On the 2D zero modes' algebra of the SU(n) WZNW model

A quantum group covariant extension of the chiral parts of the Wess-Zumino-Novikov-Witten model on a compact Lie group G gives rise to two matrix algebras with non-commutative entries. These are generated by "chiral zero modes" which combine in the 2D model into "Q-operators" which encode information about the internal symmetry and the fusion ring. We review earlier results about the SU(n) WZNW Q-algebra and its Fock representation for n=2 and display the first steps towards their generalization to higher n.Comment: 10 pages, Talk presented by L.H. at the International Workshop LT10 (17-23 June 2013, Varna, Bulgaria

Influence of disordered porous media in the anomalous properties of a simple water model

The thermodynamic, dynamic and structural behavior of a water-like system confined in a matrix is analyzed for increasing confining geometries. The liquid is modeled by a two dimensional associating lattice gas model that exhibits density and diffusion anomalies, in similarity to the anomalies present in liquid water. The matrix is a triangular lattice in which fixed obstacles impose restrictions to the occupation of the particles. We show that obstacules shortens all lines, including the phase coexistence, the critical and the anomalous lines. The inclusion of a very dense matrix not only suppress the anomalies but also the liquid-liquid critical point

Modelling background charge rearrangements near single-electron transistors as a Poisson process

Background charge rearrangements in metallic single-electron transistors are modelled in two-level tunnelling systems as a Poisson process with a scale parameter as only variable. The model explains the recent observation of asymmetric Coulomb blockade peak spacing distributions in metallic single-electron transistors. From the scale parameter we estimate the average size of the tunnelling systems, their density of states, and the height of their energy barrier. We conclude that the observed background charge rearrangements predominantly take place in the substrate of the single-electron transistor.Comment: 7 pages, 2 eps figures, used epl.cls macro include

Review of \u3ci\u3eEverything You Know about Indians Is Wrong\u3c/i\u3e by Paul Chaat Smith

In his recent collection of essays, associate curator at the National Museum of the American Indian Paul Chaat Smith argues for a reorientation of knowledge about Indian peoples. The essays, all previously published, are sometimes autobiographical, sometimes humorous, and range in topic from Ishi to the Alcatraz occupation. In The Big Movie, for example, Smith takes on films that feature Indians, from the first moving picture made by Thomas Edison in 1894, Sioux Ghost Dance, to The Searchers, Last of the Mohicans, and Dances with Wolves. Indians, Smith writes, have become a kind of national mascot. These films, particularly Westerns, are a part of the American master narrative-and, well, they never tell the real story. Smith often focuses his essays on central questions. In a piece called Luna Remembers, about artist James Luna, for instance, he asks, \u27\u27Are Indian people allowed to change? Are we allowed to invent completely new ways of being Indian that have no connection to previous ways we have lived? Smith writes, In North America the ideological prison that confines Indian agency has unique features. We have never been simply ignored, or simply romanticized, or been merely the targets of assimilation or genocide. It is rather all these things and many more, often at the same time in different places. In this essay and others, Smith questions the static image of Indian peoples and argues not only for the real story but also for a conceptualization of modern Indians that emphasizes agency and adaption-both politically and technologically

Review of \u3ci\u3eEverything You Know about Indians Is Wrong\u3c/i\u3e by Paul Chaat Smith

In his recent collection of essays, associate curator at the National Museum of the American Indian Paul Chaat Smith argues for a reorientation of knowledge about Indian peoples. The essays, all previously published, are sometimes autobiographical, sometimes humorous, and range in topic from Ishi to the Alcatraz occupation. In The Big Movie, for example, Smith takes on films that feature Indians, from the first moving picture made by Thomas Edison in 1894, Sioux Ghost Dance, to The Searchers, Last of the Mohicans, and Dances with Wolves. Indians, Smith writes, have become a kind of national mascot. These films, particularly Westerns, are a part of the American master narrative-and, well, they never tell the real story. Smith often focuses his essays on central questions. In a piece called Luna Remembers, about artist James Luna, for instance, he asks, \u27\u27Are Indian people allowed to change? Are we allowed to invent completely new ways of being Indian that have no connection to previous ways we have lived? Smith writes, In North America the ideological prison that confines Indian agency has unique features. We have never been simply ignored, or simply romanticized, or been merely the targets of assimilation or genocide. It is rather all these things and many more, often at the same time in different places. In this essay and others, Smith questions the static image of Indian peoples and argues not only for the real story but also for a conceptualization of modern Indians that emphasizes agency and adaption-both politically and technologically

Non-critical string pentagon equations and their solutions

We derive pentagon type relations for the 3-point boundary tachyon correlation functions in the non-critical open string theory with generic c_{matter} < 1 and study their solutions in the case of FZZ branes. A new general formula for the Liouville 3-point factor is derived.Comment: 18 pages, harvmac; misprints corrected, section 3.2 extended, a new general formula for the Liouville 3-point factor adde