[en] Based on lattice QCD, we use the linear variational method to calculate the hadron spectrum and wave functions, our results are in reasonable agreement with experiment in the region of medium coupling constant

[en] A hyperfine interaction between copper's nuclei and spinon is proposed to account for the Nuclear Spin Relaxation 1/T₁, in the copper-oxygen plane. Based on the framework of Zou-Anderson's effective Hamiltonian, 1/T₁ of Cu is calculated and a possible explanation to the experimental results is presented

[en] This study concerns in the preparation of elastic polymer for bubble detector by free radical polymerization of acrymide. Optimized conditions were obtained on the basis of the study on the influences of concentrations of initiator and catalyzer on the induction period, reaction period and temperature peak of the response. The results indicate that the concentrations of initiator between 0.2% and 0.4% and the concentrations of catalyzer between 0.05% and 0.10% are proper. (authors)

[en] Band alignments of ZnO/CdSe nanocrystal quantum-dots (NQDs) heterojunctions are determined by ultraviolet photoelectron spectroscopy using synchrotron radiation source. To obtain ideal heterojunction interface, 1,2-ethanedithiol was used for CdSe NQDs as a ligand substitute. A type II band alignment of the ZnO/CdSe NQDs heterojunctions with changeable band offsets by varying the sizes of CdSe NQDs is concluded. The tunable band alignment of ZnO/CdSe NQDs heterojunctions is beneficial to the improvement of the design and fabrication of quantum-dot-sensitized solar cells.

[en] White-light emitting (WLE) CdSe quantum dots (QDs) capped with oleic acid (OA) were synthesized and the effects of thermal annealing and photoactivation on the small CdSe QDs in (polymethyl methacrylate) (PMMA) were investigated. A bimodal size-distribution phenomenon induced by annealing at temperatures of ∝200 C was observed. The phenomenon observed here is different from the result of large CdSe QDs with the similar treatment. The size-dependent property arises from the fact that smaller QDs have a higher surface energy than larger ones. Annealing-induced bimodal size distribution results in a luminescence change of small CdSe QDs. (copyright 2013 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim)

[en] We propose an efficient scheme to implement high-fidelity multi-particle entangled states in the system consisting of superconducting charge qubits coupled through a single cavity mode. The manipulation is simply to apply specific gate voltages and external magnetic fields threaded through SQUIDs for fixed time. The total number of qubits which can be entangled is limited only from the decoherence time achieved in experiments. The gate operations are based on unconventional geometric phases and thus have built-in fault-tolerant features. The produced multi-qubit entangled states may have many applications

[en]  and the pion mass are obtained in the large N limit by rigorously enumerating the tree diagrams in a regular lattice with arbitrary dimensionality. (orig.)

[en] High energy heavy ions generate potential tracks on the face of insulated material, and a porous surface with gradient refractive index can be formed by etching the ion tracks. Here, a simple geometrical model for simulating the porous surface is proposed which can calculate the refractive index with the effective medium theories. (authors)

[en] Triple-band terahertz metamaterial absorber with near 100% absorption is suggested in this paper. It is designed by two different lengths of Au bars and an Au substrate separated by an ultra-thin thickness of dielectric spacer. Three separated resonance absorption peaks (labeled A, B, and C) with narrow bandwidths and high absorption rates are realized. The first two peaks A and B are ascribed to the fundamental modes of the two Au bars, respectively, whereas the excitation of 3-order response in the longer Au bar results in the peak C. The field distributions of peaks A, B, and C are provided to verify their mechanisms. Independent frequency modulation of the three peaks (with slight change of absorption strength) can also be achieved, which is different from previous works that changes in parameters affect all absorption peaks. Further structure optimization allows for more absorption peaks, such as quad-band or penta-band. These suggested light absorbers could be designed for potential applications in terahertz technology related fields. (paper)

[en] In this paper, we report that an electromotive force (EMF) can be induced in a rope of aligned single-walled carbon nanotubes (SWNTs) when water droplets fall on this rope. The magnitude of this EMF depends sensitively on the slant angle of the SWNTs. Most interestingly, both the magnitude and the direction of the induced EFM can be modulated by applying a current to the SWNTs. The concepts of electrical slip and no-slip are proposed and can be quantitatively described by “electrical slip resistance^. This kind of generator does not need any magnet, rotor, etc and shows quite a different operating mechanism and design compared with a conventional large scale hydroelectric power generator. (condensed matter: structure, thermal and mechanical properties)