Holographic quenches and anomalous transport

We study the response of the chiral magnetic effect due to continuous quenches induced by time dependent electric fields within holography. Concretely, we consider a holographic model with dual chiral anomaly and compute the electric current parallel to a constant, homogeneous magnetic field and a time dependent electric field in the probe approximation. We explicitly solve the PDEs by means of pseudospectral methods in spatial and time directions and study the transition to an universal "fast" quench response. Moreover, we compute the amplitudes, i.e.,~residues of the quasi normal modes, by solving the (ODE) Laplace transformed equations. We investigate the possibility of considering the asymptotic growth rate of the amplitudes as a well defined notion of initial time scale for linearized systems. Finally, we highlight the existence of Landau level resonances in the electrical conductivity parallel to a magnetic field at finite frequency and show explicitly that these only appear in presence of the anomaly. We show that the existence of these resonances induces, among others, a long-lived AC electric current once the electric field is switched off.Comment: 34 pages, 10 figure

Effects of Stride Rate Manipulation in Shoes with Different Drop Heights

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DKL Launches Digital Archive of 'Everything NPS'

A news article on the occasion of the launch of NPS Archive: Calhoun. Team members: back row: Sergio Topete, Luke Pederson, Simon Brown, Carlos Villanueva. Front row: Dorothy Nath, Melinda Nakagawa, Irene Berry. Published in the April 2012 issue of Update NPS.The Naval Postgraduate School's Dudley Knox Library has announced the launch of an extensive online institutional archive. The electronic repository, known as Calhoun, was created to bring NPS' scholarly contributions together, creating an easily searchable collection of scholarly, instructional and institutional publications and research products authored by members of the NPS community

Проект функционального размещения нестационарных торговых объектов на территории муниципального образования "Город Томск"

Выпускная квалификационная работа содержит 125 с., 13 рис., 9 табл., 31 источников, 6 приложений. Ключевые слова: потребительский рынок, нестационарный торговый объект, земельный участок, земли муниципальной собственности, размещение, киоск, павильон, ярмарка, критерии, аукцион, схема размещения НТО, территориальные зоны, типовой проект. Объектом исследования является земельный участок, находящий на землях муниципальной собственности или неразграниченной государственной собственности, находящийся по адресу: Томская обл., г. Томск, р-н Октябрьский, ул. Пушкина, 56/1 ст1. Цель работы - разработка проекта функционального размещения НТО на территории муниципального образования «Город Томск». В процессе выполнения выпускной квалификационной работы проводилось изучение теоретических аспектов ноFinale qualifiziert Arbeit enthält 125 p., 13 Abb., 9 Tabellen., 31 Quellen, 6-Anwendungen. Stichwort: Verbrauchermarkt, unsicherer gewerbliche Immobilien, Grundstücke, stadteigenen Grundstück, Unterkunft, Kioske, Pavillons, faire Kriterien, Auktion, Layout NTO, territorialen Bereich, ein Modellprojekt. Das Ziel der Forschung ist ein Grundstück, auf dem Land befindet oder auf nicht-kommunalen Eigentums, Staatseigentum, an der Adresse:. Tomsk, Tomsk, Oktyabrskiy Bezirk Str. Puschkin, 56/1 CT1. Der Zweck der Arbeit - Entwicklung funktioneller Unterkunft NTO im Gebiet der Gemeinde "Stadt Tomsk". Während der Ausführung der letzten Qualifikationsarbeiten durchgeführt, die theoretischen Aspekte des Rechts zu studieren - Rechtsrahmen für die Regulierung und Platzierung NTO in Tomsk. Die Studie i

Initial Mass Function Effects on the Colour Evolution of Disk Galaxies

Aims. In this work, we want to find out if the IMF can be determined from colour images, integrated colours, or mass-to-light ratios, especially at high redshift, where galaxies cannot be resolved into individual stars, which would enable us to investigate dependencies of the IMF on cosmological epoch. Methods. We use chemo-dynamical models to investigate the influence of the Initial Mass Function (IMF) on the evolution of a Milky Way-type disk galaxy, in particular of its colours. Results. We find that the effect of the IMF on the internal gas absorption is larger than its effect on the light from the stellar content. However, the two effects work in the opposite sense: An IMF with more high mass stars leads to brighter and bluer star-light, but also to more interstellar dust and thus to more absorption, causing a kind of “IMF degeneracy”. The most likely wavelength region in which to detect IMF effects is the infrared (i.e., JHK). We also provide photometric absorption and inclination corrections in the SDSS ugriz and the HST WFPC2 and NICMOS systems

Low temperature properties of holographic condensates

In the current work we study various models of holographic superconductors at low temperature. Generically the zero temperature limit of those models are solitonic solution with a zero sized horizon. Here we generalized simple version of those zero temperature solutions to small but non-zero temperature T. We confine ourselves to cases where near horizon geometry is AdS^4. At a non-zero temperature a small horizon would form deep inside this AdS^4 which does not disturb the UV physics. The resulting geometry may be matched with the zero temperature solution at an intermediate length scale. We understand this matching from separation of scales by setting up a perturbative expansion in gauge potential. We have a better analytic control in abelian case and quantities may be expressed in terms of hypergeometric function. From this we calculate low temperature behavior of various quatities like entropy, charge density and specific heat etc. We also calculate various energy gaps associated with p-wave holographic superconductor to understand the underlying pairing mechanism. The result deviates significantly from the corresponding weak coupling BCS counterpart.Comment: 17 Page

Role of loop entropy in the force induced melting of DNA hairpin

Dynamics of a single stranded DNA, which can form a hairpin have been studied in the constant force ensemble. Using Langevin dynamics simulations, we obtained the force-temperature diagram, which differs from the theoretical prediction based on the lattice model. Probability analysis of the extreme bases of the stem revealed that at high temperature, the hairpin to coil transition is entropy dominated and the loop contributes significantly in its opening. However, at low temperature, the transition is force driven and the hairpin opens from the stem side. It is shown that the elastic energy plays a crucial role at high force. As a result, the phase diagram differs significantly with the theoretical prediction.Comment: 9 pages, 8 figures; J. Chem. Phys (2011

Non-Equilibrium Field Dynamics of an Honest Holographic Superconductor

Most holographic models of superconducting systems neglect the effects of dynamical boundary gauge fields during the process of spontaneous symmetry-breaking. Usually a global symmetry gets broken. This yields a superfluid, which then is gauged "weakly" afterwards. In this work we build (and probe the dynamics of) a holographic model in which a local boundary symmetry is spontaneously broken instead. We compute two-point functions of dynamical non-Abelian gauge fields in the normal and in the broken phase, and find non-trivial gapless modes. Our AdS3 gravity dual realizes a p-wave superconductor in (1+1) dimensions. The ground state of this model also breaks (1+1)-dimensional parity spontaneously, while the Hamiltonian is parity-invariant. We discuss possible implications of our results for a wider class of holographic liquids.Comment: 32 pages, 12 figures; v3: string theory derivation of setup added (section 3.1), improved presentation, version accepted by JHEP; v2: paragraph added to discussion, figure added, references added, typos correcte

Holographic superfluids as duals of rotating black strings

We study the breaking of an Abelian symmetry close to the horizon of an uncharged rotating Anti-de Sitter black string in 3+1 dimensions. The boundary theory living on R^2 x S^1 has no rotation, but a magnetic field that is aligned with the axis of the black string. This boundary theory decribes non-rotating (2+1)-dimensional holographic superfluids with non-vanishing superfluid velocity. We study these superfluids in the grand canonical ensemble and show that for sufficiently small angular momentum of the dual black string and sufficiently small superfluid velocity the phase transition is 2nd order, while it becomes 1st order for larger superfluid velocity. Moreover, we observe that the phase transition is always 1st order above a critical value of the angular momentum independent of the choice of the superfluid velocity.Comment: 9 pages including 5 figures: v2: 12 pages including 7 figures; 2 figures added, discussion on free energy added; accepted for publication in JHE