共查询到20条相似文献,搜索用时 31 毫秒
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Luke M. Butcher 《Physics letters. A》2018,382(36):2555-2560
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《Nuclear Physics B》2006,732(3):444-462
In this paper we discuss representations of the Birman–Wenzl–Murakami algebra as well as of its dilute extension containing several free parameters. These representations are based on superalgebras and their baxterizations permit us to derive novel trigonometric solutions of the graded Yang–Baxter equation. In this way we obtain the multiparametric R-matrices associated to the , and quantum symmetries. Two other families of multiparametric R-matrices not predicted before within the context of quantum superalgebras are also presented. The latter systems are indeed non-trivial generalizations of the vertex model when both distinct edge variables statistics and extra free-parameters are admissible. 相似文献
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The structure of the joint phase diagram demonstrating high- superconductivity of copper oxides is studied on the basis of the theory of interaction-induced flat bands. Prerequisites for an associated topological rearrangement of the Landau state are established, and related non-Fermi-liquid (NFL) behavior of the normal states of cuprates is investigated. We focus on manifestations of this behavior in the electrical resistivity , especially the observed gradual crossover from normal-state T-linear behavior at doping x below the critical value of hole doping for termination of superconductivity, to T-quadratic behavior at , which is incompatible with predictions of the conventional quantum-critical-point scenario. It is demonstrated that the slope of the coefficient is universal, being the same on both boundaries of the joint phase diagram of cuprates, in agreement with available experimental data. 相似文献
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Stephan Narison 《Physics letters. [Part B]》2013,718(4-5):1321-1333
Using recent values of the QCD (non-)perturbative parameters given in Table 1 and an estimate of the N3LO QCD perturbative contributions based on the geometric growth of the PT series, we re-use QCD spectral sum rules (QSSR) known to N2LO PT series and including all dimension-six NP condensate contributions in the full QCD theory, for improving the existing estimates of and from the open charm and beauty systems. We especially study the effects of the subtraction point on “different QSSR data” and use (for the first time) the Renormalization Group Invariant (RGI) scale-independent quark masses in the analysis. The estimates [rigourous model-independent upper bounds within the SVZ framework] reported in Table 8: , and , , which improve previous QSSR estimates, are in perfect agreement (in values and precisions) with some of the experimental data on and on recent lattice simulations within dynamical quarks. These remarkable agreements confirm both the success of the QSSR semi-approximate approach based on the OPE in terms of the quark and gluon condensates and of the Minimal Duality Ansatz (MDA) for parametrizing the hadronic spectral function which we have tested from the complete data of the and ? systems. The values of the running quark masses and from are in good agreement though less accurate than the ones from recent and ? sum rules. 相似文献
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