Spin critical opalescence in zero temperature Bose-Einstein Condensates

Cold atom developments suggest the prospect of measuring scaling properties and long-range fluctuations of continuous phase transitions at zero-temperature. We discuss the conditions for characterizing the phase separation of Bose-Einstein condensates of boson atoms in two distinct hyperfine spin states. The mean-field description breaks down as the system approaches the transition from the miscible side. An effective spin description clarifies the ferromagnetic nature of the transition. We show that a difference in the scattering lengths for the bosons in the same spin state leads to an effective internal magnetic field. The conditions at which the internal magnetic field vanishes (i.e., equal values of the like-boson scattering lengths) is a special point. We show that the long range density fluctuations are suppressed near that point while the effective spin exhibits the long-range fluctuations that characterize critical points. The zero-temperature system exhibits critical opalescence with respect to long wavelength waves of impurity atoms that interact with the bosons in a spin-dependent manner.Comment: 6 pages, 2 figure

Exploring the role of consistency of social value orientations : temporal stability, reciprocal cooperation, and forgiveness.

Many studies of social interaction have incorporated the nature of social value orientations (pro-social vs. pro-self) as an important factor. This paper extends this literature by showing that the effect of the nature of social value orientations is moderated by the consistency of social value orientations (high vs. low). In three studies, we examined this moderating influence. In Study 1, we investigated the temporal stability of social value orientations and found that high consistent orientations are more stable than low consistent orientations. In Studies 2 and 3, we found evidence for the moderating impact of consistency of social value orientations on reciprocal cooperation and forgiveness. High consistent individuals were more likely to follow the nature of their social value orientation than low consistent individuals.

Interpetative thinking and impression formation in a prisoner's dilemma game.

In three experiments we examined the notion that interpretative thinking guides impression formation when playing a prisoner's dilemma game. In a first experiment, we demonstrated that an interpretation goal is spontaneously triggered upon receiving ambiguous information about an interaction partner in the context of a prisoner's dilemma game. In Experiment 2, we examined whether in this context accessible knowledge is used as an interpretation frame for judging the interaction partner. Indeed, we found that subliminally primed extreme person exemplars led to an assimilation effect in person judgment in a prisoner's dilemma game, whereas they led to a contrast effect when person judgments were made in a control condition. Finally in experiment 3, priming a comparison goal before entering a prisoner's dilemma game led participants to use subliminally presented extreme exemplars again as a standard of comparison in the judgment of an interaction partner.Information; Knowledge;

Self-localized impurities embedded in a one dimensional Bose-Einstein condensate and their quantum fluctuations

We consider the self-localization of neutral impurity atoms in a Bose-Einstein condensate in a 1D model. Within the strong coupling approach, we show that the self-localized state exhibits parametric soliton behavior. The corresponding stationary states are analogous to the solitons of non-linear optics and to the solitonic solutions of the Schroedinger-Newton equation (which appears in models that consider the connection between quantum mechanics and gravitation). In addition, we present a Bogoliubov-de-Gennes formalism to describe the quantum fluctuations around the product state of the strong coupling description. Our fluctuation calculations yield the excitation spectrum and reveal considerable corrections to the strong coupling description. The knowledge of the spectrum allows a spectroscopic detection of the impurity self-localization phenomenon.Comment: 7 pages, 5 figure

IDENTIFIKASI FAKTOR-FAKTOR YANG BERPENGARUH TERHADAP STRATEGI PEMASARAN PRODUK DUPA DENGAN PENDEKATAN ANALISIS SWOT (STUDI KASUS DI CV X)

CV X is one that is engaged in the marketing of incense with brand Pandavas. Incense is one of the means used to support traditional ceremony especially for Hindus and Buddhists study aims to estimate make the necessary marketing strategies to increase sales of incense and also to identify those factors internal and external to CV X. The problems that occur is the number of vendors that are equally incense incense sold so the competition resulting CV X decreased sales levels incense products are sold. It is therefore a strategy requires the CV X 2 that sold incense can compete and can increase sales. With the SWOT method is expected CV X can determine a good business strategy by analyzing the strengths, weaknesses, opportunities and threats are owned by CV X The results of the SWOT analysis of internal factors known to consist of product development., Perfume incense scented with their own concoction using self-created concoction, attractive cover design, have a lot of relationships, have an expert consultant in the areas of startegy and operational management, has had a supplier of raw materials imported incense, marketing has not been reliable in the product incense, many types of incense in the market, the brand is not widely known Pandavas incense and perfume not have a design that can be used handalan products and external factors consist of not much incense to run business agency system, a small incense box is huge and there is no chance of the game in similar products, incense products for everyday use, a good relationship with the consumer, the price continues to increase incense perfume, brand piracy Pandavas, and suppliers of raw materials are no longer provide the raw material to be purchased. From the results of research on the application of strategic analysis CV X position lies in quadrant I, which means CV X support the aggressive strategy / strategies that SO can use force to take advantage of existing opportunities. that is by developing a product for the taste of the market, as well as expand its distribution network and CV X must strengthen themselves by implementing intensive strategy is a strategy where the product developmenty CV X needs to improve or modify products current and strategies Market Penetration strategy through which this strategy CV X can add items for sales promotion and other promotional efforts. Keywords : Incense Pandavas, SWOT, Strategy and Busines

The University of Edinburgh natural history class lists 1782-1800

In 1779 Revd Dr John Walker was appointed to be the University of Edinburgh’s Professor of Natural History. Because of the institutional structure of the university, he took care to keep detailed class lists from 1782 to 1800. These are extant in the University of Edinburgh’s Special Collections Department. As many of the students on the lists would go on to have a profound impact on the practice of nineteenth century natural history, I have compiled them into a table so that they can be used as a reference tool for those interested in the study of natural history in Edinburgh during the late eighteenth century. The table is arranged into columns that state the student’s name, degree, year of attendance and geographic origin. To help the reader better understand the table, I have written a brief introductory essay that addresses Walker’s organisation of the course and the types of students who attended the lectures. It also identifies the prominent role played by chemistry in Edinburgh’s natural history community and discusses the foundation of the Student Natural History Society of Edinburgh

Improved stick number upper bounds

2019 Spring.Includes bibliographical references.A stick knot is a mathematical knot formed by a chain of straight line segments. For a knot K, define the stick number of K, denoted stick(K), to be the minimum number of straight edges necessary to form a stick knot which is equivalent to K. Stick number is a knot invariant whose precise value is unknown for the large majority of knots, although theoretical and observed bounds exist. There is a natural correspondence between stick knots and polygons in R3. Previous research has attempted to improve observed stick number upper bounds by computationally generating such polygons and identifying the knots that they form. This thesis presents a new variation on this method which generates equilateral polygons in tight confinement, thereby increasing the incidence of polygons forming complex knots. Our generation strategy is to sample from the space of confined polygons by leveraging the toric symplectic structure of this space. An efficient sampling algorithm based on this structure is described. This method was used to discover the precise stick number of knots 935, 939, 943, 945, and 948. In addition, the best-known stick number upper bounds were improved for 60 other knots with crossing number ten and below