Misión en cuestión: antropología y evangelización en la Prelatura de Ayaviri (1968-1975)

Una nueva aproximación hacia la religiosidad popular —y su valoración— marcó significativamente la actuación de la Iglesia católica latinoamericana en las décadas posconciliares y dio lugar a un creciente número de investigaciones antropológicas de las subculturas religiosas. No obstante, las reformas de las prácticas evangelizadoras en línea con dichos estudios despertaron poco interés académico. Este artículo analiza la compleja relación entre antropología y misión en la Prelatura de Ayaviri (Puno), que a partir de la Conferencia Episcopal de Medellín (1968) se apoyó en la investigación científico-social para reformular su práctica pastoral. Específicamente, este artículo aclara cómo el renovado compromiso de la prelatura con el «otro», el campesino quechua, no solo contribuyó a la producción de conocimientos sobre el panorama sociorreligioso regional, sino también causó dificultades a una Iglesia cuya naturaleza misionera fue objeto de escrutinio y cambio a principios de los años setenta

Civil Society Activism under US Free Trade Agreements: The Effects of Actorness on Decent Work

US free trade agreements comprise unique provisions that enable civil society to present public complaints against labor rights violations occurring in the US or its trade partners. To date, a variety of complainants have used these mechanisms, including (inter)national trade unions, human rights organizations, and a priest. And yet, little is known about the submissions’ nature of agency and the effects it has on the procedural continuations to address illicit labor practices. To fill this research lacuna, this article employs a multidisciplinary framework of ‘actorness’ that measures the submitters’ diversity (professionalism/non-professionalism, collectivism/individualism, transnationalism/nationalism) and their effectiveness (rejection/acceptance of submissions and further procedural follow-ups). Combining quantitative examination with in-depth analysis of two diverse cases of actorness, and drawing on expert interviews, public reports, and minutes of meetings, the study reveals that the majority of public submissions were of professional, collective, and transnational nature. However, contrary to what extant literature suggests, this is not a guarantee that they achieve more far-reaching procedural steps in the protection of workers. Non-professional, individual, and national actorness can compensate for the advantages of professionalism, collectivism, and transnationalism

Transport Spectroscopy of a Spin-Coherent Dot-Cavity System

Quantum engineering requires controllable artificial systems with quantum coherence exceeding the device size and operation time. This can be achieved with geometrically confined low-dimensional electronic structures embedded within ultraclean materials, with prominent examples being artificial atoms (quantum dots) and quantum corrals (electronic cavities). Combining the two structures, we implement a mesoscopic coupled dot-cavity system in a high-mobility two-dimensional electron gas, and obtain an extended spin-singlet state in the regime of strong dot-cavity coupling. Engineering such extended quantum states presents a viable route for nonlocal spin coupling that is applicable for quantum information processing

Scattering matrix approach to interacting electron transport

We investigate the modification in mesoscopic electronic transport due to electron-electron interactions making use of scattering states. We demonstrate that for a specific (finite range) interaction kernel, the knowledge of the scattering matrix is sufficient to take interaction effects into account. We calculate perturbatively the corrections to the current and current-current correlator; in agreement with previous work, we find that, in linear response, interaction effects can be accounted for by an effective (renormalized) transmission probability. Beyond linear response, simple renormalization of scattering coefficients is not sufficient to describe the current-current correlator, as additional corrections arise due to irreducible two-particle processes. Furthermore, we find that the correlations between opposite-spin currents induced by interaction are enhanced for an asymmetric scatterer, generating a nonzero result already to lowest order in the interaction

A tunable, nonlinear Hong-Ou-Mandel interferometer

We investigate the two-photon scattering properties of a Jaynes-Cummings (JC) nonlinearity consisting of a two-level system (qubit) interacting with a single mode cavity, which is coupled to two waveguides, each containing a single incident photon wave packet initially. In this scattering setup, we study the interplay between the Hong-Ou-Mandel effect arising due to quantum interference and effective photon-photon interactions induced by the presence of the qubit. We calculate the two-photon scattering matrix of this system analytically and identify signatures of interference and interaction in the second order auto- and cross-correlation functions of the scattered photons. In the dispersive regime, when qubit and cavity are far detuned from each other, we find that the JC nonlinearity can be used as an almost linear, in-situ tunable beam splitter giving rise to ideal Hong-Ou-Mandel interference, generating a highly path-entangled two-photon NOON state of the scattered photons. The latter manifests itself in strongly suppressed waveguide cross-correlations and Poissonian photon number statistics in each waveguide. If the two-level system and the cavity are on resonance, the JC nonlinearity strongly modifies the ideal HOM conditions leading to a smaller degree of path entanglement and sub-poissonian photon number statistics. In the latter regime, we find that photon blockade is associated with bunched auto-correlations in both waveguides, while a two-polariton resonance can lead to bunched as well as anti-bunched correlations