[en] Motivated by recent experiments (Claussen et al 2003 Preprint cond-mat/0302195) we investigate the magnetic-field dependence of the Josephson frequency of coherent atom-molecule oscillations near a Feshbach resonance. Far off resonance this frequency is determined by two-atom physics. However, the Josephson frequency is relatively large in this case and a description purely in terms of scattering lengths turns out to be inadequate. In particular, we have to include the effective range parameter of the interatomic interaction in our calculations. Close to resonance, the frequency deviates from the two-body results due to various many-body shifts. Considering also the many-body effects, we find perfect agreement with the experimental results over the entire range of magnetic field

[en] The uncertainties of background contributions to J = 0 partial wave πK scattering phase shifts are carefully studied. We firstly point out that the circular cuts exhibit different characters in S{1/2} and S{3/2} waves. While the former contributes negatively to the scattering length parameter, the latter contributes positively, i.e., has a wrong sign. This fact indicates that short range force contributions to the phase shift are non-negligible in the exotic channel. Nevertheless, it is verified that the κ pole will be affected only slightly with respect to the theoretical uncertainty in estimating the left hand cut contributions.

[en] Plasma based micro-nano ion beams have emerged as a useful tool in many research applications such as patterning, rapid fabrication, modification of surface properties, including fundamental research in optics and field emission of created nanostructures. The advantage of obtaining higher currents and variable projectile masses by employing different gaseous plasma ions in a newly developed system in our laboratory, have significantly expanded the applicability beyond conventional FIB systems. High aspect ratio microstructures (~100-1000) have been created employing 26 keV Ar, Kr and Ne ion beams, and the structuring capability have been evaluated with a new parameter – current normalized force. Capillary guiding of these beams has demonstrated self focusing whereby the beam size can be further reduced and guided. The effect of plasma and beam parameters on focal dimensions have revealed a unique feature of enhanced nonlinear demagnification when the plasma electrode aperture is reduced to below the Debye length. (author)

[en] Nano-technologies enable us to control quantum states. Vortex states in superconductor whose dimension is order of the coherence length would be applied in electronic devices in near future. In this presentation, we report the penetration process and dynamics of vortices in mesoscopic superconducting plate with anti-dot obtained by solving the time dependent Ginzburg-Landau (TDGL) equations. As to a regular square superconducting plate with an anti-dot located at the center, for suddenly applying the field perpendicular to the plate, vortices tend to penetrate into the plate from four central points of the each square side keeping the fourfold rotational symmetry. After the penetration, we found the vortex exclusion process that residual vortices for stability of the system are expelled. For introducing external current that breaks symmetry of the system

[en] We develop a time-dependent mean-field theory to investigate the released momentum distribution and the released energy of an ultracold Fermi gas in the BCS-BEC crossover after the scattering length has been set to zero by a fast magnetic-field ramp. For a homogeneous gas we analyze the nonequilibrium dynamics of the system as a function of the interaction strength and of the ramp speed. For a trapped gas the theoretical predictions are compared with experimental results

[en] Vertex detector cable requirements are considered within the context of the SiD concept. Cable material should be limited so that the number of radiation lengths represented is consistent with the material budget. In order to take advantage of the proposed accelerator beam structure and allow cooling by flow of dry gas, 'pulsed power' is assumed. Potential approaches to power distribution, cable paths, and cable design for operation in a 5 T magnetic field are described

[en] We derive the generalization of Wigner's causality bounds and Bethe's integral formula for the effective range parameter to arbitrary dimension and arbitrary angular momentum. We also discuss the impact of these constraints on the separation of low- and high-momentum scales and universality in low-energy scattering. Some of our results were summarized earlier in a letter publication. In this work, we present full derivations and several detailed examples.

[en] The precision requirements of the vertex detector at CLIC impose strong limitations on the mass of such a detector ( < 0.2% of a radiation length, X_o, per layer). To achieve such a low material budget, ultra-thin hybrid pixel detectors are foreseen, while the mass for cooling and services will be reduced by implementing a power-pulsing scheme that takes advantage of the low duty cycle of the accelerator. The principal aim is to achieve significant power reduction without compromising the power integrity supplied to the front-end electronics. A current based power-pulsing scheme is proposed and its electrical features are discussed on the basis of measurements

[en] The charge reduction effect, produced by the nonlinear Debye screening of high-Z charges occurring in strongly coupled plasmas, is investigated. An analytic asymptotic expression is obtained for the charge reduction factor (f_c) which determines the Debye-Hueckel potential generated by a charged test particle. Its relevant parametric dependencies are analysed and shown to predict a strong charge reduction effect in strongly coupled plasmas

[en] The performances of the ghost image and the visibility with partially coherent elliptical Gaussian Schell-model beams have been studied. In that case we have derived the condition under which the goal ghost image is achievable. Furthermore, the visibility is assessed in terms of the parameters related to the source to find that the visibility reduces with the increase of the beam size, while it is a monotonic increasing function of the transverse coherence length. More specifically, it is found that the inequalities of the source sizes in x and y directions, as well as the transverse coherence lengths, play an important role in the ghost image and the visibility. - Highlights: • We studied the ghost image and visibility with partially coherent EGSM beams. • We derived the condition under which the goal ghost image is achievable. • The visibility is assessed in terms of the parameters related to the source. • The source sizes and coherence lengths play role in the ghost image and visibility.