Results for "Daisuke Nishio-Hamane"

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Synthesis of anti-perovskite-type carbides and nitrides from metal oxides and melamineApr 12 2019Four anti-perovskite-type compounds, ZnNNi3, ZnCNi3, SnNCo3, and SnCCo3, are synthesised through reactions between ingredient metal oxides and organic compound melamine (C3H6N6). ZnNNi3 and ZnCNi3 are selectively synthesised by choosing different reaction ... More
Weak ferromagnetic order breaking the threefold rotational symmetry of the underlying kagomé lattice in CdCu$_3$(OH)$_6$(NO$_3$)$_2\cdot$H$_2$OMar 28 2017Novel magnetic phases are expected to occur in highly frustrated spin systems. Here we study the structurally perfect kagom\'e antiferromagnet CdCu$_3$(OH)$_6$(NO$_3$)$_2\cdot$H$_2$O by magnetization, magnetic torque, and heat capacity measurements using ... More
Large anomalous Nernst effect at room temperature in a chiral antiferromagnetSep 20 2017Temperature gradient in a ferromagnetic conductor may generate a spontaneous transverse voltage drop in the direction perpendicular to both magnetization and heat current. This anomalous Nernst effect (ANE) has been considered to be proportional to the ... More
"Visible" 5d orbital states in a pleochroic oxychlorideApr 12 2019Transition metal compounds sometimes exhibit beautiful colors. We report here on a new oxychloride Ca3ReO5Cl2 which shows unusually distinct pleochroism; that is, the material exhibits different colors depending on viewing directions. This ple-ochroism ... More
Giant anomalous Nernst effect and quantum-critical scaling in a ferromagnetic semimetalJul 12 2018In metallic ferromagnets, the Berry curvature of underlying quasiparticles can cause an electric voltage perpendicular to both magnetization and an applied temperature gradient, a phenomenon called the anomalous Nernst effect (ANE). Here, we report the ... More
Faster Deep Q-learning using Neural Episodic ControlJan 06 2018Jun 03 2018The research on deep reinforcement learning which estimates Q-value by deep learning has been attracted the interest of researchers recently. In deep reinforcement learning, it is important to efficiently learn the experiences that an agent has collected ... More
Skewness Dependence of GPD / DVCS, Conformal OPE and AdS/CFT Correspondence II: a holographic model of GPDAug 27 2014Traditional idea of Pomeron/Reggeon description for hadron scattering is now being given theoretical foundation in gravity dual descriptions, where Pomeron corresponds to exchange of spin-$j \in 2\mathbb{Z}$ states in the graviton trajectory. Deeply virtual ... More
Skewness Dependence of GPD / DVCS, Conformal OPE and AdS/CFT Correspondence I: Wavefunctions of Regge TrajectoryDec 13 2012Traditional idea of Pomeron/Reggeon description for hadron scattering is now being given theoretical foundation in gravity dual descriptions, where Pomeron corresponds to exchange of spin-j\in 2Z states in the graviton trajectory. Deeply virtual compton ... More
Random Projection in Neural Episodic ControlApr 03 2019End-to-end deep reinforcement learning has enabled agents to learn with little preprocessing by humans. However, it is still difficult to learn stably and efficiently because the learning method usually uses a nonlinear function approximation. Neural ... More
Metastability of R-Charged Black HolesJan 27 2007Jul 04 2007The global stability of R-charged AdS black holes in a grand canonical ensemble is examined by eliminating the constraints from the action, but without solving the equations of motion, thereby constructing the reduced action of the system. The metastability ... More
Box ball system associated with antisymmetric tensor crystalsDec 26 2003Mar 18 2007A new box ball system associated with an antisymmetric tensor crystal of the quantum affine algebra of type A is considered. This includes the so-called colored box ball system with capacity 1 as the simplest case. Infinite number of conserved quantities ... More
On singular fibres of complex Lagrangian fibrationsNov 22 1999We classify singular fibres over general points of the discriminant locus of projective complex Lagrangian fibrations on 4-dimensional holomorphic symplectic manifolds. The singular fibre F is the following either one: F is isomorphic to the product of ... More
Impacts of Radial Mixing on the Galactic Thick and Thin DisksAug 10 2017Using N-body simulations of the Galactic disks, we qualitatively study how the metallicity distributions of the thick and thin disk stars are modified by radial mixing induced by the bar and spiral arms. We show that radial mixing drives a positive vertical ... More
Nonlinear electromagnetic response in quark-gluon plasmaJun 26 2014We perform the first systematic study of the nonlinear electromagnetic currents induced by external electromagnetic field in quark-gluon plasma, both in the two cases that the inhomogeneity of electromagnetic field is small (large) so that the collision ... More
Two-sided random walks conditioned to have no intersectionsJun 27 2011Let $S^{1},S^{2}$ be independent simple random walks in $\mathbb{Z}^{d}$ ($d=2,3$) started at the origin. We construct two-sided random walk paths conditioned that $S^{1}[0,\infty) \cap S^{2}[1, \infty) = \emptyset$.
Lambda(1405) and kaonic few-body states in chiral dynamicsMar 14 2011Mar 18 2011The present status of the Lambda(1405) structure study in chiral dynamics is briefly reviewed. It turns out that the Lambda(1405) resonance can be described by hadronic dynamics. The idea of the hadronic molecular state is extended to kaonic few-body ... More
Modeling the Outskirts of Galaxy Clusters with Cosmological SimulationsJan 06 2011We present cosmological simulations of galaxy clusters, with focus on the cluster outskirts. We show that large-scale cosmic accretion and mergers produce significant internal gas motions and inhomogeneous gas distribution ("clumpiness") in the intracluster ... More
Fourier-Laplace transform and isomonodromic deformationsJun 03 2013Jan 27 2014Using the Fourier-Laplace transform, we describe the isomonodromy equations for meromorphic connections on the Riemann sphere with unramified irregular singularities as those for connections with a (possibly ramified) irregular singularity and a regular ... More
Geometry of Multiplicative Preprojective AlgebraOct 14 2007Nov 15 2007Crawley-Boevey and Shaw recently introduced a certain multiplicative analogue of the deformed preprojective algebra, which they called the multiplicative preprojective algebra. In this paper we study the moduli space of (semi)stable representations of ... More
On almost holomorphic Lagrangian fibrationsSep 06 2012We prove that the pull back of an ample line bundle by an almost holomorphic Lagrangian fibration is nef. As an application, we show birational semi rigidity of Lagrangian fibrations.
Evaluation of spin diffusion length and spin Hall angle of antiferromagnetic Weyl semimetal Mn$_3$SnFeb 18 2019Antiferromagnetic Weyl semimetal Mn$_3$Sn has shown to generate strong intrinsic anomalous Hall effect (AHE) at room temperature, due to large momentum-space Berry curvature from the time-reversal symmetry breaking electronic bands of the Kagome planes. ... More
Naive Dimensional Analysis in HolographyMay 14 2012May 27 2012Naive dimensional analysis (NDA) is a widely used ansatz to estimate coupling constants among composite states emerging from dynamics of a strongly coupled gauge theory. However, the validity of NDA is still unclear because of the difficulty in calculating ... More
Middle Convolution and Harnad DualityNov 19 2009Feb 08 2010We interpret the additive middle convolution operation in terms of the Harnad duality, and as an application, generalize the operation to have a multi-parameter and act on irregular singular systems.
A twining character formula for Demazure modules (abstract)May 03 2001May 15 2001We give a twining character formula for Demazure modules.
Fujiki relation on symplectic varietiesSep 22 2001We generalize Fujiki relation of Beauville-Bogomolov quadratic form on a projective symplectic variety. As an application, we study a fibre space structure of a projective symplectic variety.
A determinant formula for relative congruence zeta functions for cyclotomic function fieldsJun 17 2009Jul 17 2009Rosen M. gave a determinant formula for relative class numbers for the P-th cyclotomic function fields in the case of the monic irreducible polynomial P, which is regarded as an analogue of the classical Maillet determinant. In this paper, we will give ... More
Static charged perfect fluid with the Weyl-Majumdar relationJun 17 1999Apr 12 2000Static charged perfect fluid distributions have been studied. It is shown that if the norm of the timelike Killing vector and the electrostatic potential have the Weyl-Majumdar relation, then the background spatial metric is the space of constant curvature, ... More
Power variations and testing for co-jumps: the small noise approachMay 09 2016Jun 20 2016In this paper we study the effects of noise on the bipower variation (BPV), realized volatility (RV) and testing for co-jumps in high-frequency data under the small noise framework. We first establish asymptotic properties of the BPV in this framework. ... More
Projection Mapping Technologies for ARApr 10 2017This invited talk will present recent projection mapping technologies for augmented reality. First, fundamental technologies are briefly explained, which have been proposed to overcome the technical limitations of ordinary projectors. Second, augmented ... More
Discretization of Self-Exciting Peaks Over Threshold ModelsDec 19 2016Apr 09 2017In this paper, a framework on a discrete observation of (marked) point processes under the high-frequency observation is developed. Based on this framework, we first clarify the relation between random coefficient integer-valued autoregressive process ... More
Hausdorff dimension of the scaling limit of loop-erased random walk in three dimensionsApr 27 2016Let $M_{n}$ be the length (number of steps) of the loop-erasure of a simple random walk up to the first exit from a ball of radius $n$ centered at its starting point. It is shown in [18] that there exists $\beta \in (1, \frac{5}{3}]$ such that $E (M_{n} ... More
A basis construction for the Shi arrangement of the type $B_{\ell}$ or $C_{\ell}$May 29 2012The Shi arrangement is an affine arrangement of hyperplanes consisting of the hyperplanes of the Weyl arrangement and their parallel translations. It was introduced by J.-Y. Shi in the study of the Kazhdan-Lusztig representation of the affine Weyl groups. ... More
Scattering Rule in Soliton Cellular Automaton associated with Crystal Base of $U_q(D_4^{(3)})$Sep 03 2006Mar 18 2007In terms of the crystal base of a quantum affine algebra $U_q(\mathfrak{g})$, we study a soliton cellular automaton (SCA) associated with the exceptional affine Lie algebra $\mathfrak{g}=D_4^{(3)}$. The solitons therein are labeled by the crystals of ... More
Upper Bound for Diameter of Cosmological Black Holes and Nonexistence of Black StringsSep 29 2016The diameter of the apparent horizon, defined by the distance between furthest points on the horizon, in spacetimes with a positive cosmological constant $\varLambda$ has been investigated. It is established that the diameter of the apparent horizon on ... More
Brane-world cosmologyDec 01 1999A simple model of the brane-world cosmology has been proposed, which is characterized by four parameters, the bulk cosmological constant, the spatial curvature of the universe, the radiation strength arising from bulk space-time and the breaking parameter ... More
On fibre space structures of a projective irreducible symplectic manifoldSep 30 1997In this note, we investigate fibre space structures of a projective irreducible symplectic manifold. We prove that an 2n-dimensional projective irreducible symplectic manifold admits only an n-dimensional fibration over a Fano variety which has only Q-factorial ... More
On subgroups of an automorphism group of an irreducible symplectic manifoldAug 30 2018Dec 28 2018Let X be an irreducible symplectic manifold and L a nef line bundle on X which is isotropic with respect to the Beauville-Bogomolov quadratic form. It is known that a subgroup Aut(X,L) of an automorphism group of X which fix L is almost abelian. We give ... More
On nonparametric inference for spatial regression models under domain expanding and infill asymptoticsApr 25 2018Mar 05 2019In this paper, we develop nonparametric inference on spatial regression models as an extension of Lu and Tj\ostheim(2014), which develops nonparametric inference on density functions of stationary spatial processes under domain expanding and infill (DEI) ... More
Nonparametric inference on Lévy measures of Lévy-driven Ornstein-Uhlenbeck processes under discrete observationsMar 23 2018Mar 05 2019In this paper, we study nonparametric inference on a stationary L\'evy-driven Ornstein-Uhlenbeck (OU) process $X = (X_{t})_{t \geq 0}$ with a compound Poisson subordinator. We propose a new spectral estimator for the L\'evy measure of the L\'evy-driven ... More
Effects of Top-quark Compositeness on Higgs Boson Production at the LHCNov 10 2009Jul 14 2010Motivated by the possibility that the right-handed top-quark (t_R) is composite, we discuss the effects of dimension-six operators on the Higgs boson production at the LHC. When t_R is the only composite particle among the Standard Model (SM) particles, ... More
Recent progress in lattice supersymmetry: from lattice gauge theory to black holesJul 05 2016Supersymmetry (SUSY) is a fascinating topic in theoretical physics, because of its unique and counterintuitive properties. It is expected to emerge as new physics beyond the standard model, and it is also a building block for supergravity and superstring ... More
Mesons in Nuclei and Partial Restoration of Chiral SymmetryMar 23 2016Jul 12 2016Recent topics on mesons in nuclei are discussed by especially emphasizing the role of the partial restoration of chiral symmetry in the nuclear medium. The spontaneously broken chiral symmetry in vacuum is considered to be incompletely restored in finite ... More
spmoran: An R package for Moran's eigenvector-based spatial regression analysisMar 13 2017Oct 06 2018This study illustrates how to use "spmoran," which is an R package for Moran's eigenvector-based spatial regression analysis. spmoran estimates regression models in the presence of spatial dependence; the models include eigenvector spatial filtering (ESF) ... More
Growth exponent for loop-erased random walk in three dimensionsOct 07 2013Apr 26 2016We show the existence of the growth exponent for loop-erased random walk in three dimensions.
Diagrammatic and Kinetic Equation Analysis of Ultrasoft Fermionic Sector in Quark-Gluon PlasmaMar 26 2013At so high temperature (T) that the coupling constant (g) is small and the masses of the particles are negligible, different scheme has to be applied in each energy scale in the analysis of the quark-gluon plasma (QGP). In the soft energy region (p gT), ... More
Addendum to: On fibre space structures of a projective irreducible symplectic manifoldMar 08 1999In this note, we prove that every fibre space structures of a projective irreducible symplectic manifold is a lagrangian fibration.
Galaxy Formation from a Low-Spin Density Perturbation in a CDM UniverseSep 07 1999In order to understand the formation process of elliptical galaxies which are not rotationally supported, we have carried out numerical simulations of the galaxy formation from the density perturbation with a rotation corresponding to a small spin parameter. ... More
Equidimensionality of complex Lagrangian fibrationsNov 22 1999Nov 23 1999We prove that every irreducible component of a fibre of a complex Lagrangian fibration is Lagrangian subvariety. Especially, complex Lagrangian fibations are equidimensional.
A canonical bundle formular of projective Lagrangian fibrationsSep 30 2007We classify singular fibres of a projective Lagrangian fibration over codimension one points. As an application, we obtain a canonical bundle formula for a projective Lagrangian fibration over a smooth manifold.
No Black Hole Theorem in Three-Dimensional GravityMay 31 2000Sep 26 2000A common property of known black hole solutions in (2+1)-dimensional gravity is that they require a negative cosmological constant. In this letter, it is shown that a (2+1)-dimensional gravity theory which satisfies the dominant energy condition forbids ... More
Precision test of the gauge/gravity duality in two-dimensional N=(8,8) SYMFeb 06 2017The $\epsilon - p$ is calculated from lattice simulations of two dimensional ${\cal N}=(8,8)$ $SU(N)$ SYM to test the gauge gravity duality. We employ the Sugino action with keeping two of sixteen supercharges exactly on the lattice. The thermodynamics ... More
Fault-tolerance of ancilla preparation for logical Toffoli gate of a family of Calderbank-Shor-Steane codesJul 16 2010Mar 15 2013Fault-tolerant quantum computation using quantum error-correcting codes requires fault-tolerant constructions of nontransversal gates. Shor proposed a fault-tolerant construction of a nontransversal gate, i.e., the Toffoli gate for a family of the Calderbank-Shor-Steane ... More
Correlated cluster mean-field theory for spin systemsDec 22 2008Apr 27 2009A cluster mean-field method is introduced and the applications to the Ising and Heisenberg models are demonstrated. We divide the lattice sites into clusters whose size and shape are selected so that the equivalence of all sites in a cluster is preserved. ... More
Hadronic few-body systems in chiral dynamics, -- Few-body systems in hadron physics --Oct 06 2012Hadronic composite states are introduced as few-body systems in hadron physics. The $\Lambda(1405)$ resonance is a good example of the hadronic few-body systems. It has turned out that $\Lambda(1405)$ can be described by hadronic dynamics in a modern ... More
On nef reductions of projective irreducible symplectic manifoldsJan 06 2006Jan 20 2006Let X be a projective irreducible symplectic manifold and L a non trivial nef divisor on X. Assume that the nef dimension of L is strictly less than the dimension of X. We prove that L is semiample
2-form gauge theory dual to scalar-tensor theoryJun 06 2019We generalize the electromagnetic duality between a massless, canonical scalar field and a 2-form gauge field in 4-dimensional spacetime to scalar-tensor theories. We derive the action of 2-form gauge field that is dual to two kinds of scalar-tensor theories: ... More
On isotropic divisors on irreducible symplectic manifoldsOct 03 2013May 30 2014Let X be an irreducible symplectic manifold and L a divisor on X. Assume that L is isotropic with respect to the Beauville-Bogomolov quadratic form. We define the rational Lagrangian locus and the movable locus on the universal deformation space of the ... More
On deformations of Lagrangian fibrationsMar 12 2009Jun 10 2015Let X be an irreducible symplectic manifold and Def(X) the Kuranishi space. Assume that X admits a Lagrangian fibration. We prove that X can be deformed preserving a Lagrangian fibration. More precisely, there exists a smooth hypersurface H of Def(X) ... More
Superconducting properties of the ternary transition-metal silicide Zr2Ru3Si4Oct 22 2013Superconducting properties of the polycrystalline Zr2Ru3Si4 were investigated by the electrical resistivity, magnetization and specific heat. By these measurements, bulk superconductivity with transition temperature Tc = 5.5 K was confirmed. Moreover, ... More
Tensor Product Variational Formulation for Quantum SystemsJan 08 2004We consider a variational problem for the two-dimensional (2D) Heisenberg and XY models, using a trial state which is constructed as a 2D product of local weights. Variational energy is calculated by use of the the corner transfer matrix renormalization ... More
QCD Sum Rules and 1/$N_c$ expansionAug 27 2008The 1/$N_c$ arguments are developed to classify the hadronic states in the correlators. Arguments applied to the $\sigma$ meson correlator enable to separate the instanton, glueball, and, in particular, the $\pi\pi$ scattering states by $1/N_c$ from both ... More
Galactic Wind Signatures around High Redshift GalaxiesApr 04 2007We carry out cosmological chemodynamical simulations with different strengths of supernova (SN) feedback and study how galactic winds from star-forming galaxies affect the features of hydrogen (HI) and metal (CIV and OVI) absorption systems in the intergalactic ... More
Crystal structure of the set of Lakshmibai-Seshadri paths of a level-zero shape for an affine Lie algebraOct 02 2005Let $\lambda = \sum_{i \in I_{0}} m_{i} \varpi_{i}$, with $m_{i} \in \mathbb{Z}_{\ge 0}$ for $i \in I_{0}$, be a level-zero dominant integral weight for an affine Lie algebra $\mathfrak{g}$ over $\mathbb{Q}$, where the $\varpi_{i}$, $i \in I_{0}$, are ... More
Scalar field perturbation on six-dimensional ultra-spinning black holesDec 15 2004Jan 05 2005We have studied the scalar field perturbations on six-dimensional ultra-spinning black holes. We have numerically calculated the quasinormal modes of rotating black holes. Our results suggest that such perturbations are stable.
Another approach to local cohomology problem in abelian lattice gauge theoriesApr 28 2005A new technique is proposed to classify a topological field in abelian lattice gauge theories. We perform the classification by regarding the topological field as a local composite field of the gauge field tensor instead of the vector potential associated ... More
Golodness and polyhedral products for two dimensional simplicial complexesJun 30 2015Golodness of 2-dimensional simplicial complexes is studied through polyhedral products, and combinatorial and topoogical characterization of Golodness of surface triangulations is given. An answer to the question of Berglund is also given so that there ... More
Polyhedral products for simplicial complexes with minimal Taylor resolutionsJun 05 2015We prove that for a simplicial complex $K$ whose Taylor resolution for the Stanley-Reisner ring is minimal, the following four conditions are equivalent: (1) $K$ satisfies the strong gcd-condition; (2) $K$ is Golod; (3) the moment-angle complex $\mathcal{Z}_K$ ... More
Fat wedge filtrations and decomposition of polyhedral productsDec 16 2014May 18 2015The polyhedral product constructed from a collection of pairs of cones and their bases and a simplicial complex $K$ is studied by investigating its filtration called the fat wedge filtration. We give a sufficient condition for decomposing the polyhedral ... More
Spontaneous Symmetry Breakings in $Z_2$ Gauge Theories for Doped Quantum Dimer and Eight-Vertex ModelsAug 10 2004Nov 11 2004Behavior of doped fermions in $Z_2$ gauge theories for the quantum dimer and eight-vertex models is studied. Fermions carry charge and spin degrees of freedom. In the confinement phase of the $Z_2$ gauge theories, these internal symmetries are spontaneously ... More
Electrical Conductivity of Quark-Gluon Plasma in Strong Magnetic FieldsOct 21 2016Oct 24 2016We compute the electrical conductivity of quark-gluon plasma in a strong magnetic field $B$ with quantum field theory at finite temperature using the lowest Landau level approximation. We provide the one-loop result arising from 1-to-2 scattering processes ... More
Spin splitting and Kondo effect in quantum dots coupled to noncollinear ferromagnetic leadsJul 21 2006Feb 15 2007We study the Kondo effect in a quantum dot coupled to two noncollinear ferromagnetic leads. First, we study the spin splitting $\delta\epsilon=\epsilon_{\downarrow}-\epsilon_{\uparrow}$ of an energy level in the quantum dot by tunnel couplings to the ... More
Stationary Einstein-Maxwell fields in arbitrary dimensionsJul 22 2003The Einstein-Maxwell equations in D-dimensions admitting (D-3) commuting Killing vector fields have been investigated. The existence of the electric, magnetic and twist potentials have been proved. The system is formulated as the harmonic map coupled ... More
Polyhedral products for shifted complexes and higher Whitehead productsMay 19 2015Jun 29 2018This paper studies the map between polyhedral products $\mathcal{Z}_K(C\underline{X},\underline{X})\to\mathcal{Z}_K(\Sigma\underline{X},*)$ induced from the pinch maps $(CX_i,X_i)\to(\Sigma X_i,*)$, which is the higher order Whitehead product if $K$ is ... More
Decompositions of suspensions of spaces involving polyhedral productsMay 19 2015Jul 25 2015Two homotopy decompositions of supensions of spaces involving polyhedral products are given. The first decomposition is motivated by the decomposition of suspensions of polyhedral products by Bahri, Bendersky, Cohen, and Gitler, and is a generalization ... More
Generation of Curvilinear CoordinatesNov 21 2017The authors have discussed the method and merit of introducing the curvilinear coordinates into numerical analysis and have shown some numerical examples. However, they used analytical functions for the mappings in the examples and didn't mention how ... More
Sparse Signal Recovery for Binary Compressed Sensing by Majority Voting Neural NetworksOct 29 2016In this paper, we propose majority voting neural networks for sparse signal recovery in binary compressed sensing. The majority voting neural network is composed of several independently trained feedforward neural networks employing the sigmoid function ... More
Subparsec-scale dynamics of a dusty gas disk exposed to anisotropic AGN radiation with frequency-dependent radiative transferApr 12 2016We explore the gas dynamics near the dust sublimation radius of active galactic nucleus (AGN). For the purpose, we perform axisymmetric radiation hydrodynamic simulations of a dusty gas disk of radius $\approx 1\,\mathrm{pc}$ around a supermassive black ... More
Mathematical base of Difference Operator of Particle MethodJun 09 2017Jun 12 2017Mathematical base of difference operators in Moving Particle Semi-implicit method (MPS) are not given sufficiently in contrast to Smooth Particle Hydrodynamics method (SPH). Iribe and Nakaza proposed a method to improve the accuracy of the gradient operator, ... More
Supersymmetric gradient flow in N=1 SYMDec 06 2018The gradient flow equation is derived in N=1 supersymmetric Yang-Mills theory in terms of the component field of the Wess-Zumino gauge. We show that the flow-time derivative and supersymmetry transformation that is naively extended to five dimensions ... More
CPEG: A Typed Tree Construction from Parsing Expression Grammars with Regex-Like CapturesDec 18 2018CPEG is an extended parsing expression grammar with regex-like capture annotation. Two annotations (capture and left-folding) allow a flexible construction of syntax trees from arbitrary parsing patterns. More importantly, CPEG is designed to guarantee ... More
Electron Correlation Effects in Non-Centrosymmetric Metals in the Weak Coupling RegimeJan 29 2015Jun 11 2015The two-dimensional Rashba-Hubbard model is investigated in order to clarify the electron correlation effects in non-centrosymmetric metals. The renormalization effect on Rashba spin-orbit coupling (RSOC) is calculated on the basis of second-order and ... More
Fat wedge filtrations and decomposition of polyhedral productsDec 16 2014Mar 17 2017The polyhedral product constructed from a collection of pairs of cones and their bases and a simplicial complex $K$ is studied by investigating its filtration called the fat wedge filtration. We give a sufficient condition for decomposing the polyhedral ... More
In-medium η' mass and η'N interaction in vacuum in the linear sigma modelJan 10 2014We investigate the \eta'N two-body interaction in the context of the \eta' meson mass modification in the nuclear medium. It has been argued in several articles that the masses of \eta' and the other pseudoscalar mesons (\pi, K, \eta) should degenerate ... More
Critical velocity of flowing supersolids of dipolar Bose gases in optical latticesFeb 20 2010Aug 05 2010We study superfluidity of supersolid phases of dipolar Bose gases in two-dimensional optical lattices. We perform linear stability analyses for the corresponding dipolar Bose-Hubbard model in the hardcore boson limit to show that a supersolid can have ... More
Higher order approximation of isochronsOct 20 2009Phase reduction is a commonly used techinque for analyzing stable oscillators, particularly in studies concerning synchronization and phase lock of a network of oscillators. In a widely used numerical approach for obtaining phase reduction of a single ... More
Replication of proto-RNAs sustained by ligase-helicase cycle in oligomer worldJun 02 2013A mechanism of the replication of proto-RNAs in oligomer world is proposed. The replication is carried out by a minimum cycle which is sustained by a ligase and a helicase. We expect that such a cycle actually worked in the primordial soup and can be ... More
Fermion Spectrum at Ultrasoft Region in a Hot QED/QCD PlasmaSep 01 2011Nov 16 2011An spectrum of an electron (quark) with ultrasoft momentum (p g^2T) is discussed at extremely high temperature in quantum electrodynamics (chromodynamics) with a resummed perturbation theory. We establish the existence of the pole suggested in the previous ... More
Structure of long-period stacking/order Mg-Zn-RE (RE: rare-earth and Y) phases with extended non-stoichiometry rangesJul 22 2011Sep 21 2011We propose structure models of the unique long-period stacking/order (LPSO) phases formed in the Mg-Zn-RE alloys, based on Z-contrast scanning transmission electron microscopy (STEM) observations and first-principles calculations. The LPSO structures ... More
Lattice study of supersymmetry breaking in N=2 supersymmetric quantum mechanicsDec 27 2018We study supersymmetry breaking from a lattice model of N=2 supersymmetric quantum mechanics using the direct computational method proposed in arXiv:1803.07960. The vanishing Witten index is realized as a numerical result in high precision. The expectation ... More
$K^+$-nucleus elastic scattering revisited from perspective of partial restoration of chiral symmetryMay 22 2017Sep 20 2017The $K^{+}$ meson properties in the nuclear medium are investigated by considering the wavefunction renormalization as a first step to reveal the in-medium properties of the $K^{+}$ meson in the context of partial restoration of chiral symmetry. The $K^{+}N$ ... More
Towards a self-consistent numerical model of late-type galaxies: Calibrating the effects of sub-grid physics on galactic modelsDec 07 2011Dec 09 2011We carry out several isolated galaxy evolution simulations in a fixed dark matter halo gravitational potential using the new version of our N-body/Smoothed Particle Hydrodynamics (SPH) code GCD+. The new code allows us to more accurately model and follow ... More
Dynamical supersymmetry for strange quark and $ud$ antidiquark in hadron mass spectrumApr 08 2019Speculating that the $ud$ diquark with spin 0 has a similar mass to the constituent $s$ quark, we introduce a symmetry between the $s$ quark and the $\overline{ud}$ diquark. Constructing an algebra for this symmetry, we regard a triplet of the $s$ quarks ... More
Polyhedral products for simplicial complexes with minimal Taylor resolutionsJun 05 2015Mar 17 2017We prove that for a simplicial complex $K$ whose Taylor resolution for the Stanley-Reisner ring is minimal, the following four conditions are equivalent: (1) $K$ satisfies the strong gcd-condition; (2) $K$ is Golod; (3) the moment-angle complex $\mathcal{Z}_K$ ... More
Whitehead products in moment-angle complexesJun 29 2018In toric topology, to a simplicial complex $K$ with $m$ vertices, one associates two spaces, the moment-angle complex $\mathcal{Z}_K$ and the Davis-Januszkiewicz space $DJ_K$. These spaces are connected by a homotopy fibration $\mathcal{Z}_K\to DJ_K\to(\mathbb{C}P^\infty)^m$. ... More
Homotopy decomposition of diagonal arrangementsMar 31 2014Given a space $X$ and a simplicial complex $K$ with $m$-vertices, the arrangement of partially diagonal subspaces of $X^m$, called the dragonal arrangement, is defined. We decompose the suspension of the diagonal arrangement when $2(dim K + 1) < m$, which ... More
Polyhedral products for shifted complexes and higher Whitehead productsMay 19 2015This paper studies the map between polyhedral products $\mathcal{Z}_K(C\underline{X},\underline{X})\to\mathcal{Z}_K(\Sigma\underline{X},*)$ induced from the pinch maps $(CX_i,X_i)\to(\Sigma X_i,*)$, which is the higher order Whitehead product if $K$ is ... More
Ordering of the three-dimensional Heisenberg spin glass in magnetic fieldsJun 06 2001Jun 08 2001Spin and chirality orderings of the three-dimensional Heisenberg spin glass are studied under magnetic fields in light of the recently developed spin-chirality decoupling-recoupling scenario. It is found by Monte Carlo simulations that the chiral-glass ... More
A boundary value problem for the five-dimensional stationary rotating black holesJan 24 2004We study the boundary value problem for the stationary rotating black hole solutions to the five-dimensional vacuum Einstein equation. Assuming the two commuting rotational symmetry and the sphericity of the horizon topology, we show that the black hole ... More
Half period theorem of binary black holesJul 25 2008Jun 17 2009Merging event horizons of the binary black holes is investigated. While recent development of the numerical study of the binary black hole coalescence has shown that their apparent horizons can orbit for many periods, we study the orbital motion of the ... More
CFL Phase of High Density QCD at Non Zero Strange Quark MassJul 29 2004Sep 15 2004We compute free energy of quark matter at asymptotically high baryon number density in the presence of non zero strange quark mass including dynamics of pseudo Nambu-Goldstone bosons due to chiral symmetry breaking, extending previously existing analysis ... More