Nuclear stopping and sideward-flow correlation from 0.35A to 200A GeV

The correlation between the nuclear stopping and the scale invariant nucleon sideward flow at energies ranging from those available at the GSI heavy ion synchrotron (SIS) to those at the CERN Super Proton Synchrotron (SPS) is studied within ultrarelativistic quantum molecular dynamics (UrQMD). The universal behavior of the two experimental observables for various colliding systems and scale impact parameters are found to be highly correlated with each other. As there is no phase transition mechanism involved in the UrQMD, the correlation may be broken down by the sudden change of the bulk properties of the nuclear matter, such as the formation of quark-gluon plasma (QGP), which can be employed as a QGP phase transition signal in high-energy heavy ion collisions. Furthermore, we also point out that the appearance of a breakdown of the correlation may be a powerful tool for searching for the critical point on the QCD phase diagram.Comment: 5 pages, 4 figure

The Chinese perception of quality: model building and analysis based on consumers' perception

Theory construction and data reconstruction are required for the evaluation of quality in China. Taking into consideration existing mature quality evaluation models (particularly the methods of evaluating customer satisfaction) and China's unique national conditions during its economic transition, four dimensions are proposed to evaluate quality in China: consumer satisfaction with quality, product safety, government regulations on quality, and citizen's concept of quality. Based on empirical investigation data in this framework, the overall evaluation of quality in China is summarized as quality in China has just reached a general standard, product safety remains steady as a whole, government quality regulations are ineffective, and Chinese citizens' concept of quality is poor. Correlation analyses show a positive relation between the effectiveness of government regulation on quality and Chinese citizens' concept of quality, consumer satisfaction with quality, and product safety. Finally, the paper proposes the implementation of an emphasis on product safety during quality elevation and quality improvement systems, such as the constant enhancement of quality regulation effects and Chinese citizens' concept of quality, to drive quality development

Controlling Entanglement Dynamics by Choosing Appropriate Ratio between Cavity-Fiber Coupling and Atom-Cavity Coupling

The entanglement characteristics including the so-called sudden death effect between two identical two-level atoms trapped in two separate cavities connected by an optical fiber are studied. The results show that the time evolution of entanglement is sensitive not only to the degree of entanglement of the initial state but also to the ratio between cavity-fiber coupling () and atom-cavity coupling (). This means that the entanglement dynamics can be controlled by choosing specific v and g.Comment: 14pages, 3figures, conferenc