A5073381604- Cold Atom Physics and Bose-Einstein Condensates
- Quantum, superfluid, helium dynamics
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Strong Light-Matter Interactions
- Advanced Thermodynamics and Statistical Mechanics
- Magnetic confinement fusion research
- Quantum Chromodynamics and Particle Interactions
- Analytical Chemistry and Sensors
- Supercapacitor Materials and Fabrication
- Diamond and Carbon-based Materials Research
- High-Energy Particle Collisions Research
- Particle physics theoretical and experimental studies
- Spectroscopy and Laser Applications
- Superconducting Materials and Applications
- Advanced Battery Technologies Research
- Advancements in Battery Materials
- Magnetism in coordination complexes
- Marine Sponges and Natural Products
- Plasma Diagnostics and Applications
- Nuclear physics research studies
- Advanced Proteomics Techniques and Applications
- Particle accelerators and beam dynamics
- Organic and Molecular Conductors Research
- Earthquake Detection and Analysis
Waseda University
2011-2024
Ehime University
2020-2024
Kyoto University
2007-2021
Mie University
2019-2021
Toyohashi University of Technology
2019
University of Michigan
2019
Dokkyo Medical University
2016
RIKEN Center for Computational Science
2012-2015
Tokuyama (Japan)
2008
Keio University
2007
QCD lattice simulations determine hadron masses as functions of the quark masses. From gradients these and using Feynman-Hellmann theorem sigma terms can then be determined. We use here a novel approach keeping singlet mass constant in our which upon an $SU(3)$ flavor symmetry breaking expansion gives highly constrained (i.e. few parameter) fits for multiplet. This is advantageous procedure determining gradient it avoids delicate chiral perturbation theory. illustrate by estimating light...
Charge detection biosensors have recently become the focal point of biosensor research, especially field-effect-transistors (FETs) that combine compactness, low cost, high input, and output impedances, to realize simple stable in vivo diagnostic systems. However, critical evaluation possibility limitations charge label-free DNA hybridization using silicon-based ion-sensitive FETs (ISFETs) has been introduced recently. The channel surface these devices must be covered by relatively thick...
A mesoporous PdCo sponge-like nanostructure was successfully synthesized by the combination of electrodeposition and dealloying, evaluated as a catalyst for oxygen reduction reaction fuel cells. The film had mesoporosity consisting 5–30 nm thick ligaments with pores tens nanometers. Its porosity estimated to be ca. 62%, suggesting that transport in smooth. resultant composition Pd93Co7, whose crystalline phase determined solid solution Pd92Co8 X-ray diffractometry. This degree alloying is...
The spin decomposition of the proton is a long-standing topic much interest in hadronic physics. Lattice QCD has had success calculating connected contributions to quark spin. However complete calculations, which necessarily involve gluonic and strange-quark contributions, still present some challenges. These ``disconnected'' typically small signals hidden against large statistical backgrounds rely on computationally intensive stochastic techniques. In this work we demonstrate how...
By introducing an additional operator into the action and using Feynman–Hellmann theorem we describe a method to determine both quark line connected disconnected terms of matrix elements. As illustration calculate gluon contribution (chromo-electric chromo-magnetic components) nucleon mass.
The enzyme sensors using electrolyte-solution-gate diamond field effect transistors (SGFETs) have been developed for the first time. hydrogen-terminated surface channel of FETs was modified into partially aminated and oxygen-terminated (H-A-O-terminated) with irradiation ultraviolet in an ammonia environment. pH response that is obtained about 50 mV/pH at 2–10. concentration substrates (urea or glucose) electrolyte solution has detected by change due to bio-catalyzed (urease glucose...
In order to prepare adequate current ramp-up and ramp-down scenarios for ITER, present experiments from various tokamaks have been analysed by means of integrated modelling in view determining relevant heat transport models these operation phases. A set empirical L-mode (namely, the Bohm–gyroBohm model scaling based with a specific fixed radial shape energy confinement time factors H96−L = 0.6 or HIPB98 0.4) has validated on multi-machine experimental dataset predicting li dynamics within...
We discuss advantages of surface confinement such as plasma stability, direct injection ion beams, electrostatic confinement, negligible synchrotron loss, and "geometric mirror." Preliminary experimental results are presented.
It is shown for the Bose-Einstein condensate of cold atomic system that new unperturbed Hamiltonian, which includes not only first and second powers zero mode operators but also higher ones, determines a unique stationary vacuum at temperature. From standpoint quantum field theory, it done in consistent manner canonical commutation relation operator kept. In this formulation, phase does diffuse robust against fluctuation mode. The standard deviation depends on condensed atom number with...
Significant advances have been made in the past decade field of mass spectrometry imaging (MS imaging). It is a relatively unestablished technique aimed at direct, high-sensitive and spatially exclusive detection biological molecules from surface tissue sections, so that semi-quantitative distribution map analyte can be reconstituted spectra obtained. There tremendous potential its application especially clinical field, such as biomarker discovery or pharmacokinetic study. However, vast...
The condition for the appearance of dynamical instability Bose-condensed system, characterized by emergence complex eigenvalues in Bogoliubov--de Gennes equations, is studied analytically. It concluded that degeneracy between a positive-norm eigenmode and negative-norm one essential modes. Based on conclusion, we justify two-mode approximation applied our previous work [E. Fukuyama et al., Phys. Rev. A 76, 043608 (2007)], which analytically existence modes when condensate has highly quantized vortex.
Umpolung reactions of N-trimethylsilyl α-iminoester with organometallics gave directly N-alkylaminoesters in high yields without the need for removing a protecting group at nitrogen atom. Efficient syntheses pyrrolidines, piperidines, and iminodiacetate derivatives were also developed via tandem N,N- or N,C-dialkylation utilizing characteristics silyl substituent. Furthermore, under influence silica gel, addition an enolate to imino proceeded give derivative.
An effective field theory of $\alpha$ cluster condensation is formulated as a spontaneously broken symmetry in quantum to understand the raison d'etre and nature Hoyle states $^{12}$C. The Nambu--Goldstone Higgs mode operators infinite systems are replaced with pair canonical whose Hamiltonian gives rise discrete energy addition Bogoliubov--de Gennes excited states. calculations reproduce well experimental spectrum existence Nambu--Goldstone--Higgs demonstrated crucial. $\gamma$ decay...
Ultracold Feshbach molecules are produced by magnetoassociation of fermionic Yb atoms in the ground state and an electronically excited, metastable state. A spin-orbit coupling is engineered for exploring a topological superfluidity demonstrated spin-momentum locking behavior at large Rabi frequency.
Palladium-catalyzed alkene difunctionalization reactions between alkenes bearing tethered aryl or alkenyl triflates and enolate nucleophiles are described. The transformations form two C–C bonds, a ring, up to stereocenters while producing substituted cyclopentane derivatives that contain appended carbonyl functionality. Products formed with >20:1 diastereoselectivity, the formation of sterically congested bonds quaternary carbon atoms is feasible.
Abstract The asymmetric total synthesis of (6S,7S,9R,10R)-6,9-epoxy-nonadec-18-ene-7,10-diol, which is a lipid diol component the brown alga, Notheia anomala, was performed via stereocontrolled LiAlH4 reduction cyclic hemiketal intermediate followed by stereospecific one-step cyclodehydration resulting anti 1,4-diol.
Two kinds of magnetohydrodynamics instability are observed in electron cyclotron heating and neutral beam injection-heated Heliotron J plasmas. One is the pressure-driven interchange modes with m = 2/n 1 5/n 3 low frequency (fexp < 20 kHz), which plasma a rational surface ι/2π 0.5 or 0.65. The other energetic ion-driven global Alfvén eigenmodes (GAEs) range. To identify GAEs, mode shear spectra calculated by CAS3D3 compared. bursting GAE intense magnetic fluctuations may affect bulk...
Bose-Einstein condensation of alpha clusters in light and medium-heavy nuclei is studied the frame field theoretical superfluid cluster model. The order parameter phase transition from Wigner to Nambu-Goldstone a amplitude, square moduli which density distribution. zero mode operators due spontaneous symmetry breaking global finite number are rigorously treated. theory systematically applied N from12C-52Fe at various rates. In 12C it found that energy levels gas-like well-developed states...