Time-resolved charge fractionalization in inhomogeneous Luttinger liquids

The recent observation of charge fractionalization in single Tomanga-Luttinger liquids (TLLs) [Kamata et al., Nature Nanotech., 9 177 (2014)] opens new routes for a systematic investigation of this exotic quantum phenomenon. In this Letter we perform measurements on two adjacent TLLs and put forward an accurate theoretical framework to address the experiments. The theory is based on the plasmon scattering approach and can deal with injected charge pulses of arbitrary shape in TLL regions. We accurately reproduce and interpret the time-resolved multiple fractionalization events in both single and double TLLs. The effect of inter-correlations between the two TLLs is also discussed.Comment: 5 pages + Supplementary Material. To appear in Phys. Rev. B: Rapid. Com

IMPACT SIMULATION OF KICKING USING FLUID AND STRUCTURE INTERACTION ANALYSIS

INTRODUCTION Multi-Body System Analysis (Mechanical System Simulation), Finite Element Analysis(FEA), and Computational Fluid Dynamics Analysis are typical methods of computational human motion analysis. The purpose of this study is to create a impact model using fluid-strueture interaction technique in FEA, and analyze the impact process of kicking in football. METHODS Six university football players were chosen as the subjects. The experiment of ball-kicking was photographed using the high-speed camera (FASTCAM-ultima), which earl take 4,500 frames per second with 256 X 256 pixels, which was recorded on a VTR. Nine markers for digitizing were attached to the kicking leg of the subjects. The coordinate values were input in the computer by a video-position-analyzer. The ball model of this study is created using Euterian technology. The inside of the ball is defined by a air model which is called Gammer Law. The foot model of that is used Lagrangian technology. This study used explicit time integration codes (MSC/DYTRAN) of FEA. In this type of analysis, fluid forees from the Eulerian mesh load the foot model as the material in the Eulerian mesh flows around the foot. At the same time, the resulting deformation of the foot model influences subsequent fluid forces from the Eulerian mesh. RESULTS An example of a contour plot of pressure on the deformed shape is shown in Figure 1. The stress wave is propagated from the contact surface to the tibia, talus, and toe of the foot. At half impact, high intensity compressive stress is observed in the instep and a high intensity tensile stress is observed in the tibia. The first half of the horizontal velocity of the simulation data is similar to that of the experiment data, but the second half is not very similar to the experiment data. The contact time of the ball and foot of experiment data was 9 msec., that of all solid model was 5 msec., and that of fluid-structure interaction model was 8 msec.. CONCLUSION It is considered that the fluid-structure interaction model of this study will give better approximation to experiment data than the all solid model in kicking simulation using FEA. ....

Voltage-controlled Group Velocity of Edge Magnetoplasmon in the Quantum Hall Regime

We investigate the group velocity of edge magnetoplasmons (EMPs) in the quantum Hall regime by means of time-of-flight measurement. The EMPs are injected from an Ohmic contact by applying a voltage pulse, and detected at a quantum point contact by applying another voltage pulse to its gate. We find that the group velocity of the EMPs traveling along the edge channel defined by a metallic gate electrode strongly depends on the voltage applied to the gate. The observed variation of the velocity can be understood to reflect the degree of screening caused by the metallic gate, which damps the in-plane electric field and hence reduces the velocity. The degree of screening can be controlled by changing the distance between the gate and the edge channel with the gate voltage.Comment: 5 pages, 6 figures, to be published in Physical Review

Measurement of energy muons in EAS at energy region larger thean 10(17) eV

A measurement of low energy muons in extensive air showers (EAS) (threshold energies are 0.25, 0.5, 0.75 and 1.38 GeV) was carried out. The density under the concrete shielding equivalent to 0.25 GeV at core distance less than 500 m and 0.5 GeV less than 150 m suffers contamination of electromagnetic components. Therefore the thickness of concrete shielding for muon detectors for the giant air shower array is determined to be 0.5 GeV equivalence. Effects of photoproduced muons are found to be negligible in the examined ranges of shower sizes and core distances. The fluctuation of the muon density in 90 sq m is at most 25% between 200 m and 600 m from the core around 10 to the 17th power eV

EAS development curve at energy of 10(16) - 10(18) eV measured by optical Cerenkov light

The data of optical Cerenkov light from extensive air shower observed at the core distance more than 1 Km at Akeno are reexamined. Applying the new simulated results, the shower development curves for the individual events were constructed. For the showers of 10 to 17th power eV the average depth at the shower maximum is determined to be 660 + or - 40 gcm/2. The shower curve of average development is found to be well described by a Gaisser-Hillas shower development function with above shower maximum depth

Intraoperative Tissue Staining of Invaded Oral Carcinoma

PATHOLOGY & ONCOLOGY RESEARCH. 14(4):461-465 (2008)journal articl

Gamma rays of energy or = 10(15) eV from Cyg X-3

The experimental data of extensive air showers observed at Akeno have been analyzed to detect the gamma ray signal from Cyg X-3. After muon poor air showers are selected, the correlation of data acquisition time with 4.8 hours X-ray period is studied, giving the data concentration near the phase 0.6, the time of X-ray maximum. The probability that uniform backgrounds create the distribution is 0.2%. The time averaged integral gamma ray flux is estimated as (1.1 + or - 0.4)x 10 to the -14th power cm(-2) sec(-1) for Eo 10 to the 15th power eV and (8.8 + or - 5.0)x 10 to the 14th power cm(-2) sec(-1) for Eo 6 x 10 to the 14th power eV

Magnetic monopole search by 130 m(2)sr He gas proportional counter

A search experiment for cosmic ray magnetic monopoles was performed by means of atomic induction mechanism by using He mixture gas proportional counters of the calorimeter (130 square meters sr) at the center of the Akeno air shower array. In 3,482 hours operation no monopole candidate was observed. The upper limit of the monopole flux is 1.44 x 10 to the minus 13th power cm-z, sec -1, sr-1 (90% C.L.) for the velocity faster than 7 x 0.0001 c