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• W84452690 abstract "We carry out a computation of chiral conductivities at strong coupling using holographic methods in Part II. To that end we implement chiral and mixed anomalies in the bulk by the use of suitable Chern-Simons terms. Then we study the cuto ow of anomalous conductivities by computing them at a hypersurface placed at certain radial position in spacetime, which models the energy cuto . Furthermore, we construct and analyze the holographic version of a two-component super uid. A two-component super uid has U(2) ! U(1) as the pattern of spontaneously broken symmetries and presents typically non-relativistic bosons in its spectrum of excitations (the so-called type II modes). We compute conductivities and dispersion relations for the hydrodynamic modes of the theory, as well as the gap of the so-called Goldstone, a massive excitation that has been predicted to have a universal gap. Moreover, motivated by the presence of type II bosons, we perform an analysis of the well-known Landau Criterion in the framework of our holographic models, showing that it holds. In addition, we construct a s+p-super uid, which features coexisting scalar and vector condensates. We also study its phase diagram after switching on two chemical potentials. Finally, we compute anomalous conductivities for U(1) holographic super uids. Along the way we also point out that there is charge density present whenever the super uid velocity is aligned with an external magnetic eld. This e ect absent if the theory is non-anomalous. The outcome of our calculation is that all chiral conductivities seem to approach universal values at zero temperature, even though they are not universal at - nite temperature. Such a universal value depends only on the interplay between broken symmetries and the anomaly. Llevamos a cabo un calculo de conductividades quirales en acoplamiento fuerte utilizando metodos holograficos en la Parte II. Para ello implementamos las anomalias quiral y mixta en el bulk utilizando los terminos de Chern-Simons adecuados. A continuacion se estudia el flujo de las conductividades anomalas en funcion de una escala de energia, calculandolas en una hipersuperficie colocada a cierto valor de la coordenada radial en el espacio-tiempo, que modela dicho cutoff de energia. Ademas, construimos y analizamos la version holografica de un superfl uido de dos componentes. Un superfl uido de dos componentes tiene U(2) ! U(1) como patron de simetrias espontaneamente rotas y presenta bosones de tipicamente no relativistas en su espectro de excitaciones (los llamados modos de de tipo II). Calculamos conductividades y relaciones de dispersion para los modos de hidrodinamicos de la teoria, asi como la masa del llamado Goldstone masivo, una excitacion que se ha predicho que posee una masa universal. Por otra parte, motivado por la presencia de bosones de de tipo II, llevamos a cabo un estudio del conocido Criterio de Landau en el marco de nuestros modelos holograficos, demostrando que se cumple. Ademas, se construye un superfl uido s+p, que se caracteriza por tener condensados escalar y vectorial coexistentes. Tambien estudiamos el diagrama de fase tras encender dos potenciales quimicos. Por ultimo, calculamos conductividades anomalas para superfl uidos holograficas U(1). En el proceso tambien enfatizamos la existencia de una densidad de carga presente siempre que la supervelocidad este alineada con un campo magnetico externo. Este efecto esta ausente si la teoria no es anomala. El resultado de nuestro calculo se resume en que todas las conductividades quirales parecen aproximarse a valores universales a temperatura cero, a pesar de que no son universales a temperatura finita. Dicho valor universal solo depende de la interaccion entre las simetrias rotas y la(s) anomalia(s)" @default.
• W84452690 created "2016-06-24" @default.
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• W84452690 date "2014-09-11" @default.
• W84452690 modified "2023-09-27" @default.
• W84452690 title "Applications of holography to condensed matter Physics" @default.
• W84452690 hasPublicationYear "2014" @default.
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