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Killing transform on regular Dirichlet subspaces  [PDF]
Liping Li,Jiangang Ying
Mathematics , 2015,
Abstract: In this paper, we shall consider the killing transform induced by a multiplicative functional on regular Dirichlet subspaces of a fixed Dirichlet form. Roughly speaking, a regular Dirichlet subspace is a closed subspace with Dirichlet and regular properties of fixed Dirichlet space. By using the killing transforms, our main results indicate that the big jump part of fixed Dirichlet form is not essential for discussing its regular Dirichlet subspaces. This fact is very similar to the status of killing measure when we consider the questions about regular Dirichlet subspaces in [6].
Numerical minimisation of Gutzwiller energy functionals  [PDF]
J?rg Bünemann,Florian Gebhard,Tobias Schickling,Werner Weber
Physics , 2011, DOI: 10.1002/pssb.201147585
Abstract: We give a comprehensive introduction into an efficient numerical scheme for the minimisation of Gutzwiller energy functionals in studies on multi-band Hubbard models. Our method covers all conceivable cases of Gutzwiller variational wave functions and has been used successfully in previous numerical studies.
Energy Functionals for the Parabolic Monge-Ampere Equation  [PDF]
Zuoliang Hou,Qi Li
Mathematics , 2007,
Abstract: We introduce certain energy functionals to the complex Monge-Ampere equation over a bounded domain with inhomogeneous boundary condition, and use these functionals to show the convergence of the solution to the parabolic Monge-Ampere equation.
Energy functionals and K?hler-Ricci solitons  [PDF]
Haozhao Li
Mathematics , 2009,
Abstract: In this paper, we generalize Chen-Tian energy functionals to K\"ahler-Ricci solitons and prove that the properness of these functionals is equivalent to the existence of K\"ahler-Ricci solitons. We also discuss the equivalence of the lower boundedness of these functionals and their relation with Tian-Zhu's holomorphic invariant.
Energy functionals and canonical Kahler metrics  [PDF]
Jian Song,Ben Weinkove
Mathematics , 2005,
Abstract: Yau conjectured that a Fano manifold admits a Kahler-Einstein metric if and only if it is stable in the sense of geometric invariant theory. There has been much progress on this conjecture by Tian, Donaldson and others. The Mabuchi energy functional plays a central role in these ideas. We study the E_k functionals introduced by X.X. Chen and G. Tian which generalize the Mabuchi energy. We show that if a Fano manifold admits a Kahler-Einstein metric then the functional E_1 is bounded from below, and, modulo holomorphic vector fields, is proper. This answers affirmatively a question raised by Chen. We show in fact that E_1 is proper if and only if there exists a Kahler-Einstein metric, giving a new analytic criterion for the existence of this canonical metric, with possible implications for the study of stability. We also show that on a Fano Kahler-Einstein manifold all of the functionals E_k are bounded below on the space of metrics with nonnegative Ricci curvature.
Super-energy and Killing-Yano tensors  [PDF]
Ovidiu Tintareanu-Mircea,Florian Catalin Popa
Physics , 2004, DOI: 10.2478/BF02475592
Abstract: In this paper we investigate a class of basic super-energy tensors, namely those constructed from Killing-Yano tensors, and give a generalization of super-energy tensors for cases when we start not with a single tensor, but with a pair of tensors.
Surface Symmetry Energy of Nuclear Energy Density Functionals  [PDF]
N. Nikolov,N. Schunck,W. Nazarewicz,M. Bender,J. Pei
Physics , 2010, DOI: 10.1103/PhysRevC.83.034305
Abstract: We study the bulk deformation properties of the Skyrme nuclear energy density functionals. Following simple arguments based on the leptodermous expansion and liquid drop model, we apply the nuclear density functional theory to assess the role of the surface symmetry energy in nuclei. To this end, we validate the commonly used functional parametrizations against the data on excitation energies of superdeformed band-heads in Hg and Pb isotopes, and fission isomers in actinide nuclei. After subtracting shell effects, the results of our self-consistent calculations are consistent with macroscopic arguments and indicate that experimental data on strongly deformed configurations in neutron-rich nuclei are essential for optimizing future nuclear energy density functionals. The resulting survey provides a useful benchmark for further theoretical improvements. Unlike in nuclei close to the stability valley, whose macroscopic deformability hangs on the balance of surface and Coulomb terms, the deformability of neutron-rich nuclei strongly depends on the surface-symmetry energy; hence, its proper determination is crucial for the stability of deformed phases of the neutron- rich matter and description of fission rates for r-process nucleosynthesis.
Generalized Analytic Fourier-Feynman Transform of Functionals in a Banach Algebra  [PDF]
Jae Gil Choi,David Skoug,Seung Jun Chang
Journal of Function Spaces , 2013, DOI: 10.1155/2013/954098
Abstract: We introduce the Fresnel type class . We also establish the existence of the generalized analytic Fourier-Feynman transform for functionals in the Banach algebra . 1. Introduction Let be a separable Hilbert space and let be the space of all complex-valued Borel measures on . The Fourier transform of in is defined by The set of all functions of the form (1) is denoted by and is called the Fresnel class of . Let be an abstract Wiener space. It is known [1, 2] that each functional of the form (1) can be extended to uniquely by where is a stochastic inner product between and . The Fresnel class of is the space of (equivalence classes of) all functionals of the form (2). There has been a tremendous amount of papers and books in the literature on the Fresnel integral theory and Fresnel classes and on abstract Wiener and Hilbert spaces. For an elementary introduction see [3, Chapter 20]. Furthermore, in [1], Kallianpur and Bromley introduced a larger class than the Fresnel class and showed the existence of the analytic Feynman integral of functionals in for a successful treatment of certain physical problems by means of a Feynman integral. The Fresnel class of is the space of (equivalence classes of) all functionals on of the following form: where and are bounded, nonnegative, and self-adjoint operators on and . In this paper we study the functionals of the form (3) with in a very general function space . The function space , induced by generalized Brownian motion process, was introduced by Yeh [4, 5] and was used extensively in [6–13]. In this paper, we also construct a concrete theory of the generalized analytic Fourier-Feynman transform (GFFT) of functionals in a generalized Fresnel type class defined on . Other work involving GFFT theories on include [6, 7, 9, 12, 13]. The Wiener process used in [1, 2, 14–17] is stationary in time and is free of drift while the stochastic process used in this paper, as well as in [4, 6–13, 18], is nonstationary in time and is subject to a drift . It turns out, as noted in Remark 7 below, that including a drift term makes establishing the existence of the GFFT of functionals on very difficult. However, when and on , the general function space reduces to the Wiener space . 2. Definitions and Preliminaries Let be an absolutely continuous real-valued function on with , , and let be a strictly increasing, continuously differentiable real-valued function with and for each . The generalized Brownian motion process determined by and is a Gaussian process with mean function and covariance function . For more details, see [6, 10,
Neutron Drops and Skyrme Energy-Density Functionals  [PDF]
B. S. Pudliner,A. Smerzi,J. Carlson,V. R. Pandharipande,Steven C. Pieper,D. G. Ravenhall
Physics , 1995, DOI: 10.1103/PhysRevLett.76.2416
Abstract: The J$^{\pi}$=0$^+$ ground state of a drop of 8 neutrons and the lowest 1/2$^-$ and 3/2$^-$ states of 7-neutron drops, all in an external well, are computed accurately with variational and Green's function Monte Carlo methods for a Hamiltonian containing the Argonne $v_{18}$ two-nucleon and Urbana IX three-nucleon potentials. These states are also calculated using Skyrme-type energy-density functionals. Commonly used functionals overestimate the central density of these drops and the spin-orbit splitting of 7-neutron drops. Improvements in the functionals are suggested.
Kinetic Energy Density Study of Some Representative Semilocal Kinetic Energy Functionals  [PDF]
David Garcia-Aldea,J. E. Alvarellos
Physics , 2007, DOI: 10.1063/1.2774974
Abstract: There is a number of explicit kinetic energy density functionals for non-interacting electron systems that are obtained in terms of the electron density and its derivatives. These semilocal functionals have been widely used in the literature. In this work we present a comparative study of the kinetic energy density of these semilocal functionals, stressing the importance of the local behavior to assess the quality of the functionals. We propose a quality factor that measures the local differences between the usual orbital-based kinetic energy density distributions and the approximated ones, allowing to ensure if the good results obtained for the total kinetic energies with these semilocal functionals are due to their correct local performance or to error cancellations. We have also included contributions coming from the laplacian of the electron density to work with an infinite set of kinetic energy densities. For all the functionals but one we have found that their success in the evaluation of the total kinetic energy are due to global error cancellations, whereas the local behavior of their kinetic energy density becomes worse than that corresponding to the Thomas-Fermi functional.
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