Results 21 to 30 of about 138,925 (175)

Scalar ground-state observables in the random phase approximation [PDF]

, 2002
We calculate the ground-state expectation value of scalar observables in the matrix formulation of the random phase approximation (RPA). Our expression, derived using the quasiboson approximation, is a straightforward generalization of the RPA ...
A. Klein, A. Poves, B. H. Wildenthal, B. Q. Chen, C. J. Horowitz, Calvin W. Johnson, D. J. Rowe, D. J. Rowe, D. Vretenar, E. R. Marshalek, E. Tinková, F. Dönau, F. Tondeur, G. F. Bertsch, I. Stetcu, Ionel Stetcu, J. C. Parikh, J. Dukelsky, J. K. Parikh, K. Hagino, K. Hagino, N. Dinh Dang, N. Ullah, P. Möller, P. Schuck, R. E. Johnson, R. M. Dreizler, S. J. Pollock, T. T. S. Kuo, Y. Aboussir, Y. R. Shimizu   +30 more
core   +2 more sources

RPA

, 2023
This work proposes a fast solution algorithm to a fundamental data science problem, namely to identify Boolean rules in disjunctive normal form (DNF) that classify samples based on binary features. The algorithm is an explainable machine learning method: it provides an explicit input-output relationship.
de Vos, Wout, Balvert, Marleen
openaire   +1 more source

Probing Correlated Ground States with Microscopic Optical Model for Nucleon Scattering off Doubly-Closed-Shell Nuclei

, 2005
The RPA long range correlations are known to play a significant role in understanding the depletion of single particle-hole states observed in (e, e') and (e, e'p) measurements.
C. Mahaux, D. A. Hutcheon, D. Gogny, D. Gogny, E. Bauge, F. Villars, H. V. von Geramb, I. Sick, J. P. Delaroche, K. Amos, M. Dupuis, P. Ring, P. Schwandt, S. Karataglidis, W. Love   +14 more
core   +1 more source

Consequences of self-consistency violations in Hartree-Fock random-phase approximation calculations of the nuclear breathing mode energy [PDF]

, 2004
We provide for the first time accurate assessments of the consequences of violations of self-consistency in the Hartree-Fock based random phase approximation (RPA) as commonly used to calculate the energy $E_c$ of the nuclear breathing mode.
A. Bohr, B. K. Agrawal, P. G. Reinhard, S. Shlomo   +3 more
core   +3 more sources

RPA vs. exact shell-model correlation energies

, 2002
The random phase approximation (RPA) builds in correlations left out by mean-field theory. In full 0-hbar-omega shell-model spaces we calculate the Hartree-Fock + RPA binding energy, and compare it to exact diagonalization. We find that in general HF+RPA
A. Klein, A. Poves, B.H. Wildenthal, Calvin W. Johnson, D.J. Rowe, E.R. Marshalek, F. Tondeur, G.F. Bertsch, H. Kamada, H.J. Lipkin, Ionel Stetcu, J.C. Parikh, K. Hagino, K. Hagino, N. Dinh Dang, N. Ullah, P. Möller, P. Navratil, P. Navratil, P. Schuck, R.B. Wiringa, R.M. Dreizler, T.T.S. Kuo, W.E. Ormand, Y. Aboussir, Y.R. Shimizu   +25 more
core   +1 more source

Discovery and Targeted Proteomic Studies Reveal Striatal Markers Validated for Huntington's Disease

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Clinical trials for Huntington's disease (HD) enrolling persons before clinical motor diagnosis (CMD) lack validated biomarkers. This study aimed to conduct an unbiased discovery analysis and a targeted examination of proteomic biomarkers scrutinized by clinical validation. Methods Cerebrospinal fluid was obtained from PREDICT‐HD and
Daniel Chelsky, Cara Joyce, H. Jeremy Bockholt, Paul A. Rudnick, William H. Adams, Fiona McAllister, Justin W. Smock, Michael A. Newton, Jane S. Paulsen   +8 more
wiley   +1 more source

Model-mapped RPA for determining the effective Coulomb interaction

, 2017
We present a new method to obtain interaction part of a model Hamiltonian from the result of the first-principles calculation. The effective interaction contained in the model is determined based on the random phase approximation (RPA).
Han, Myung Joon, Jang, Seung Woo, Kino, Hiori, Kotani, Takao, Kuroki, Kazuhiko, Sakakibara, Hirofumi   +5 more
core   +1 more source

Association of CDKN2A/B Homozygous Deletion and Extent of Resection With Survival of Patients With WHO CNS5 Grade 4 Astrocytoma

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objectives WHO grade 4 astrocytomas are associated with poor prognosis, and their prognostic factors remain controversial. This study aimed to identify the prognostic factors and develop a management algorithm for these patients. Methods This study retrospectively included 151 CNS5 adult grade 4 astrocytomas from two medical centers.
Jiawei Cai, Guanglin Zhu, Qiu He, Chen Luo, Lingyun Zhuo, Xingfu Wang, Yiming Chen, Xiaoyong Chen, Wendong You, Jiaheng Xu, Yuanxiang Lin, Dezhi Kang, Shuai Wu, Zanyi Wu   +13 more
wiley   +1 more source

Random-phase-approximation-based correlation energy functionals: Benchmark results for atoms

, 2007
The random phase approximation (RPA) for the correlation energy functional of density functional theory has recently attracted renewed interest. Formulated in terms of the Kohn-Sham (KS) orbitals and eigenvalues, it promises to resolve some of the ...
Eberhard Engel, Fetter A. L., Hong Jiang, Parr R. G.   +3 more
core   +1 more source

Universal Electronic‐Structure Relationship Governing Intrinsic Magnetic Properties in Permanent Magnets

Advanced Functional Materials, EarlyView.
Permanent magnets derive their extraordinary strength from deep, universal electronic‐structure principles that control magnetization, anisotropy, and intrinsic performance. This work uncovers those governing rules, examines modern modeling and AI‐driven discovery methods, identifies critical bottlenecks, and reveals electronic fingerprints shared ...
Prashant Singh
wiley   +1 more source