Cross-Phase Modulation Enhancement Via a Resonating Cavity: Semiclassical Description

We evaluate the advantages of performing cross-phase modulation (XPM) on a very-far-off-resonance atomic system. We consider a ladder system with a weak (few-photon level) control coherent field imparting a conditional nonlinear phase shift on a probe beam. We find that by coupling to an optical resonator the optimal XPM is enhanced proportional to the finesse of the resonator by a factor of $F/4\pi$. We present a semi-classical description of the system and show that the phenomenon is optimal in the self-defined condition of off-resonance-effective-cooperativity equal to one

Variational description of Gibbs-non-Gibbs dynamical transitions for spin-flip systems with a Kac-type interaction

We continue our study of Gibbs-non-Gibbs dynamical transitions. In the present paper we consider a system of Ising spins on a large discrete torus with a Kac-type interaction subject to an independent spin-flip dynamics (infinite-temperature Glauber dynamics). We show that, in accordance with the program outlined in \cite{vEFedHoRe10}, in the thermodynamic limit Gibbs-non-Gibbs dynamical transitions are \emph{equivalent} to bifurcations in the set of global minima of the large-deviation rate function for the trajectories of the empirical density \emph{conditional} on their endpoint. More precisely, the time-evolved measure is non-Gibbs if and only if this set is not a singleton for \emph{some} value of the endpoint. A partial description of the possible scenarios of bifurcation is given, leading to a characterization of passages from Gibbs to non-Gibbs and vice versa, with sharp transition times. Our analysis provides a conceptual step-up from our earlier work on Gibbs-non-Gibbs dynamical transitions for the Curie-Weiss model, where the mean-field interaction allowed us to focus on trajectories of the empirical magnetization rather than the empirical density.Comment: Key words and phrases: Curie-Weiss model, Kac model, spin-flip dynamics, Gibbs versus non-Gibbs, dynamical transition, large deviation principles, action integral, bifurcation of rate functio

Una nueva especie de Paradoneis Hartman, 1965 (Annelida: Paraonidae) procedente del NE de la península Ibérica (SE del golfo de Vizcaya, NE del océano Atlántico)

A new species of the genus Paradoneis Hartman, 1965 (Annelida, Paraonidae) has been identified from circalittoral soft bottoms of Basque Country (NE Iberian Peninsula, SE Bay of Biscay). The new species is mainly characterized by having small size, three prebranchial chaetigers, five (exceptionally, six) pairs of thin apinnate branchiae, modified notochaetae lyriform, and pygidial region whit seven cirri. In the present paper, the new species is described, illustrated and discussed. Some notes on its ecology and distribution in the area is also included. In addition, an identification key is provided for all known Paradoneis species. The Type Material has been deposited in the Museo Nacional de Ciencias Naturales, Madrid. urn:lsid:zoobank.org:pub:BA4A3BE4-AD07-4761-90C6-44E80D4F0276Una especie nueva del género Paradoneis Hartman, 1965 (Annelida, Paraonidae) ha sido identificada en fondos blandos del País Vasco (NE de la península Ibérica, SE del golfo de Vizcaya). La nueva especie se caracteriza principalmente por su pequeña talla, tres segmentos setígeros prebranquiales, cinco (excepcionalmente seis) pares de delgadas branquias simples, notosedas modificadas liriformes, y una región pigidial con siete cirros. En el presente artículo se realiza una descripción, ilustración y discusión de la nueva especie, aportándose también información sobre su ecología y distribución. Complementariamente, se aporta una clave de identificación de todas las especies conocidas de Paradoneis. El Material Tipo ha sido depositado en el Museo Nacional de Ciencias Naturales, Madrid

Practical Advantages of Almost-Balanced-Weak-Values Metrological Techniques

Precision measurements of ultra-small linear velocities of one of the mirrors in a Michelson interferometer are performed using two different weak-values techniques. We show that the technique of Almost-Balanced Weak Values (ABWV) offers practical advantages over the technique of Weak-Value Amplification (WVA), resulting in larger signal-to-noise ratios and the possibility of longer integration times due to robustness to slow drifts. As an example of the performance of the ABWV protocol we report a velocity sensitivity of 60 fm/s after 40 hours of integration time. The sensitivity of the Doppler shift due to the moving mirror is of 150 nHz

Poemas y relatos al aire.

Soraya Julián (biografía): Maestría en Metodología de la Investigación Científica, Maestría en Ciencias de la Educación, Especialidad en Educación en Entorno Virtual, Especialidad en Orientación Educativa Psicopedagógica. Licenciada en Teatro, mención Dirección Teatral; Licenciada en Psicología, Diplomado en Estudios Superiores en Ciencias Pedagógicas con mención en Enseñanza de las Ciencias. Experta en De Bono Thinking. Conferencista College Board de Puerto Rico y América Latina. Tiene cursos de inglés, portugués e italiano. Actualmente trabaja como psicóloga en el Departamento de Bienestar Universitario y como docente de las asignaturas Orientación Universitaria y Metodología de la Investigación Científica, en la Unapec. Escribe cuentos, obras de teatro y poesía, entre otros

Manifiesto femenino (poemas)

Soraya Julián (biografía): Maestría en Metodología de la Investigación Científica, Maestría en Ciencias de la Educación, Especialidad en Educación en Entorno Virtual, Especialidad en Orientación Educativa Psicopedagógica. Licenciada en Teatro, mención Dirección Teatral; Licenciada en Psicología, Diplomado en Estudios Superiores en Ciencias Pedagógicas con mención en Enseñanza de las Ciencias. Experta en De Bono Thinking. Conferencista College Board de Puerto Rico y América Latina. Tiene cursos de inglés, portugués e italiano. Actualmente trabaja como psicóloga en el Departamento de Bienestar Universitario y como docente de las asignaturas Orientación Universitaria y Metodología de la Investigación Científica, en la Unapec. Escribe cuentos, obras de teatro y poesía, entre otros.Universidad APE

Technical advantages for weak value amplification: When less is more

The technical merits of weak value amplification techniques are analyzed. We consider models of several different types of technical noise in an optical context and show that weak value amplification techniques (which only use a small fraction of the photons) compare favorably with standard techniques (which uses all of them). Using the Fisher information metric, we demonstrate that weak value techniques can put all of the Fisher information about the detected parameter into a small portion of the events and show how this fact alone gives technical advantages. We go on to consider a time correlated noise model, and find that a Fisher information analysis indicates that while the standard method can have much larger information about the detected parameter than the postselected technique. However, the estimator needed to gather the information is technically difficult to implement, showing that the inefficient (but practical) signal-to-noise estimation of the parameter is usually superior. We also describe other technical advantages unique to imaginary weak value amplification techniques, focusing on beam deflection measurements. In this case, we discuss combined noise types (such as detector transverse jitter, angular beam jitter before the interferometer and turbulence) for which the interferometric weak value technique gives higher Fisher information over conventional methods. We go on to calculate the Fisher information of the recently proposed photon recycling scheme for beam deflection measurements, and show it further boosts the Fisher information by the inverse postselection probability relative to the standard measurement case

Distributed MPC with time-varying communication network: A density-dependent population games approach

© 2016 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.This work addresses distributed control design by using density-dependent population dynamics. Furthermore, stability of the equilibrium point under this proposed class of population dynamics is studied, and the relationship between the equilibrium point of density-dependent population games (DDPG) and the solution of constrained optimization problems is shown. Finally, a distributed predictive control is designed with the proposed density-dependent dynamics, and contemplating a time-varying communication network.Peer ReviewedPostprint (author's final draft

Constrained distributed optimization : A population dynamics approach

Large-scale network systems involve a large number of states, which makes the design of real-time controllers a challenging task. A distributed controller design allows to reduce computational requirements since tasks are divided into different systems, allowing real-time processing. This paper proposes a novel methodology for solving constrained optimization problems in a distributed way inspired by population dynamics. This methodology consists of an extension of a population dynamics equation and the introduction of a mass dynamics equation. The proposed methodology divides the problem into smaller sub-problems, whose feasible regions vary over time achieving an agreement to solve the global problem. The methodology also guarantees attraction to the feasible region and allows to have few changes in the decision-making design when a network suffers the addition/removal of nodes/edges. Then, distributed controllers are designed with the proposed methodology and applied to the large-scale Barcelona Drinking Water Network (BDWN). Some simulations are presented and discussed in order to illustrate the control performance.Peer ReviewedPostprint (author's final draft