Fiscal shocks, public debt, and long-term interest rate dynamics

Public finances worldwide have been severely hit by the 2008-2009 Great Recession, stimulating the debate on the consequences of growing fiscal imbalances. Building on Paesani et al. (2006), this paper focuses on the USA, Germany and Italy over the 1983-2009 period and studies the effects of fiscal shocks and government debt accumulation on long-term interest rates, both nationally and across borders. Based on a a theoretical framework, the empirical analysis disentangles permanent and transitory components of interest rates dynamics .nding that sustained debt accumulation leads, at least temporarily, to higher long-term interest rates. The is particularly true for the Italian case. There is also evidence of signi.cant cross-country linkages, mainly between Italy and the USA.

Loss-tolerant architecture for quantum computing with quantum emitters

We develop an architecture for measurement-based quantum computing using photonic quantum emitters. The architecture exploits spin-photon entanglement as resource states and standard Bell measurements of photons for fusing them into a large spin-qubit cluster state. The scheme is tailored to emitters with limited memory capabilities since it only uses an initial non-adaptive (ballistic) fusion process to construct a fully percolated graph state of multiple emitters. By exploring various geometrical constructions for fusing entangled photons from deterministic emitters, we improve the photon loss tolerance significantly compared to similar all-photonic schemes

Threshold detection statistics of bosonic states

In quantum photonics, threshold detectors, distinguishing between vacuum and one or more photons, such as superconducting nanowires and avalanche photodiodes, are routinely used to measure Fock and Gaussian states of light. Despite being the standard measurement scheme, there is no general closed form expression for measurement probabilities with threshold detectors, unless accepting coarse approximations or combinatorially scaling summations. Here, we present new matrix functions to fill this gap. We develop the Bristolian and the loop Torontonian functions for threshold detection of Fock and displaced Gaussian states, respectively, and connect them to each other and to existing matrix functions. By providing a unified picture of bosonic statistics for most quantum states of light, we provide novel tools for the design and analysis of photonic quantum technologies.Comment: 14 pages, 2 figures, 1 tabl

Calidad del aire interior en el hábitat doméstico popular rural

La contaminación interior del hábitat domestico popular se produce, entre otros, por; 1) utilización de sistemas ineficientes de cocción y horneado de alimentos y calefacción; 2) uso inapropiado de combustibles; 3) empleo de materiales nocivos para la construcción; 4) ventilación inadecuada de los espacios; 5) uso y almacenamiento inadecuado de sustancias químicas; factores que inciden en el deterioro de la salud de sus moradores. Por lo tanto, este trabajo plantea como objetivos: 1) Diseñar, desarrollar y transferir estrategias y disposiciones arquitectónicas y tecnológicas para el mejoramiento de la calidad del aire interior en viviendas populares rurales; 2) alcanzar un desarrollo comunitario local sostenible. Se emplea como Metodología la Investigación Acción Participativa. Los resultados alcanzados son: a) estructuración y definición de los marcos: teórico y metodológico; b) definición del área geográfica; c) relevamientos y diagnósticos; d) concienciación, capacitación y formación; e) implementación de disposiciones arquitectónicas y tecnológicas; f) Inicio de mediciones de CO.Internal pollution of the Domestic Rural habit occurs by: 1) inefficient systems for cooking, backing and heating; 2) inappropriate fuels use; 3) employment of harmful materials for construction; 4) inadequate ventilation of the spaces; 5) inappropriate use and storage of chemical substances; these factors affect the deterioration of its habitant’s health. Therefore, this work rises as objectives: 1) design, develop and transfer of strategies and architectural and technological arrangements for improving the quality indoor air in rural popular houses; 2) sustainable community development. The participation - action research is used as methodology. The results achieved are to: a) structuring and definition of the theoretical and methodological frames; b) definition of the geographic area; c) diagnostics; d) awareness and training; e) implementation of architectural and technological dispositions; f) start measurements start.Asociación Argentina de Energías Renovables y Medio Ambiente (ASADES

Calidad del aire interior en el hábitat doméstico popular rural

La contaminación interior del hábitat domestico popular se produce, entre otros, por; 1) utilización de sistemas ineficientes de cocción y horneado de alimentos y calefacción; 2) uso inapropiado de combustibles; 3) empleo de materiales nocivos para la construcción; 4) ventilación inadecuada de los espacios; 5) uso y almacenamiento inadecuado de sustancias químicas; factores que inciden en el deterioro de la salud de sus moradores. Por lo tanto, este trabajo plantea como objetivos: 1) Diseñar, desarrollar y transferir estrategias y disposiciones arquitectónicas y tecnológicas para el mejoramiento de la calidad del aire interior en viviendas populares rurales; 2) alcanzar un desarrollo comunitario local sostenible. Se emplea como Metodología la Investigación Acción Participativa. Los resultados alcanzados son: a) estructuración y definición de los marcos: teórico y metodológico; b) definición del área geográfica; c) relevamientos y diagnósticos; d) concienciación, capacitación y formación; e) implementación de disposiciones arquitectónicas y tecnológicas; f) Inicio de mediciones de CO.Internal pollution of the Domestic Rural habit occurs by: 1) inefficient systems for cooking, backing and heating; 2) inappropriate fuels use; 3) employment of harmful materials for construction; 4) inadequate ventilation of the spaces; 5) inappropriate use and storage of chemical substances; these factors affect the deterioration of its habitant’s health. Therefore, this work rises as objectives: 1) design, develop and transfer of strategies and architectural and technological arrangements for improving the quality indoor air in rural popular houses; 2) sustainable community development. The participation - action research is used as methodology. The results achieved are to: a) structuring and definition of the theoretical and methodological frames; b) definition of the geographic area; c) diagnostics; d) awareness and training; e) implementation of architectural and technological dispositions; f) start measurements start.Asociación Argentina de Energías Renovables y Medio Ambiente (ASADES

Transition from molecular complex to quantum solvation in OCS(He)_N

We present quantum calculations of the rotational energy levels and spectroscopic rotational constants of the linear OCS molecule in variable size clusters of 4He, using spectral evolution quantum Monte Carlo methods that allow excited states to be accessed without nodal constraints. The rotational constants of OCS are found to decrease monotonically from the gas phase value as the number of helium atoms increases to N=6, after which the average constant increases to saturation at a value in excellent agreement with experimental measurements made on significantly larger clusters (N>1000). The minimum is shown to indicate a transition from a molecular complex to a quantum solvated molecule, with the former characterized by floppy but near rigid behavior, while the latter is characterized by non-zero permutation exchanges and a smaller extent of rigid coupling.Comment: 4 pages, 1 figure, submitted to Phys. Rev. Lett. on July 18,200

Calidad del aire interior en el hábitat doméstico popular rural

La contaminación interior del hábitat domestico popular se produce, entre otros, por; 1) utilización de sistemas ineficientes de cocción y horneado de alimentos y calefacción; 2) uso inapropiado de combustibles; 3) empleo de materiales nocivos para la construcción; 4) ventilación inadecuada de los espacios; 5) uso y almacenamiento inadecuado de sustancias químicas; factores que inciden en el deterioro de la salud de sus moradores. Por lo tanto, este trabajo plantea como objetivos: 1) Diseñar, desarrollar y transferir estrategias y disposiciones arquitectónicas y tecnológicas para el mejoramiento de la calidad del aire interior en viviendas populares rurales; 2) alcanzar un desarrollo comunitario local sostenible. Se emplea como Metodología la Investigación Acción Participativa. Los resultados alcanzados son: a) estructuración y definición de los marcos: teórico y metodológico; b) definición del área geográfica; c) relevamientos y diagnósticos; d) concienciación, capacitación y formación; e) implementación de disposiciones arquitectónicas y tecnológicas; f) Inicio de mediciones de CO.Internal pollution of the Domestic Rural habit occurs by: 1) inefficient systems for cooking, backing and heating; 2) inappropriate fuels use; 3) employment of harmful materials for construction; 4) inadequate ventilation of the spaces; 5) inappropriate use and storage of chemical substances; these factors affect the deterioration of its habitant’s health. Therefore, this work rises as objectives: 1) design, develop and transfer of strategies and architectural and technological arrangements for improving the quality indoor air in rural popular houses; 2) sustainable community development. The participation - action research is used as methodology. The results achieved are to: a) structuring and definition of the theoretical and methodological frames; b) definition of the geographic area; c) diagnostics; d) awareness and training; e) implementation of architectural and technological dispositions; f) start measurements start.Asociación Argentina de Energías Renovables y Medio Ambiente (ASADES

Witnessing eigenstates for quantum simulation of Hamiltonian spectra

The efficient calculation of Hamiltonian spectra, a problem often intractable on classical machines, can find application in many fields, from physics to chemistry. Here, we introduce the concept of an "eigenstate witness" and through it provide a new quantum approach which combines variational methods and phase estimation to approximate eigenvalues for both ground and excited states. This protocol is experimentally verified on a programmable silicon quantum photonic chip, a mass-manufacturable platform, which embeds entangled state generation, arbitrary controlled-unitary operations, and projective measurements. Both ground and excited states are experimentally found with fidelities >99%, and their eigenvalues are estimated with 32-bits of precision. We also investigate and discuss the scalability of the approach and study its performance through numerical simulations of more complex Hamiltonians. This result shows promising progress towards quantum chemistry on quantum computers.Comment: 9 pages, 4 figures, plus Supplementary Material [New version with minor typos corrected.