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The $GW$ approach of many-body perturbation theory (MBPT) has become a common tool for calculating the electronic structure of materials. However, with increasing number of published results, discrepancies between the values obtained by…

材料科学 · 物理学 2016-08-03 Dmitrii Nabok , Andris Gulans , Claudia Draxl

The subject of this paper is the technology (the "how") of constructing machine-learning interatomic potentials, rather than science (the "what" and "why") of atomistic simulations using machine-learning potentials. Namely, we illustrate…

We present an efficient scheme for accurate electronic structure interpolations based on the systematically improvable optimized atomic orbitals. The atomic orbitals are generated by minimizing the spillage value between the atomic basis…

材料科学 · 物理学 2015-05-20 Mohan Chen , G-C Guo , Lixin He

We have developed an efficient computational scheme utilizing the real-space finite-difference formalism and the projector augmented-wave (PAW) method to perform precise first-principles electronic-structure simulations based on the density…

We present a Mathematica program package MagneticTB, which can generate the tight-binding model for arbitrary magnetic space group. The only input parameters in MagneticTB are the (magnetic) space group number and the orbital information in…

材料科学 · 物理学 2022-01-25 Zeying Zhang , Zhi-Ming Yu , Gui-Bin Liu , Yugui Yao

Accurate electronic structure calculations might be one of the most anticipated applications of quantum computing.The recent landscape of quantum simulations within the Hartree-Fock approximation raises the prospect of substantial theory…

量子物理 · 物理学 2023-08-04 Junxu Li , Xingyu Gao , Manas Sajjan , Ji-Hu Su , Zhao-Kai Li , Sabre Kais

We present a new program package for calculating one-loop Feynman integrals, based on a new method avoiding Feynman parametrization and the contraction due to Passarino and Veltman. The package is calculating one-, two- and three-point…

高能物理 - 唯象学 · 物理学 2011-04-20 L. Brücher , J. Franzkowski , D. Kreimer

We present a computer code that analytically evaluates the matrix elements of the microscopic nuclear Hamiltonian and unity operator between Slater determinants of displaced gaussian single particle orbits. Such matrix elements appear in…

核理论 · 物理学 2009-10-22 K. Varga

We present M-SPARC: MATLAB-Simulation Package for Ab-initio Real-space Calculations. It can perform pseudopotential spin-polarized and unpolarized Kohn-Sham Density Functional Theory (DFT) simulations for isolated systems such as molecules…

计算物理 · 物理学 2019-12-23 Qimen Xu , Abhiraj Sharma , Phanish Suryanarayana

Here we describe the development of the MALTS software which is a generalised tool that simulates Lorentz Transmission Electron Microscopy (LTEM) contrast of thin magnetic nanostructures. Complex magnetic nanostructures typically have…

材料科学 · 物理学 2012-10-11 S. K. Walton , K. Zeissler , W. R. Branford , S. Felton

We introduce a computational framework leveraging universal machine learning interatomic potentials (MLIPs) to dramatically accelerate the calculation of photoluminescence (PL) spectra of atomic or molecular emitters with ab initio…

We present a general method of constructing \textit{in-situ} pseodopotentials from first principles, all-electron, full-potential electronic structure calculations of a solid. The method is applied to bcc Na, at equilibrium volume. The…

材料科学 · 物理学 2021-02-10 K. Björnson , J. M. Wills , M. Alouani , O. Grånäs , P. Thunström , Chin Shen Ong , O. Eriksson

We theoretically demonstrate that the desired $p_{x,y}$-orbital honeycomb electron lattice can be readily realized by arranging CO molecules into a hexagonal lattice on Cu(111) surface with scanning tunneling microscopy (STM). The…

介观与纳米尺度物理 · 物理学 2022-03-22 Wen-Xuan Qiu , Liang Ma , Jing-Tao Lü , Jin-Hua Gao

We present an efficient algorithm for calculating multiloop Feynman integrals perturbatively.

量子物理 · 物理学 2009-10-31 Boris Kastening , Hagen Kleinert

In this note I illustrate the program MINT, a FORTRAN program for Monte Carlo adaptive integration and generation of unweighted distributions.

高能物理 - 唯象学 · 物理学 2007-09-14 P. Nason

Extended free energy Lagrangians are proposed for first principles molecular dynamics simulations at finite electronic temperatures for plane-wave pseudopotential and local orbital density matrix based calculations. Thanks to the extended…

化学物理 · 物理学 2011-11-02 Anders M. N. Niklasson , Peter Steneteg , Nicolas Bock

Methods for calculating an electron density of a periodic crystal constructed using non-orthogonal localised orbitals are discussed. We demonstrate that an existing method based on the matrix expansion of the inverse of the overlap matrix…

计算物理 · 物理学 2009-11-10 Lev Kantorovich , Oleh Danyliv

We introduce a practical and efficient approach for calculating the all-electron full potential bandstructure in real space, employing a finite element basis. As an alternative to the k-space method, the method involves the self-consistent…

材料科学 · 物理学 2023-07-25 Dongming Li , James Kestyn , Eric Polizzi

In the paper an approach is presented allowing to model quantum logic circuits by electronic gates for discrete spatially modulated electromagnetic signals. The designed circuitry is for modeling low scale quantum nets of general design and…

量子物理 · 物理学 2007-05-23 G. A. Kouzaev

We present Integer Linear Programming (ILP) Modulo Theories (IMT). An IMT instance is an Integer Linear Programming instance, where some symbols have interpretations in background theories. In previous work, the IMT approach has been…

计算机科学中的逻辑 · 计算机科学 2013-04-09 Panagiotis Manolios , Vasilis Papavasileiou