Results for "S. Hashimoto"

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Self-triggered Model Predictive Control for Continuous-Time Systems: A Multiple Discretizations ApproachSep 08 2016In this paper, we propose a new self-triggered formulation of Model Predictive Control for continuous-time linear networked control systems. Our control approach, which aims at reducing the number of transmitting control samples to the plant, is derived ... More
Nucleon axial and tensor charges with dynamical overlap quarksNov 14 2015We report on our calculation of the nucleon axial and tensor charges in 2+1-flavor QCD with dynamical overlap quarks. Gauge ensembles are generated at a single lattice spacing 0.12 fm and at a strange quark mass close to its physical value. We employ ... More
Metric recovery from directed unweighted graphsNov 20 2014We analyze directed, unweighted graphs obtained from $x_i\in \mathbb{R}^d$ by connecting vertex $i$ to $j$ iff $|x_i - x_j| < \epsilon(x_i)$. Examples of such graphs include $k$-nearest neighbor graphs, where $\epsilon(x_i)$ varies from point to point, ... More
Convergence rate of stability problems of SDEs with (dis-)continuous coefficientsJan 18 2014Apr 02 2014We consider the stability problems of one dimensional SDEs when the diffusion coefficients satisfy the so called Nakao-Le Gall condition. The explicit rate of convergence of the stability problems are given by the Yamada-Watanabe method without the drifts. ... More
$(\mathfrak{g},K)$-module of $\mathrm{O}(p,q)$ associated with the finite-dimensional representation of $\mathfrak{sl}_2$Jan 31 2018The main aim of this paper is to construct irreducible $(\mathfrak{g},K)$-modules of $\mathrm{O}(p,q)$ corresponding to the finite-dimensional representation of $\mathfrak{sl}_2$ of dimension $m+1$ under the Howe duality, to find the $K$-type formula, ... More
Moduli of surface diffeomorphisms with cubic tangenciesApr 23 2018In this paper, we study conjugacy invariants for 2-dimensional diffeomorphisms with homoclinic cubic tangencies (two-sided tangencies of the lowest order) under certain open conditions. Ordinary arguments used in past studies of conjugacy invariants associated ... More
Asymptotic formulas for partial sums of class numbers of indefinite binary quadratic formsJul 01 2008Feb 09 2015Sarnak obtained the asymptotic formula of the sum of the class numbers of indefinite binary quadratic forms from the prime geodesic theorem for the modular group. In the present paper, we show several asymptotic formulas of partial sums of the class numbers ... More
Asymptotic formulas for class number sums of indefinite binary quadratic forms in arithmetic progressionsMar 19 2010Sep 06 2010It is known that there is a one-to-one correspondence between equivalence classes of primitive indefinite binary quadratic forms and primitive hyperbolic conjugacy classes of the modular group. Due to such a correspondence, Sarnak obtained the asymptotic ... More
Canonical and $n$-canonical modules on a Noetherian algebraAug 30 2015We define canonical and $n$-canonical modules on a module-finite algebra over a Noether commutative ring and study their basic properties. Using $n$-canonical modules, we generalize a theorem on $(n,C)$-syzygy by Araya and Iima which generalize a well-known ... More
Prime and zero distributions for meromorphic Euler productsOct 16 2007Apr 04 2008The aim of the present paper is to study the relations between the prime distribution and the zero distribution for generalized zeta functions which are expressed by Euler products and is analytically continued as meromorphic functions of finite order. ... More
Finite Symplectic Actions on the K3 LatticeDec 13 2010Feb 07 2013In this paper, we study finite symplectic actions on K3 surfaces X, i.e. actions of finite groups G on X which act on H^{2,0}(X) trivially. We show that the action on the K3 lattice H^2(X,Z) induced by a symplectic action of G on X depends only on G up ... More
Higher-dimensional absolute versions of symmetric, Frobenius, and quasi-Frobenius algebrasSep 24 2016In this paper, we define and discuss higher-dimensional and absolute versions of symmetric, Frobenius, and quasi-Frobenius algebras. In particular, we compare these with the relative notions defined by Scheja and Storch. We also prove the validity of ... More
Partial zeta functionsAug 09 2006In the present manuscript, we study analytic properties of zeta functions defined by partial Euler products.
Overlap/Domain-wall reweightingNov 19 2013We investigate the eigenvalues of nearly chiral lattice Dirac operators constructed with five-dimensional implementations. Allowing small violation of the Ginsparg-Wilson relation, the HMC simulation is made much faster while the eigenvalues are not significantly ... More
Evidence of effective axial U(1) symmetry restoration at high temperature QCDDec 06 2016We study the axial U(1) symmetry at finite temperature in two-flavor lattice QCD. Employing the Mobius domain-wall fermions, we generate gauge configurations slightly above the critical temperature Tc with different lattice sizes L = 2-4 fm. Our action ... More
Growth fluctuation in preferential attachment dynamicsSep 18 2015Sep 29 2015In the Yule-Simon process, selection of words follows the preferential attachment mechanism, resulting in the power-law growth in the cumulative number of individual word occurrences. This is derived using mean-field approximation, assuming a continuum ... More
Selberg's zeta functions for congruence subgroups of modular groups in SL(2,R) and SL(2,C)Jun 30 2008Feb 09 2015It is known that the Selberg zeta function for the modular group has an expression in terms of the class numbers and the fundamental units of the indefinite binary quadratic forms. In the present paper, we generalize such a expression to any congruence ... More
"Geometric quotients are algebraic schemes" based on Fogarty's ideaMar 12 2003Sep 13 2004Let S be a Noetherian scheme, f:X->Y a surjective S-morphism of S-schemes, with X of finite type over S. We discuss what makes Y of finite type. First, we prove that if S is excellent, Y is reduced, and f is universally open, then Y is of finite type. ... More
Dynamic nuclear polarization and Knight shift measurements in a breakdown regime of integer quantum Hall effectNov 21 2007Nuclear spins are polarized electrically in a breakdown regime of an odd-integer quantum Hall effect (QHE). Electron excitation to the upper Landau subband with the opposite spin polarity flips nuclear spins through the hyperfine interaction. The polarized ... More
O(a^2) improvement of the overlap-Dirac operatorDec 21 2009We construct an $O(a^2)$-improved overlap-Dirac operator by designing an improved overlap kernel, based on the Symanzik improvement program. Field rotation terms are also identified to improve off-shell amplitudes for both massless and massive fermions. ... More
Lattice Heavy Quark Effective Theory and the Isgur-Wise functionNov 28 1995We compute the Isgur-Wise function using heavy quark effective theory formulated on the lattice. The non-relativistic kinetic energy term of the heavy quark is included to the action as well as terms remaining in the infinite quark mass limit. The classical ... More
Inelastic Collisions in Optically Trapped Ultracold Metastable YtterbiumFeb 04 2008We report measurement of inelastic loss in dense and cold metastable ytterbium (Yb[$^3P_2$]). Use of an optical far-off-resonance trap enables us to trap atoms in all magnetic sublevels, removing multichannel collisional trap loss from the system. Trapped ... More
Ubiquitous antinodal quasiparticles and deviation from simple d-wave form in underdoped Bi-2212May 20 2014The momentum dependence of the superconducting gap in the cuprates has been debated, with most experiments reporting a deviation from a simple $d_{x^2-y^2}$ form in the underdoped regime and a few experiments claiming that a simple $d_{x^2-y^2}$ form ... More
Ubiquitous antinodal quasiparticles and deviation from simple d-wave form in underdoped Bi-2212May 20 2014Aug 01 2017The momentum dependence of the superconducting gap in the cuprates has been debated, with most experiments reporting a deviation from a simple $d_{x^2-y^2}$ form in the underdoped regime and a few experiments claiming that a simple $d_{x^2-y^2}$ form ... More
Symmetries of spatial meson correlators in high temperature QCDFeb 08 2019Based on a complete set of $J = 0$ and $J=1$ spatial isovector correlation functions calculated with $N_F = 2$ domain wall fermions we identify an intermediate temperature regime of $T \sim 250 - 550$ MeV where chiral symmetry is restored but the correlators ... More
Determination of the chiral condensate from QCD Dirac spectrum on the latticeDec 18 2010Mar 01 2011We calculate the chiral condensate of QCD with 2, 2+1 and 3 flavors of sea quarks. Lattice QCD simulations are performed employing dynamical overlap fermions with up and down quark masses covering a range between 3 and 100 MeV. On L ~ 1.8-1.9 fm lattices ... More
Topological susceptibility in (2+1)-flavor lattice QCD with overlap fermionOct 01 2008Nov 24 2008We determine the topological susceptibility \chi_t in the topologically-trivial sector generated by lattice simulations of N_f = 2+1 QCD with overlap Dirac fermion, on a 16^3 x 48 lattice with lattice spacing ~ 0.11 fm, for five sea quark masses m_q ranging ... More
Exact absorption probabilities for the D3-braneMay 21 1998Jul 29 1999We consider a minimal scalar in the presence of a three-brane in ten dimensions. The linearized equation of motion, which is just the wave equation in the three-brane metric, can be solved in terms of associated Mathieu functions. An exact expression ... More
Universality in Chaos of Particle Motion near Black Hole HorizonOct 19 2016Motion of a particle near a horizon of a spherically symmetric black hole is shown to possess a universal Lyapunov exponent of a chaos provided by its surface gravity. To probe the horizon, we introduce electromagnetic or scalar force to the particle ... More
Calabi-Yau threefolds of type K (I): ClassificationSep 26 2014Feb 04 2016Any Calabi-Yau threefold X with infinite fundamental group admits an \'etale Galois covering either by an abelian threefold or by the product of a K3 surface and an elliptic curve. We call X of type A in the former case and of type K in the latter case. ... More
Test of factorization for the long-distance effects from charmonium on $B\to K\ell^+\ell^-$Jan 25 2019We report on a calculation of the charmonium contribution to the decay $B \rightarrow K\ell^+\ell^-$ using lattice simulations with 2+1 flavors of Mobius domain wall fermions. We focus on the region of $q^2$ below the $J/\psi$ resonance and test the factorization ... More
About J-flow, J-balanced metrics, uniform J-stability and K-stabilityMay 04 2017Jul 04 2017From the work of Dervan-Keller, there exists a quantization of the critical equation for the J-flow. This leads to the notion of J-balanced metrics. We prove that the existence of J-balanced metrics has a purely algebro-geometric characterization in terms ... More
The Environment of ``E+A'' GalaxiesDec 11 1995The violent star formation history of ``E+A'' galaxies and their detection almost exclusively in distant clusters is frequently used to link them to the ``Butcher-Oemler effect'' and to argue that cluster environment influences galaxy evolution. From ... More
Anisotropic lattice actions for heavy quarkFeb 20 2003The anisotropic lattice fermion actions are investigated with the one-loop perturbative calculations aiming at constructing a formulation for heavy quark with controlled systematic uncertainties. For the heavy-light systems at rest the anisotropic lattice ... More
A numerical method of solving time-dependent Hartree-Fock-Bogoliubov equation with Gogny interactionJul 20 2007A numerical method to solve time-dependent Hartree-Fock-Bogoliubov equation is proposed to treat the case with Gogny effective interaction. To check the feasibility of the method, it is applied to oxygen isotope O20 and small amplitude oscillations are ... More
$G$-prime and $G$-primary $G$-ideals on $G$-schemesJun 08 2009Sep 29 2014Let $G$ be a flat finite-type group scheme over a scheme $S$, and $X$ a noetherian $S$-scheme on which $G$-acts. We define and study $G$-prime and $G$-primary $G$-ideals on $X$ and study their basic properties. In particular, we prove the existence of ... More
Calabi-Yau threefolds of type K (II): Mirror symmetryNov 27 2015Jun 20 2016A Calabi-Yau threefold is called of type K if it admits an \'etale Galois covering by the product of a K3 surface and an elliptic curve. In our previous paper, based on Oguiso-Sakurai's fundamental work, we provide the full classification of Calabi-Yau ... More
Period map of a certain K3 family with an S5-actionApr 01 2009In this paper, we study the period map of a certain one-parameter family of quartic K3 surfaces with an S5-action. We construct automorphic forms on the period domain as the pull-backs of theta constants of genus 2 by a modular embedding. Using these ... More
Pion form factors from two-flavor lattice QCD with exact chiral symmetryMay 15 2009Oct 23 2009We calculate pion vector and scalar form factors in two-flavor lattice QCD and study the chiral behavior of the vector and scalar radii <r^2>_{V,S}. Numerical simulations are carried out on a 16^3 x 32 lattice at a lattice spacing of 0.12 fm with quark ... More
Light meson spectrum with $N_f=2+1$ dynamical overlap fermionsOct 08 2008We report on a numerical simulation with 2+1 dynamical flavors of overlap fermions. We calculate pseudo-scalar masses and decay constants on a $16^3\times 48 \times (0.11 {\rm fm})^4$ lattice at five different up and down quark masses and two strange ... More
Topological susceptibility in two-flavor lattice QCD with exact chiral symmetryOct 05 2007Jun 11 2008We determine the topological susceptibility $\chi_t$ in two-flavor QCD using the lattice simulations at a fixed topological sector. The topological charge density is unambiguously defined on the lattice using the overlap-Dirac operator which possesses ... More
Upper critical fields and critical current density of BaFe2(As0.68P0.32)2 single crystalAug 23 2009May 30 2010The transport properties, upper critical fields, superconducting anisotropy, and critical current density in an iso-valent phosphorus-doped BaFe2As2 single crystal close to optimum doping are investigated in this report. Temperature dependent resistivity ... More
Two-flavor lattice QCD in the epsilon-regime and chiral Random Matrix TheoryMay 23 2007Oct 28 2007The low-lying eigenvalue spectrum of the QCD Dirac operator in the epsilon-regime is expected to match with that of chiral Random Matrix Theory (ChRMT). We study this correspondence for the case including sea quarks by performing two-flavor QCD simulations ... More
Lattice study of vacuum polarization function and determination of strong coupling constantJul 03 2008May 07 2009We calculate the vacuum polarization functions on the lattice using the overlap fermion formulation.By matching the lattice data at large momentum scales with the perturbative expansion supplemented by Operator Product Expansion (OPE), we extract the ... More
Initial Shock Waves for Explosive Nucleosynthesis in Type II SupernovaJul 02 1998We have performed 1-dimensional calculations for explosive nucleosynthesis in collapse-driven supernova and investigated its sensitivity to the initial form of the shock wave. We have found the tendency that the peak temperature becomes higher around ... More
Chiral properties of light mesons with $N_f=2+1$ overlap fermionsOct 29 2009We present an update of the light meson spectrum with $N_f$=2+1 overlap fermions on a $16^3\times 48$ lattice at five different up and down quark masses and two strange quark masses. Based on our experience with the previous simulation with $N_f=2$, we ... More
Pion vector and scalar form factors with dynamical overlap quarksOct 15 2008Oct 22 2008We calculate the pion vector and scalar form factors in two-flavor QCD. Gauge configurations are generated with dynamical overlap quarks on a 16^3 x 32 lattice at a lattice spacing of 0.12 fm with sea quark masses down to a sixth of the physical strange ... More
Topological susceptibility in 2-flavor lattice QCD with fixed topologyJun 11 2008We determine the topological susceptibility $ \chi_t $ in the trivial topological sector generated by lattice simulations of two-flavor QCD with overlap Dirac fermion, on a $16^3 \times 32$ lattice with lattice spacing $\sim$ 0.12 fm, at six sea quark ... More
Dynamical CP Violation in Composite Higgs ModelsDec 28 1992The dynamical origin of the CP violation in electroweak theory is investigated in composite Higgs models. The mechanism of the spontaneous CP violation proposed in other context by Dashen is adopted to construct simple models of the dynamical CP violation. ... More
Detailed band structure of twinned and detwinned BaFe$_2$As$_2$ studied with angle-resolved photoemission spectroscopyJan 10 2019We study the band structure of twinned and detwinned BaFe$_2$As$_2$ using angle-resolved photoemission spectroscopy (ARPES). The combination of measurements in the ordered and normal state along four high-symmetry momentum directions $\Gamma$/Z--X/Y enables ... More
Nucleon sigma term and strange quark content from lattice QCD with exact chiral symmetryJun 29 2008Aug 21 2008We calculate the nucleon sigma term in two-flavor lattice QCD utilizing the Feynman-Hellman theorem. Both sea and valence quarks are described by the overlap fermion formulation, which preserves exact chiral and flavor symmetries on the lattice. We analyse ... More
Dispersion of Inferred SNe Ia/SNe II Ratios for Current Models of Supernova NucleosynthesisJul 02 1998We have estimated the dispersion of the inferred relative frequencies of Type-Ia and Type- II supernovae ($N_{Ia}/ N_{II}$) in our Galaxy by fitting the numerical results of supernova nucleosynthesis to the solar-system abundances. The ratio $N_{Ia}/ ... More
Common origin of the pseudogap in electron-doped and hole-doped cuprates governed by Mott physicsJan 12 2018The pseudogap phenomena have been a long-standing mystery of the cuprate high-temperature superconductors. Unlike the pseudogap in hole-doped cuprates, however, the pseudogap in the electron-doped counterpart has been attributed to band folding due to ... More
Duality Cascade and Oblique Phases in Non-Commutative Open String TheoryJul 24 2001Aug 07 2001We investigate the complete phase diagram of the decoupled world-sheet theory of (P,Q) strings. These theories include 1+1 dimensional super Yang-Mills theory and non-commutative open string theory. We find that the system exhibits a rich fractal phase ... More
Inequivalence of Single-Particle and Population Lifetimes in a Cuprate SuperconductorMay 27 2015We study optimally doped Bi-2212 ($T_\textrm{c}=96$~K) using femtosecond time- and angle-resolved photoelectron spectroscopy. Energy-resolved population lifetimes are extracted and compared with single-particle lifetimes measured by equilibrium photoemission. ... More
Nucleosynthesis in ONeMg Novae: Models versus Observations to Constrain the Masses of ONeMg White Dwarfs and Their EnvelopesMay 21 1999Nucleosynthesis in ONeMg novae has been investigated with the wide ranges of three parameters, i.e., the white dwarf mass, the envelope mass at ignition, and the initial composition. A quasi-analytic one-zone approach is used with an up-to-date nuclear ... More
Cyclotron Resonance in the Hidden-Order Phase of URu2Si2Jul 17 2012We report the first observation of cyclotron resonance in the hidden-order phase of ultra-clean URu$_2$Si$_2$ crystals, which allows the full determination of angle-dependent electron-mass structure of the main Fermi-surface sheets. We find an anomalous ... More
High-dispersion spectroscopic monitoring of the Be/X-ray binary A0535+26/V725 Tau I: The long-term profile variabilityFeb 10 2010Feb 11 2010We report on optical high-dispersion spectroscopic monitoring observations of the Be/X-ray binary A0535+26/V725 Tau, carried out from November 2005 to March 2009. The main aim of these monitoring observations is to study spectral variabilities in the ... More
Nucleon decay matrix elements with the Wilson quark action: an updateOct 04 1999We present preliminary results of a new lattice computation of hadronic matrix elements of baryon number violating operators which appear in the low-energy effective Lagrangian of (SUSY-)Grand Unified Theories. The contribution of irrelevant form factor ... More
Hadron matrix elements for nucleon decay with the Wilson quark actionSep 20 1998We report preliminary results of our study of matrix elements of baryon number violating operators which appear in the low-energy effective Lagrangian of (SUSY-)Grand Unified Theories. The calculation is performed on a $32^{3}\times80$ lattice at $\beta=6.1$ ... More
Strongly three-dimensional electronic structure and Fermi Surfaces of SrFe$_{2}$(As$_{0.65}$P$_{0.35}$)$_{2}$: Comparison with BaFe$_{2}$(As$_{1-x}$P$_{x}$)$_{2}$Dec 17 2013May 15 2014The isovalent-substituted iron-pnictide superconductor SrFe$_{2}$(As$_{1-x}$P$_{x}$)$_{2}$ ($x$=0.35) has a slightly higher optimum critical temperature than the similar system BaFe$_{2}$(As$_{1-x}$P$_{x}$)$_{2}$, and its parent compound SrFe$_{2}$As$_{2}$ ... More
A confirmative spin-parity assignment for the key 6.15 MeV state in $^{18}$Ne of astrophysical importanceJun 17 2013Proton resonant states in $^{18}$Ne have been investigated by the resonant elastic scattering of $^{17}$F+$p$. The $^{17}$F beam was separated by the CNS radioactive ion beam separator (CRIB), and bombarded a thick H$_2$ gas target at 3.6 MeV/nucleon. ... More
Heavy Element Production in Inhomogeneous Big Bang NucleosynthesisJul 19 2005Dec 13 2005We present a new astrophysical site of the big bang nucleosynthesis (BBN) that are very peculiar compared with the standard BBN. Some models of the baryogenesis suggest that very high baryon density regions were formed in the early universe. On the other ... More
30S(alpha,p) in X-Ray Bursts at CRIBOct 24 2010Over the past three years, we have worked on developing a well-characterized 30S radioactive beam to be used in a future experiment aiming to directly measure the 30S(alpha,p) stellar reaction rate within the Gamow window of Type I X-ray bursts.
First direct measurement of the $^{11}$C($α$, p)$^{14}$N stellar reaction by an extended thick-target methodSep 26 2016The $^{11}$C($\alpha$, p) reaction is an important $\alpha$-induced reaction competing with $\beta$-limited hydrogen-burning processes in high-temperature explosive stars. We directly measured its reaction cross sections both for the ground-state transition ... More
Fermi surface reconstruction in electron-doped cuprates without antiferromagnetic long-range orderNov 12 2018Fermi surface (FS) topology is a fundamental property of metals and superconductors. In electron-doped cuprate Nd2-xCexCuO4 (NCCO), an unexpected FS reconstruction has been observed in optimal- and over-doped regime (x=0.15-0.17) by quantum oscillation ... More
3D nature of ZrTe$_5$ band structure measured by high-momentum-resolution photoemission spectroscopyApr 18 2017We have performed a systematic high-momentum-resolution photoemission study on ZrTe$_5$ using $6$ eV photon energy. We have measured the band structure near the $\Gamma$ point, and quantified the gap between the conduction and valence band as $18 \leq ... More
Revealing the Coulomb interaction strength in a cuprate superconductorDec 09 2017We study optimally doped Bi$_{2}$Sr$_{2}$Ca$_{0.92}$Y$_{0.08}$Cu$_{2}$O$_{8+\delta}$ (Bi2212) using angle-resolved two-photon photoemission spectroscopy. Three spectral features are resolved near 1.5, 2.7, and 3.6 eV above the Fermi level. By tuning the ... More
Se content $x$ dependence of electron correlation strength in Fe$_{1+y}$Te$_{1-x}$Se$_{x}$May 28 2015The iron chalcogenide Fe$_{1+y}$Te$_{1-x}$Se$_{x}$ on the Te-rich side is known to exhibit the strongest electron correlations among the Fe-based superconductors, and is non-superconducting for $x$ < 0.1. In order to understand the origin of such behaviors, ... More
Convergence of the chiral expansion in two-flavor lattice QCDJun 05 2008Oct 27 2008We test the convergence property of the chiral perturbation theory (ChPT) using a lattice QCD calculation of pion mass and decay constant with two dynamical quark flavors. The lattice calculation is performed using the overlap fermion formulation, which ... More
New Approach for Evaluating Incomplete and Complete Fusion Cross Sections with Continuum-Discretized Coupled-Channels MethodAug 27 2009We propose a new method for evaluating incomplete and complete fusion cross sections separately using the Continuum-Discretized Coupled-Channels method. This method is applied to analysis of the deuteron induced reaction on a 7Li target up to 50 MeV of ... More
Crystallization and vitrification of electrons in a glass-forming charge liquidDec 06 2016Charge ordering (CO) is a phenomenon in which electrons in solids crystallize into a periodic pattern of charge-rich and charge-poor sites owing to strong electron correlations, mostly resulting in long-range order. Recently, however, in geometrically-frustrated ... More
Observational constraints on a decaying cosmological termNov 08 2006Mar 12 2007We investigate the evolution of a universe with a decaying cosmological term (vacuum energy) that is assumed to be a function of the scale factor. In this model, while the cosmological term increases to the early universe, the radiation energy density ... More
Unambiguous pure state identification without classical knowledgeOct 03 2005Jan 13 2006We study how to unambiguously identify a given quantum pure state with one of the two reference pure states when no classical knowledge on the reference states is given but a certain number of copies of each reference quantum state are presented. By the ... More
Can the Wigner function be determined by properties for translation and parity transformation on lattice phase space?Aug 07 2002We show that the Fano operator for one dimensional quantum system is uniquely determined by assuming the reasonable behavior under translation and parity transformation on phase space. Contrarily, for the system with lattice phase space the same procedure ... More
Quantum pure-state identificationJul 25 2005Oct 27 2005We address a problem of identifying a given pure state with one of two reference pure states, when no classical knowledge on the reference states is given, but a certain number of copies of them are available. We assume the input state is guaranteed to ... More
Extended Quantum Color CodingSep 26 2004The quantum color coding scheme proposed by Korff and Kempe (quant-ph/0405086) is easily extended so that the color coding quantum system is allowed to be entangled with an extra auxiliary quantum system. It is shown that in the extended scheme we need ... More
Photospheric carbon and oxygen abundances of F-G type stars in the Pleiades clusterOct 18 2016In order to investigate the carbon-to-oxygen ratio of the young open cluster M45 (Pleiades), the C and O abundances of selected 32 F-G type dwarfs (in the effective temperature range of Teff~5800-7600~K and projected rotational velocity range of vesini~10-110~km/s) ... More
QCD String as Vortex String in Seiberg-Dual TheoryJun 14 2007We construct a classical vortex string solution in a Seiberg-dual theory of N=1 supersymmetric SO(N_c) QCD which flows to a confining phase. We claim that this vortex string is a QCD string, as previouly argued by M.Strassler. In SO(N_c) QCD, it is known ... More
Solitons in Supersymmety Breaking Meta-Stable VacuaOct 03 2006Mar 12 2007In recently found supersymmetry-breaking meta-stable vacua of the supersymmetric QCD, we examine possible exsitence of solitons. Homotopy groups of the moduli space of the meta-stable vacua show that there is no nontrivial soliton for SU(N_c) gauge group. ... More
Glueball Decay in Holographic QCDSep 14 2007Oct 13 2007Using holographic QCD based on D4-branes and D8-anti-D8-branes, we have computed couplings of glueballs to light mesons. We describe glueball decay by explicitly calculating its decay widths and branching ratios. Interestingly, while glueballs remain ... More
The socle filtrations of principal series representations of $SL(3,\mathbb{R})$ and $Sp(2,\mathbb{R})$Feb 20 2017We study the structure of the $(\mathfrak{g},K)$-modules of the principal series representations of $SL(3,\mathbb{R})$ and $Sp(2,\mathbb{R})$ induced from minimal parabolic subgroups, in the case when the infinitesimal character is nonsingular. The composition ... More
Two-photon decay of $π^0$ from two-flavor lattice QCDFeb 27 2011Apr 02 2011We study the correction to the radiative $\pi^0$ decay width due to finite light quark mass. Using lattice QCD with the overlap fermion formulation, we calculate the three-point function of the form $<PV_\mu V_\nu>$ in the (Euclidean) momentum space, ... More
$π^0$ to two-photon decay in lattice QCDDec 02 2009We calculate the neutral pion ($\pi^0$) to off-shell two photon ($\gamma^*\gamma^*$) transition form factor in lattice QCD. The transition form factor can be extracted from the three-point function of the form (axial-vector)-(vector)-(vector) as a function ... More
Ultrahigh-Field Hole Cyclotron Resonance Absorption in InMnAs FilmsApr 27 2004We have carried out an ultrahigh-field cyclotron resonance study of p-type In1-xMnxAs films, with Mn composition x ranging from 0% to 2.5%, grown on GaAs by low-temperature molecular-beam epitaxy. Pulsed magnetic fields up to 500 T were used to make cyclotron ... More
Parameter dependence of the topology change and the scaling properties of the topology conserving gauge actionSep 30 2005Nov 10 2005The topology conserving gauge action proposed by Luescher is expected to reduce the number of non-smooth gauge configurations as well as the topology change compared to the conventional actions for the same lattice spacings. We report our quenched QCD ... More
Nucleosynthesis inside Gamma-Ray Burst Accretion DisksMay 26 2004We investigate nucleosynthesis inside both a gamma-ray burst accretion disk and a wind launched from an inner region of the disk using one-dimensional models of the disk and wind and a nuclear reaction network. Far from a central black hole, the composition ... More
Scalar Absorption and the Breaking of the World Volume Conformal InvarianceMar 03 1998Mar 17 1998We investigate a version of fixed scalars for non-dilatonic branes which correspond to dilatations of the brane world-volume. We obtain a cross-section whose world-volume interpretation falls out naturally from an investigation of the breaking of conformal ... More
Stochastic calculation of the QCD Dirac operator spectrum with Mobius domain-wall fermionJan 05 2016We calculate the spectral function of the QCD Dirac operator using the four-dimensional effective operator constructed from the Mobius domain-wall implementation. We utilize the eigenvalue filtering technique combined with the stochastic estimate of the ... More
Word, graph and manifold embedding from Markov processesSep 18 2015Continuous vector representations of words and objects appear to carry surprisingly rich semantic content. In this paper, we advance both the conceptual and theoretical understanding of word embeddings in three ways. First, we ground embeddings in semantic ... More
A breakthrough toward wafer-size epitaxial graphene transferMay 26 2010The formation of graphene on any desirable substrate is extremely essential for the successful replacement of Si with graphene in all technological applications in the beyond-CMOS era. Recently, we observed that a Ti layer formed on epitaxial graphene ... More
Chemical Control of Spin Chirality in $(Nd_{1-x} Dy_x)_2 Mo_2 O_7$Feb 20 2004Magnetization and Hall resistivity have been investigated for single crystals of Dy-doped Nd$_{2}$Mo$_{2}$O$_{7}$. A sharp decrease of the Hall resistivity upon a metamagnetic transition, perhaps associated with magnetic-field ($H$) induced flop of Dy$^{3+}$ ... More
Anisotropic Decay Dynamics of Photoexcited Aligned Carbon Nanotube BundlesDec 31 2006We have performed polarization-dependent ultrafast pump-probe spectroscopy of a film of aligned single-walled carbon nanotube bundles. By taking into account imperfect nanotube alignment as well as anisotropic absorption cross sections, we quantitatively ... More
Dual-camera system for high-speed imaging in particle image velocimetryMar 31 2012Particle image velocimetry is an important technique in experimental fluid mechanics, for which it has been essential to use a specialized high-speed camera. However, the high speed is at the expense of other performances of the camera, i.e., sensitivity ... More
A note on Rome-Southampton Renormalization with Smeared Gauge FieldsJun 04 2013We have calculated continuum limit step scaling functions of bilinear and four-fermion operators renormalized in a Rome-Southampton scheme using various smearing prescriptions for the gauge field. Also, for the first time, we have calculated non-perturbative ... More
P-Process Nucleosynthesis inside Supernova-Driven Supercritical Accretion DisksNov 08 2002We investigate p-process nucleosynthesis in a supercritical accretion disk around a compact object of 1.4 M_solar, using the self-similar solution of an optically thick advection dominated flow. Supercritical accretion is expected to occur in a supernova ... More
Applications of the Ashtekar gravity to four dimensional hyperkähler geometry and Yang-Mills InstantonsOct 10 1996Oct 22 1996The Ashtekar-Mason-Newman equations are used to construct the hyperk\"ahler metrics on four dimensional manifolds. These equations are closely related to anti self-dual Yang-Mills equations of the infinite dimensional gauge Lie algebras of all volume ... More
Absence of Superconductivity in the "hole-doped" Fe pnictide Ba(Fe$_{1-x}$Mn$_{x}$)$_{2}$As$_{2}$: Photoemission and X-ray Absorption Spectroscopy StudiesJul 31 2013We have studied the electronic structure of Ba(Fe$_{1-x}$Mn$_{x}$)$_{2}$As$_{2}$ ($x$=0.08), which fails to become a superconductor in spite of the formal hole doping like Ba$_{1-x}$K$_{x}$Fe$_{2}$As$_{2}$, by photoemission spectroscopy and X-ray absorption ... More
Interfacial mode coupling as the origin of the enhancement of Tc in FeSe films on SrTiO3Dec 10 2013May 11 2015Single unit cell films of iron selenide (1UC FeSe) grown on SrTiO3 (STO) substrates have recently shown superconducting energy gaps opening at temperatures close to the boiling point of liquid nitrogen (77 K), a record for iron-based superconductors. ... More
Topology conserving gauge action and the overlap-Dirac operatorOct 28 2005Dec 09 2005We apply the topology conserving gauge action proposed by Luescher to the four-dimensional lattice QCD simulation in the quenched approximation. With this gauge action the topological charge is stabilized along the hybrid Monte Carlo updates compared ... More