Schroedinger vs. Navier-Stokes

[EN] Quantum mechanics has been argued to be a coarse-graining of some underlying deterministic theory. Here we support this view by establishing a map between certain solutions of the Schroedinger equation, and the corresponding solutions of the irrotational Navier-Stokes equation for viscous fluid flow. As a physical model for the fluid itself we propose the quantum probability fluid. It turns out that the (state-dependent) viscosity of this fluid is proportional to Planck's constant, while the volume density of entropy is proportional to Boltzmann's constant. Stationary states have zero viscosity and a vanishing time rate of entropy density. On the other hand, the nonzero viscosity of nonstationary states provides an information-loss mechanism whereby a deterministic theory (a classical fluid governed by the Navier-Stokes equation) gives rise to an emergent theory (a quantum particle governed by the Schroedinger equation).Fernández De Córdoba, P.; Isidro San Juan, JM.; Vazquez Molina, J. (2016). Schroedinger vs. Navier-Stokes. Entropy. 18(1):1-11. doi:10.3390/e18010034S11118

The Use of Stone Columns on Settlement and Liquefaction Susceptible Soils

The new Paradisus Coco Beach Resort in Rio Grande (PR) is located on an old swamp area, which has been filled with relatively clean to silty sands. The swampy deposits consists of organic silts, peat and loose fine to medium sand and silty sand. The project requires the placement of 1.0 to 1.5 meters of additional fill together with the construction of light structures. The need for the fill will trigger the development of settlements in the underlaying weak, and compressible stratum. Furthermore, the susceptibility of the loose sand to liquefaction during an earthquake was considered. This paper describes the soil improvement by means of vibro-replacement, the purpose of which was threefold: reduction in total and differential settlement, acceleration of settlements during the surcharge period and densification of the loose sand to reduce its liquefaction potential. The predesign is presented together with relevant construction details of the preliminary trial areas from which the final column diameter and grid spacing were derived. Instrumentation together with settlement observations during the surcharge period are presented as well and compared with the initial predictions

Entropy, Topological Theories and Emergent Quantum Mechanics

[EN] The classical thermostatics of equilibrium processes is shown to possess a quantum mechanical dual theory with a finite dimensional Hilbert space of quantum states. Specifically, the kernel of a certain Hamiltonian operator becomes the Hilbert space of quasistatic quantum mechanics. The relation of thermostatics to topological field theory is also discussed in the context of the approach of the emergence of quantum theory, where the concept of entropy plays a key role.Research supported by grant No. ENE2015-71333-R (Spain).Cabrera, D.; Fernández De Córdoba Castellá, PJ.; Isidro San Juan, JM.; Vazquez Molina, J. (2017). Entropy, Topological Theories and Emergent Quantum Mechanics. Entropy. 19(3). https://doi.org/10.3390/e19030087S19

Simulador de dispositivos SLM basados en cristal líquido

En este trabajo, se presenta un simulador de modulación de fase espacial para su uso en comunicaciones ópticas de espacio libre. El simulador está basado en dispositivos TNLCD (Twisted Nematic Liquid Crystal Display). En primer lugar, se examinan las características y propiedades de los cristales líquidos como medios uniáxicos birrefrigentes. Posteriormente, mediante un modelo analítico simple, se caracterizan los diferentes elementos ópticos de un modulador espacial de luz (SLM) en términos de sus correspondientes matrices de Jones. Las expresiones deducidas en esta caracterización se utilizan en la herramienta de simulación para obtener la diferencia de fase espacial y la transmitancia producida por el SLM. Finalmente, el funcionamiento del simulador se ha verificado comparando resultados teóricos y de simulación para diferentes excitaciones de pruebaUniversidad de Málaga. Campus de Excelencia Internacional Andalucía Tec

Results of the engineering run of the coherent neutrino nucleus interaction experiment (CONNIE)

The CONNIE detector prototype is operating at a distance of 30 m from the core of a 3.8 GWth nuclear reactor with the goal of establishing Charge-Coupled Devices (CCD) as a new technology for the detection of coherent elastic neutrino-nucleus scattering. We report on the results of the engineering run with an active mass of 4 g of silicon. The CCD array is described, and the performance observed during the first year is discussed. A compact passive shield was deployed around the detector, producing an order of magnitude reduction in the background rate. The remaining background observed during the run was stable, and dominated by internal contamination in the detector packaging materials. The in-situ calibration of the detector using X-ray lines from fluorescence demonstrates good stability of the readout system. The event rates with the reactor ON and OFF are compared, and no excess is observed coming from nuclear fission at the power plant. The upper limit for the neutrino event rate is set two orders of magnitude above the expectations for the standard model. The results demonstrate the cryogenic CCD-based detector can be remotely operated at the reactor site with stable noise below2 e RMS and stable background rates. The success of the engineering test provides a clear path for the upgraded 100 g detector to be deployed during 2016.Fil: Aguilar Arevalo, A.. Universidad Nacional Autónoma de México; MéxicoFil: Bertou, Xavier Pierre Louis. Comisión Nacional de Energía Atómica; Argentina. Comisión Nacional de Energía Atómica. Fundación José A. Balseiro; ArgentinaFil: Bonifazi, C.. Universidade Federal do Rio de Janeiro; BrasilFil: Butner, M.. Fermi National Accelerator Laboratory; Estados UnidosFil: Cancelo, G.. Fermi National Accelerator Laboratory; Estados UnidosFil: Castañeda Vazquez, A.. Universidad Nacional Autónoma de México; MéxicoFil: Cervantes Vergara, B.. Universidad Nacional Autónoma de México; MéxicoFil: Chavez, C. R.. Universidad Nacional de Asunción; ParaguayFil: Da Motta, H.. Centro Brasileiro de Pesquisas Físicas; BrasilFil: D'Olivo, J. C.. Universidad Nacional Autónoma de México; MéxicoFil: Dos Anjos, J.. Centro Brasileiro de Pesquisas Físicas; BrasilFil: Estrada, J.. Fermi National Accelerator Laboratory; Estados UnidosFil: Fernández Moroni, Guillermo. Universidad Nacional del Sur. Departamento de Ingeniería Eléctrica y de Computadoras. Instituto ; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Ford, R.. Fermi National Accelerator Laboratory; Estados UnidosFil: Foguel, A.. Centro Brasileiro de Pesquisas Físicas; Brasil. Universidade Federal do Rio de Janeiro; BrasilFil: Hernandez Torres, K. P.. Universidad Nacional Autónoma de México; MéxicoFil: Izraelevitch, F.. Fermi National Accelerator Laboratory; Estados UnidosFil: Kavner, A.. University of Michigan; Estados UnidosFil: Kilminster, B.. Universitat Zurich; SuizaFil: Kuk, K.. Fermi National Accelerator Laboratory; Estados UnidosFil: Lima Jr, H. P.. Centro Brasileiro de Pesquisas Físicas; BrasilFil: Makler, M.. Centro Brasileiro de Pesquisas Físicas; BrasilFil: Molina, J.. Universidad Nacional de Asunción; ParaguayFil: Moreno Granados, G.. Universidad Nacional Autónoma de México; MéxicoFil: Moro, Juan Manuel. Universidad Nacional del Sur. Departamento de Ingeniería; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Paolini, Eduardo Emilio. Universidad Nacional del Sur. Departamento de Ingeniería Eléctrica y de Computadoras. Instituto ; ArgentinaFil: Sofo Haro, Miguel Francisco. Comision Nacional de Energia Atomica. Gerencia D/area de Energia Nuclear; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Tiffenberg, Javier Sebastian. Fermi National Accelerator Laboratory; Estados Unidos. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Trillaud, F.. Universidad Nacional Autónoma de México; MéxicoFil: Wagner, S.. Centro Brasileiro de Pesquisas Físicas; Brasil. Pontificia Universidade Católica do Rio Grande do Sul; Brasi

The holographic quantum

[EN] We present a map of standard quantum mechanics onto a dual theory, that of the classical thermodynamics of irreversible processes. While no gravity is present in our construction, our map exhibits features that are reminiscent of the holographic principle of quantum gravity.Fernández De Córdoba, P.; Isidro San Juan, JM.; Vazquez Molina, J. (2016). The holographic quantum. Foundations of Physics. 46(7):787-803. doi:10.1007/s10701-015-9986-2S787803467Acosta, D., Fernández de Córdoba, P., Isidro, J.M., Santander, J.: An entropic picture of emergent quantum mechanics. Int. J. Geom. Methods Mod. Phys. 9, 1250048 (2012). arXiv:1107.1898 [hep-th]Acosta, D., Fernández de Córdoba, P., Isidro, J.M., Santander, J.L.G.: Emergent quantum mechanics as a classical, irreversible thermodynamics. Int. J. Geom. Methods Mod. Phys. 10, 1350007 (2013). arXiv:1206.4941 [math-ph]Bousso, R.: The holographic principle. Rev. Mod. Phys. 74, 825 (2002). arXiv:hep-th/0203101Blasone, M., Jizba, P., Vitiello, G.: Quantization and dissipation. Phys. Lett. A 287, 205 (2001). arXiv:hep-th/0007138L. de Broglie: La thermodynamique cachée des particules. Ann. Inst. Poincaré (A) Phys. Théorique 1, 1 (1964)Callen, H.: Thermodynamics. Wiley, New York (1960)Carroll, R.: On the Emergence Theme of Physics. World Scientific, Singapore (2010)G. Cohen-Tannoudji: An Interpretive Conjecture for Physics Beyond the Standard Models: Generalized Complementarity. arXiv:1402.0823 [gr-qc]Doob, J.: Stochastic Processes. Wiley, New York (1953)Elze, H.-T.: Symmetry aspects in emergent quantum mechanics. J. Phys. Conf. Ser. 171, 012034 (2009)Fernández de Córdoba, P., Isidro, J.M., Perea, M.H.: Emergent quantum mechanics as a thermal ensemble. Int. J. Geom. Methods Mod. Phys. 11, 1450068 (2014). arXiv:1304.6295 [math-ph]Fernández de Córdoba, P., Isidro, J.M., Perea, M.H., Vazquez Molina, J.: The irreversible quantum. Int. J. Geom. Methods Mod. Phys. 12, 1550013 (2015). arXiv:1311.2787 [quant-ph]Fernández de Córdoba, P., Isidro, J.M., Vazquez Molina, J.: Schroedinger vs. Navier–Stokes. arXiv:1409.7036 [math-ph]Feynman, R.: Space-time approach to non-relativistic quantum mechanics. Rev. Mod. Phys. 20, 367 (1948)Hartnoll, S.: Lectures on holographic methods for condensed matter physics. Class. Quantum Gravity 26, 224002 (2009). arXiv:0903.3246 [hep-th]G. ’t Hooft: Quantum gravity as a dissipative deterministic system. Class. Quantum Gravity 16, 3263 (1999). arXiv:gr-qc/9903084G. ’t Hooft: Emergent quantum mechanics and emergent symmetries. AIP Conf. Proc. 957, 154 (2007). arXiv:0707.4568 [hep-th]Kim, Y., Shin, I., Tsukioka, T.: Holographic QCD: past, present, and future. Prog. Part. Nucl. Phys. 68, 55 (2013). arXiv:1205.4852 [hep-ph]Kolekar, S., Padmanabhan, T.: Indistinguishability of thermal and quantum fluctuations. Class. Quantum Gravity 32, 202001 (2015). arXiv:1308.6289 [gr-qc]Landauer, R.: Irreversibility and heat generation in the computing process. IBM J. Res. Dev. 5, 183 (1961)Maldacena, J.: The large N limit of superconformal field theories and supergravity. Adv. Theor. Math. Phys. 2, 231 (1998). arXiv:hep-th/9711200Matone, M.: Thermodynamique cachée des particules and the quantum potential. Ann. Fond. Broglie 37, 177 (2012). arXiv:1111.0270 [hep-ph]Onsager, L., Machlup, S.: Fluctuations and irreversible processes. Phys. Rev. 91, 1505 (1953)Padmanabhan, T.: Thermodynamical aspects of gravity: new insights. Rep. Prog. Phys. 73, 046901 (2010). arXiv:0911.5004 [gr-qc]Padmanabhan, T.: General relativity from a thermodynamic perspective. Gen. Relativ. Gravit. 46, 1673 (2014). arXiv:1312.3253 [gr-qc]Penrose, R.: The Road to Reality. Jonathan Cape, London (2004)Prigogine, I.: Introduction to Thermodynamics of Irreversible Processes. Interscience, New York (1961)Smolin, L.: On the nature of quantum fluctuations and their relation to gravitation and the principle of inertia. Class. Quantum Gravity 3, 347 (1986)Smolin, L.: Quantum gravity and the statistical interpretation of quantum mechanics. Int. J. Theor. Phys. 25, 215 (1986)Stephens, C., ’ t Hooft, G., Whiting, B.: Black hole evaporation without information loss. Class. Quantum Gravity 11, 621 (1994). arXiv:gr-qc/9310006Susskind, L.: The world as a hologram. J. Math. Phys. 36, 6377 (1995). arXiv:hep-th/9409089Verlinde, E.: On the origin of gravity and the laws of Newton. JHEP 1104, 029 (2011). arXiv:1001.0785 [hep-th]Witten, E.: Anti-de Sitter space and holography. Adv. Theor. Math. Phys. 2, 253 (1998). arXiv:hep-th/980215

The biology and behavior of the longhorned beetle, Dectes texanus on sunflower and soybean

The biology and behavior of the longhorned beetle Dectes texanus LeConte (Coleoptera: Cerambycidae) was studied on two host plants that suffer economic losses from this pest; sunflower, Helianthus annuus, and soybean, Glycines max. Reciprocal crosses of D. texanus collected from the two plants all produced viable progeny, indicating that conspecific insects attack both crops. Pupae from soybean stalks weighed about 40% less than those from sunflower, and adults fed on soybean lived a mean of 23 days, compared to a mean of 53 days (males) and 76 days (females) for those fed sunflower. A female's larval host plant had no effect on her tendency to ovipuncture plants of either type in a greenhouse trial. A field-tested population collected exclusively from sunflower contained three types of females in similar proportions: those that laid eggs only on sunflower, those that laid only on soybean, and those that laid equally on both host plants. Females in field trials fed more on the plant they had fed on in the laboratory, but soybean-fed females fed more on soybean than did sunflower-fed females. Females fed soybean also made more ovipunctures on soybean plants in field trials than sunflower-fed females, but their responses to sunflower plants were similar. Females displayed higher total ovipositional activity when they encountered sunflower first in the field, and lower total activity when they encountered soybean first. Feeding scores were significantly correlated with ovipunctures and eggs on both plant types. We conclude that sunflower is the preferred host plant, although females will accept soybean when it is the only available food. The results suggest that D. texanus is still in the initial stages of a host range expansion with female host selection behavior demonstrating both genetic influences and phenotypic flexibility. Sunflower represents a nutritionally superior, ancestral host plant and relatively high fitness costs are still associated with utilization of the novel host plant, soybean, costs that may be offset by benefits such as reduced intraspecific competition. These potential benefits and their consequent implications for D. texanus host range evolution are hypothesized and discussed

The Schrödinger equation in the context of fluid mechanics

[ES] Se deriva un mapeo entre la ecuación de Schr¿odinger y la de Navier-Stokes, que generaliza el que propuso Madelung en 1926 con la ecuación de Euler. Dado que la mecánica de fluidos es el paradigma de teoría emergente, estos mapeos apoyan la interpretación de la mecánica cuántica como una teoría efectiva, emergente a partir de otra más fundamental. En el nuevo mapeo, además, el potencial cuántico se identifica con el término viscoso, en línea con recientes estudios que afirman que la cuanticidad tiene un origen disipativo.[EN] We derive a mapping between the Schro¿ dinger equation and the Navier-Stokes equation, which generalizes the one proposed by Madelung in 1926 with the Euler equation. Since ¿uid mechanics is the paradigm of an emergent theory, these maps support the interpretation of quantum mechanics as an effective theory, emerging from a more fundamental one. In the new mapping, moreover, the quantum potential is identi¿ed with the viscous term, in line with recent studies that claim that quantumness has a dissipative origin.J. Vazquez agradece a Manuel Monleón Pradas las referencias y discusiones sobre mecánica del medio continuo, y agradece la financiación al Programa de Becas de Movilidad Académica de la AUIP y al Programa de Ayudas de Investigación y Desarrollo de la UPV. D. Cabrera agradece la financiación del proyecto con Ref. FIS2014-51948-C2-1-P del Ministerio de Economía y Competitividad (España).Cabrera, D.; Fernández De Córdoba Castellá, PJ.; Isidro San Juan, JM.; Valdés Placeres, JM.; Vazquez Molina, J. (2016). La ecuación de Schrödinger en el contexto de la mecánica de fluidos. Revista Cubana de Fisica. 33(2):98-101. http://hdl.handle.net/10251/150048S9810133