calidad de vida relacionada a la salud (CVRS) de mujeres con cáncer de cuello uterino e identificar los factores de predicción de calidad de vida. Fueron entrevistadas 149 mujeres, en el período de noviembre de 2008 a febrero de 2009. El instrumento Functional Asesment of Cancer Therapy-Cervix Cancer (FACT-Cx) fue utilizado para evaluar la CVRS y, de forma general, los puntajes obtenidos indicaron evaluación positiva. Presentaron evaluación negativa los ítems: tengo interés en sexo, me siento sexualmente atrayente, tengo miedo de tener relaciones sexuales y siento la vagina estrecha o demasiada corta. En el análisis de regresión linear múltiple, por el método backward, de las 18 variables independientes, ocho fueron factores de predicción de CVRS. La autopercepción del estado de salud fue el factor de mayor influencia. Atención especial debe ser dada a las disfunciones sexuales de esas mujeres después de la radioterapia.Este estudo, de corte transversal, teve como objetivos avaliar a qualidade de vida relacionada à saúde (QVRS) de mulheres com câncer de colo uterino e identificar os fatores preditores de qualidade de vida. Foram entrevistadas 149 mulheres, no período de novembro de 2008 a fevereiro de 2009. O instrumento Functional Assessment of Cancer Therapy-Cervix Cancer (FACT-Cx) foi utilizado para avaliar a QVRS e, de forma geral, os escores obtidos indicaram avaliação positiva. Apresentaram avaliação negativa os itens: tenho interesse em sexo, sinto-me sexualmente atraente, tenho medo de ter relações sexuais e sinto a vagina estreita ou curta demais. Na análise de regressão linear múltipla, pelo método backward, das 18 variáveis independentes, oito foram preditoras de QVRS. A autopercepção do estado de saúde foi o fator de maior influência. Atenção especial deve ser dada às disfunções sexuais dessas mulheres após a radioterapia

Calidad de vida relacionada a la salud de mujeres con cáncer de cuello uterino

This cross-sectional study aimed to evaluate the health related quality of life (HRQoL) of women with cervical cancer and to identify predictors of quality of life. Between November 2008 and February 2009, 149 women were interviewed. The instrument Functional Assessment of Cancer Therapy-Cervix Cancer (FACT-Cx) was used to assess HRQoL and, in general, the scores obtained indicated positive evaluation. The items that showed negative evaluation were: “I am interested in sex”, “I feel sexually attractive”, “I am afraid to have sex” and “My vagina feels too narrow or short”. In multiple linear regression analysis, using the backward method, of the 18 independent variables, eight were predictive of HRQoL. Self-perceived health status was the most influential factor. Special attention should be given to the sexual dysfunctions of these women after radiotherapy.Este estudo, de corte transversal, teve como objetivos avaliar a qualidade de vida relacionada à saúde (QVRS) de mulheres com câncer de colo uterino e identificar os fatores preditores de qualidade de vida. Foram entrevistadas 149 mulheres, no período de novembro de 2008 a fevereiro de 2009. O instrumento Functional Assessment of Cancer Therapy-Cervix Cancer (FACT-Cx) foi utilizado para avaliar a QVRS e, de forma geral, os escores obtidos indicaram avaliação positiva. Apresentaram avaliação negativa os itens: “tenho interesse em sexo”, “sinto-me sexualmente atraente”, “tenho medo de ter relações sexuais” e “sinto a vagina estreita ou curta demais”. Na análise de regressão linear múltipla, pelo método backward, das 18 variáveis independentes, oito foram preditoras de QVRS. A autopercepção do estado de saúde foi o fator de maior influência. Atenção especial deve ser dada às disfunções sexuais dessas mulheres após a radioterapia.Este estudio, de corte transversal, tuvo como objetivos evaluar la calidad de vida relacionada a la salud (CVRS) de mujeres con cáncer de cuello uterino e identificar los factores de predicción de calidad de vida. Fueron entrevistadas 149 mujeres, en el período de noviembre de 2008 a febrero de 2009. El instrumento Functional Asesment of Cancer Therapy-Cervix Cancer (FACT-Cx) fue utilizado para evaluar la CVRS y, de forma general, los puntajes obtenidos indicaron evaluación positiva. Presentaron evaluación negativa los ítems: “tengo interés en sexo”, “me siento sexualmente atrayente”, “tengo miedo de tener relaciones sexuales” y “siento la vagina estrecha o demasiada corta”. En el análisis de regresión linear múltiple, por el método backward, de las 18 variables independientes, ocho fueron factores de predicción de CVRS. La autopercepción del estado de salud fue el factor de mayor influencia. Atención especial debe ser dada a las disfunciones sexuales de esas mujeres después de la radioterapia

Scalable continuous-variable entanglement of light beams produced by optical parametric oscillators

We show that scalable multipartite entanglement among light fields may be generated by optical parametric oscillators (OPO). The tripartite entanglement existent among the three bright beams produced by a single OPO -- pump, signal, and idler -- is scalable to a system of many OPOs by pumping them in cascade with the same optical field. This latter serves as an entanglement distributor. The special case of two OPOs is studied, as it is shown that the resulting five bright beams share genuine multipartite entanglement. In addition, the structure of entanglement distribution among the fields can be manipulated to some degree by tuning the incident pump power. The scalability to many fields is straightforward, allowing an alternative implementation of a multipartite quantum information network with continuous variables

Gauge Theoretic Formulation of Dilatonic Gravity Coupled to Particles

We discuss the formulation of the CGHS model in terms of a topological BF theory coupled to particles carrying non-Abelian charge.Comment: 4 pages. Talk given at QG99 Meeting, Sardinia, September 1999. Uses espcrc2.sty (twocolumn

Generation of Bright Two-Color Continuous Variable Entanglement

We present the first measurement of squeezed-state entanglement between the twin beams produced in an Optical Parametric Oscillator (OPO) operating above threshold. Besides the usual squeezing in the intensity difference between the twin beams, we have measured squeezing in the sum of phase quadratures. Our scheme enables us to measure such phase anti-correlations between fields of different frequencies. In the present measurements, wavelengths differ by ~1 nm. Entanglement is demonstrated according to the Duan et al. criterion [Phys. Rev. Lett. 84, 2722 (2000)] $\Delta^2\hat{p}_- +\Delta^2\hat{q}_+=1.47(2)<2$. This experiment opens the way for new potential applications such as the transfer of quantum information between different parts of the electromagnetic spectrum.Comment: 4 pages, 3 figures, submitted to Phys. Rev. Let

Fungicide application technology for controlling the sugarcane orange rust

With the epidemic onset of the sugarcane orange rust, fungicide applications of the Strobilurins and Triazoles groups have become necessary in susceptible varieties. This study aimed at evaluating the operational conditions of fungicide application in sugarcane (SP81-3250 variety), in relation to the spray deposition on the upper canopy and the effectiveness of the orange rust control. Treatments consisted of two application volumes (30 L ha-1 or 40 L ha-1) and three nozzle deflection angles (0 º, 90 º or 135 º), plus a ground application at the rate of 200 L ha-1, sprayed with a uniform flat spray nozzle of air induction. The ground application resulted in the smallest and the greatest spray deposition on sugarcane leaves and on the soil, respectively. The aerial application at the rate of 30 L ha-1, sprayed by hollow cone nozzles, at a deflection angle of 135 º, provided the best sugarcane orange rust control. Tecnologia de aplicação de fungicidas no controle da ferrugem alaranjada da cana-de-açúcar -- Com o surgimento epidêmico da ferrugem alaranjada da cana-de-açúcar, aplicações de fungicidas dos grupos químicos Estrobilurinas e Triazóis tornaram-se necessárias para as variedades suscetíveis. Objetivou-se avaliar as condições operacionais de aplicação de fungicidas em cana-de-açúcar (variedade SP81-3250), no que se refere à deposição de calda no dossel superior e à efetividade do controle da ferrugem alaranjada. Os tratamentos consistiram de dois volumes de aplicação (30 L ha-1 ou 40 L ha-1) e três ângulos de deflexão das pontas (0 º, 90 º ou 135 º), além de uma aplicação terrestre à taxa de 200 L ha-1, pulverizada por meio de pontas de jato plano uniforme de indução de ar. A aplicação terrestre resultou na menor e maior deposição nas folhas de cana-de-açúcar e no solo, respectivamente. A aplicação aérea com taxa de 30 L ha-1, pulverizada por pontas de jato cônico vazio, com ângulo de deflexão de 135 º, proporcionou o melhor controle da ferrugem alaranjada da cana-de-açúcar