Results 21 to 30 of about 7,625,136 (322)
Alchemical perturbation density functional theory
Physical Review Research, 2020 We introduce an orbital-free electron density functional approximation based on alchemical perturbation theory. Given convergent perturbations of a suitable reference system, the accuracy of popular self-consistent Kohn-Sham density functional estimates ...
Guido Falk von Rudorff +1 more
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Hubbard parameters from density-functional perturbation theory [PDF]
Physical review B, 2018 We present a transparent and computationally efficient approach for the first-principles calculation of Hubbard parameters from linear-response theory.
I. Timrov, N. Marzari, M. Cococcioni
semanticscholar +1 more source
Chiral Perturbation Theory [PDF]
, 1996 An introduction to the methods and ideas of Chiral Perturbation Theory is presented in this talk. The discussion is illustrated with some phenomenological predictions that can be compared with available experimental results.Comment: 16 pages, 4 ...
Céline Cornet +2 more
core +2 more sources
Nonlinear perturbation theory extension of the Boltzmann code CLASS
Physical Review D, 2020 We present a new open-source code that calculates one-loop power auto- and cross-power spectra for matter fields and biased tracers in real and redshift space.
A. Chudaykin +3 more
semanticscholar +1 more source
Conformal perturbation theory [PDF]
, 2017 Statistical systems near a classical critical point have been intensively studied both from theoretical and experimental points of view. In particular, correlation functions are of relevance in comparing theoretical models with the experimental data of ...
Amoretti, Andrea, Magnoli, Nicodemo
core +2 more sources
Amplitude/operator basis in chiral perturbation theory
Journal of High Energy Physics, 2023 We establish a systematic construction of the on-shell amplitude/operator basis for Chiral Perturbation Theory (ChPT) in D = 4 spacetime dimensions and with an arbitrary number of flavors N f .
Ian Low +3 more
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Lattice perturbation theory [PDF]
Physics Reports, 2003 The consideration of quantum fields defined on a spacetime lattice provides computational techniques which are invaluable for studying gauge theories nonperturbatively from first principles. Perturbation theory is an essential aspect of computations on the lattice, especially for investigating the behavior of lattice theories near the continuum limit ...
openaire +3 more sources
Nonperturbative ``Lattice Perturbation Theory'' [PDF]
, 1994 We discuss a program for replacing standard perturbative methods with Monte Carlo simulations in short distance lattice gauge theory calculations.Comment: 3 pages, uuencoded Latex file, two embedded figures and .sty file ...
G. Peter Lepage +4 more
core +3 more sources
Semistochastic Heat-Bath Configuration Interaction Method: Selected Configuration Interaction with Semistochastic Perturbation Theory. [PDF]
Journal of Chemical Theory and Computation, 2016 We extend the recently proposed heat-bath configuration interaction (HCI) method [Holmes, Tubman, Umrigar, J. Chem. Theory Comput. 2016, 12, 3674], by introducing a semistochastic algorithm for performing multireference Epstein-Nesbet perturbation theory,
Sandeep Sharma +4 more
semanticscholar +1 more source