Quantum circuits with many photons on a programmable nanophotonic chip.

Growing interest in quantum computing for practical applications has led to a surge in the availability of programmable machines for executing quantum algorithms1,2. Present-day photonic quantum computers3-7 have been limited either to non-deterministic operation, low photon numbers and rates, or fixed random gate sequences. Here we introduce a full-stack hardware-software system for executing many-photon quantum circuit operations using integrated nanophotonics: a programmable chip, operating at room temperature and interfaced with a fully automated control system. The system enables remote users to execute quantum algorithms that require up to eight modes of strongly squeezed vacuum initialized as two-mode squeezed states in single temporal modes, a fully general and programmable four-mode interferometer, and photon number-resolving readout on all outputs. Detection of multi-photon events with photon numbers and rates exceeding any previous programmable quantum optical demonstration is made possible by strong squeezing and high sampling rates. We verify the non-classicality of the device output, and use the platform to carry out proof-of-principle demonstrations of three quantum algorithms: Gaussian boson sampling, molecular vibronic spectra and graph similarity8. These demonstrations validate the platform as a launchpad for scaling photonic technologies for quantum information processing.

Broadband quadrature-squeezed vacuum and nonclassical photon number correlations from a nanophotonic device.

We report demonstrations of both quadrature-squeezed vacuum and photon number difference squeezing generated in an integrated nanophotonic device. Squeezed light is generated via strongly driven spontaneous four-wave mixing below threshold in silicon nitride microring resonators. The generated light is characterized with both homodyne detection and direct measurements of photon statistics using photon number-resolving transition-edge sensors. We measure 1.0(1) decibels of broadband quadrature squeezing (~4 decibels inferred on-chip) and 1.5(3) decibels of photon number difference squeezing (~7 decibels inferred on-chip). Nearly single temporal mode operation is achieved, with measured raw unheralded second-order correlations g (2) as high as 1.95(1). Multiphoton events of over 10 photons are directly detected with rates exceeding any previous quantum optical demonstration using integrated nanophotonics. These results will have an enabling impact on scaling continuous variable quantum technology.

Granulomatosis linfomatoide: una entidad poco conocida / No disponible

Propósito: describir un caso clínico de granulomatosislinfomatoide, y realizar una revisión de labibliografía existente para conocer mejor dicha enfermedad.Material y métodos: varón de 27 años conantecedentes de linfoma no Hodgkin B a los 17años que debuta con insuficiencia respiratoria trasdiez años en revisiones periódicas.Conclusiones: la granulomatosis linfomatoideconstituye una entidad rara, de mal pronóstico y enla que no se ha definido el mejor tratamiento posible,existiendo diversas posibilidades y siendo necesarioun mayor estudio de dicha entidad con el finde mejorar su pronóstico

Purpose: To describe a clinical case of lymphomatoidgranulomatosis and to make a review ofthe existing bibliography for the better knowing ofthe disease.Material and methods: A 27 year old manwith a history of B-cell lymphoma at he age of 17years that started with respiratory insufficiency afterten years of periodic checkups.Conclusion: Lymphomatoid granulomatosis isa rare entity, with a poor prognosis and a lack of anestablished treatment. Although different treatmentshave been applied, further studies are necessary in order to improve its prognosis (AU)

Pioderma gangrenoso como síndrome paraneoplásico de un adenocarcinoma de recto / Gangrenous pyoderma as paraneoplastic syndrome of an adenocarnocima of the rectum

Propósito: Los síndromes paraneoplásicos sonentidades sintomáticas provocadas por el cáncer endiversos lugares del organismo. Su incidencia estáinfraestimada y no siempre son bien conocidos. Pretendemospresentar un ejemplo de los hechos quedebe cumplir una entidad nosológica para ser consideradacomo síndrome paraneoplásico: relacióntemporal y curso evolutivo paralelo.Material y métodos: Mujer de 72 años quedebuta con una lesión cutánea finalmente diagnosticadacomo pioderma gangrenoso precediendo a unaneoplasia digestiva.Conclusiones: El tumor digestivo más frecuentementeasociado al pioderma gangrenoso es elcolorectal. Se puede afirmar que está bien establecidala existencia de esta enfermedad cutánea comosíndrome paraneoplásico

Purpose: Paraneoplastic syndromes are clinicalsyndromes caused by tumors occurring in placesdistant from the tumor itself. Its incidence isunderestimated. We present a case of paraneoplasticsyndrome as an example, indicating thecharacteristics these syndromes must follow to beconsidered as suchMaterial and methods: A 72 year oldwoman with a skin disorder diagnosed as pyodermagangraenosum before the diagnosis of a colo-rectalcancer were made.Conclusion: Colo-rectal tumors are thedigestive neoplasms more frequently associated topyoderma. The relation between pyoderma as aparaneoplastic syndrome of colo-rectal cancer iswell established