Teleportation Capability of Six-Qubit Cluster State

Recently Wei-Bo Gao et al. [Phys. Rev. Lett. 104 （2010） 020501]; reported on the creation of a 4-photon 6-qubit cluster state. It is shown this states can be utilized for perfect teleportation of arbitrary three qubit systems and controlled teleportation of an arbitrary two-qubit state. Therefore, the six-qubit cluster state as quantum channels is equivalent to that of maximally six-qubit entangled state.     

Synthesis,Characterization, and Magnetic Properties of the New Boride Solid Solutions M0.5Ru6.5B3 (M = Cr,Mn, Co,Ni)

Powder samples and single crystals of the borides M_0.5Ru_6.5B₃ (M = Cr, Mn, Co, Ni) were synthesized by arc‐melting the elements in a water‐cooled copper crucible under argon. The new phases were structurally characterized by single‐crystal and powder X‐ray diffraction as well as EDX‐Analyses. They crystallize in the hexagonal Th₇Fe₃ structure type (space group P6₃mc, no. 186, Z = 2) and a pronounced site preferential M/Ru substitution is observed. Magnetic properties of the compounds were investigated and Pauli paramagnetism was observed in all cases. However, a strong temperature dependency is subsequently observed in Mn_0.5Ru_6.5B₃ below 250 K, but no hint of magnetic ordering was found.     

Synthesis,Structure, and Properties of Scandium Dysprosium Antimonide ScDySb

Scandium dysprosium antimonide ScDySb was synthesized from scandium metal and DySb in an all‐solid state reaction at 1770 K. According to X‐ray analysis of the crystal structure [P4/nmm, Z = 4, a = 430.78(1) pm, c = 816.43(4) pm, R₁ = 0.0238, wR(all) = 0.0688, 268 independent reflections], ScDySb adopts the anti‐PbFCl type of structure, but with pronounced deviations in structural details, which are related to specific bonding interactions between the atoms involved. ScDySb shows antiferromagnetic ordering below 35.4 K, which was verified by susceptibility, heat capacity, and resistivity measurements. X‐ray structure determination, performed at 30 K, showed no significant structural changes to occur during the magnetic phase transition. The band structure was calculated in the framework of Density Functional Theory. The bonding properties are comparable to those of Sc₂Sb. Pronounced basins of the Electron Localization Function (ELF) appear in the tetragonal pyramidal Sc₄Dy voids.     

Living cationic polymerization of isobutyl vinyl ether using a variety of metal oxides as heterogeneous catalysts: Robust,reusable, and environmentally benign initiating systems

Cationic polymerization of isobutyl vinyl ether (IBVE) was examined using a variety of metal oxides in conjunction with IBVE–HCl adduct as a cationogen in toluene at 0 °C. Iron oxides (α‐Fe₂O₃, γ‐Fe₂O₃, and Fe₃O₄) induced living polymerization in the presence of an added base, ethyl acetate or 1,4‐dioxane, to give polymers with very narrow molecular weight distributions (MWDs). Conversely, with other metal oxides such as Ga₂O₃, In₂O₃, ZnO, Co₃O₄, and Bi₂O₃, polymers with bimodal MWDs, including long‐lived species along with uncontrolled higher molecular weight portions, were produced in the presence of an added base. A small amount of nBu₄NCl or 2,6‐di‐tert‐butylpyridine (DTBP) suppressed the uncontrolled portion to induce controlled reactions with Ga₂O₃, In₂O₃, and ZnO. The roles of these reagents are discussed in terms of the nature of the active sites of the catalyst surface and the polymerization mechanisms. In addition, the reusability of the catalyst, the effect of stirring before and during polymerization, and the estimation of the number of active sites are also described. © 2010 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 48: 916–926, 2010     

Univariate Geometric Stable Laws

The paper summarizes recent advances in the theory of geometric stable (GS) distributions. The results presented include parametrizations, characterizations, mixture representations, properties, asymptotic and convergent series expansions of densities and distribution functions, moments and tail behavior, simulation, and estimation.     

Thermochemistry of Binding of Lead(II) and Cadmium(II) by Saccharides in Aqueous Solution

Solution calorimetry was used to determine enthalpies and stability constants for binding of lead(II) or cadmium(II) by galacturonic acid and several monosaccharides in aqueous solution. New values for enthalpies of solution in water are reported for galacturonic acid and maltose monohydrate. The interaction of water solvent with the reactants is the largest factor in the binding process.     

A Highly Sensitive Kinetic Spectrophotometric System and Its Analytical Potential for Chromatographic Detection of Metal Ions

Micelles,microemulsions.vesicles,etc.,areorganicmicroheterogeneousmedia.Useofthesemediainanalyticalreactionsfordevelopingnewkinetic-baseddeterminationsorimprovingpreviouslyestablishedkineticmethodshasbeenreported"2.Inrecentyears,amixedmicellarmediumc...     

ML／Y分子筛复合材料的制备,表征及其催化性能研究

采用沸石合成法制备了ＭＬ／Ｙ（Ｍ＝ Ｆｅ，Ｃｏ，Ｃｒ；Ｌ＝ ８－ ｑｕｉｎｏｌｉｎｏｌａｎｄ ｓａｌｉｃｙｌｉｃ ａｃｉｄ （ｄｅｎｏｔｅｄ ａｓＱｘ ａｎｄ ＳＡｒｅｓｐｅｃｔｉｖｅｌｙ）） 复合材料，并通过ＸＲＤ、ＦＴＩＲ、ＩＣＰ、ＵＶ－ ｖｉｓ 及催化反应等手段对其进行了表征。ＦＴＩＲ和ＵＶ－ ｖｉｓ 测试结果表明： 合成体系中含有的金属配合物经过水热晶化后封装或固定在分子筛的空腔中。通过Ｘ射线衍射原位跟踪Ｙ型分子筛的晶化过程，发现合成体系中含有金属配合物的性质及其量的多少不仅对Ｙ型分子筛的晶化有很大影响，而且使其封装或固定在分子筛中的量也有所差异。另外，以环己烷氧化为探针反应考察了ＭＬ／Ｙ的催化性能，结果表明ＭＬ／Ｙ的氧化能力来自于所封装或固定的金属配合物，其氧化能力主要取决于配合物中心离子的性质