Results 31 to 40 of about 966,659 (353)

Ground-State Properties of the Hydrogen Chain: Dimerization, Insulator-to-Metal Transition, and Magnetic Phases

Physical Review X, 2020
Accurate and predictive computations of the quantum-mechanical behavior of many interacting electrons in realistic atomic environments are critical for the theoretical design of materials with desired properties, and they require solving the grand ...
M. Motta, C. Genovese, Fengjie Ma, Z. Cui, R. Sawaya, G. Chan, Natalia Chepiga, P. Helms, C. Jiménez-Hoyos, A. Millis, Ushnish Ray, Enrico Ronca, Hao Shi, S. Sorella, E. Stoudenmire, S. White, Shiwei Zhang   +16 more
semanticscholar   +1 more source

Interpretations of ground-state symmetry breaking and strong correlation in wavefunction and density functional theories [PDF]

Proceedings of the National Academy of Sciences of the United States of America, 2020
Significance The ground state of a quantum mechanical system is the lowest-energy eigenstate of the Hamiltonian. In isolation, it persists unchanged forever, with symmetries dictated by those of the Hamiltonian.
J. Perdew, A. Ruzsinszky, Jianwei Sun, N. Nepal, Aaron D. Kaplan   +4 more
semanticscholar   +1 more source

Probing dark matter axions using the hyperfine structure splitting of hydrogen atoms

Physics Letters B, 2023
QCD axions can be a substantial part of dark matter if their mass ma∼10−5 eV. Since the axions were created by the misalignment mechanism, their local energy spectrum density is large. Consequently, the axion-induced atomic transition rate is enhanced if
Qiaoli Yang, Shiqin Dong
doaj   +1 more source

Two Flavors of Hydrogen Atoms: A Possible Explanation of Dark Matter

Atoms, 2020
In one of our previous papers, it was shown that for the ground state of hydrogenic atoms/ions, it is possible to match the interior (inside the nucleus) solution of the Dirac equation with the singular exterior solution of the Dirac equation, so that ...
Eugene Oks
doaj   +1 more source

Line shape of the muH(3p - 1s) hyperfine transitions [PDF]

, 2008
The (3p - 1s) X-ray transition to the muonic hydrogen ground state was measured with a high resolution crystal spectrometer. A Doppler effect broadening of the X-ray line was established which could be attributed to different Coulomb de-excitation steps ...
A. Gruber, A. Hirtl, D. F. Anagnostopoulos, D. Gotta, D. S. Covita, E.-O. Le Bigot, H. Gorke, J. F. C. A. Veloso, J. M. F. dos Santos, J. Zmeskal, L. Bracci, L. M. Simons, M. Nekipelov, M. Trassinelli, P. Indelicato, Ph. Schmid, T. Ishiwatari   +16 more
core   +4 more sources

Electron impact ionization of metastable 2P-state hydrogen atoms in the coplanar geometry

Results in Physics, 2015
Triple differential cross sections (TDCS) for the ionization of metastable 2P-state hydrogen atoms by electrons are calculated for various kinematic conditions in the asymmetric coplanar geometry.
S. Dhar, N. Nahar
doaj   +1 more source

Exactly Solvable Hydrogen-like Potentials and Factorization Method [PDF]

, 1998
A set of factorization energies is introduced, giving rise to a generalization of the Schr\"{o}dinger (or Infeld and Hull) factorization for the radial hydrogen-like Hamiltonian.
Alves N A, Andrianov A A, Carrol R W, Crum M M, Darboux G, Fernández D J C, Fernández D J C, Fernández D J C, Fernández D J C, Ince E L, J Oscar Rosas-Ortiz, Junker G, Junker G, Mielnik B, Mielnik B, Nag N, Rosas-Ortiz J O, Rosas-Ortiz J O, Rosas-Ortiz J O, Samsonov B F, Schrödinger E, the discussion about exactly solvable models, Wang Z X   +22 more
core   +2 more sources

Role of intramolecular hydrogen bonding in the excited-state intramolecular double proton transfer (ESIDPT) of calix[4]arene: A TDDFT study

Open Physics, 2016
The time-dependent density functional theory (TDDFT) method was performed to investigate the excited-state intramolecular double proton transfer (ESIDPT) reaction of calix[4]arene (C4A) and the role of the intramolecular hydrogen bonds in the ESIDPT ...
Wang Se, Wang Zhuang, Hao Ce
doaj   +1 more source

Interaction of Be⁴⁺ and Ground State Hydrogen Atom—Classical Treatment of the Collision

Atoms, 2020
The interaction between Be4+ and hydrogen atom is studied using the three-body classical trajectory Monte Carlo method (CTMC) and the quasiclassical trajectory Monte Carlo method of Kirschbaum and Wilets (QTMC-KW).
I. Ziaeian, K. Tőkési
doaj   +1 more source

Stress Tensor of the Hydrogen Molecular Ion [PDF]

, 2009
The electronic stress tensor of the hydrogen molecule ion H_2^+ is investigated for the ground state (sigma_g 1s) and the first excited state (sigma_u^* 1s) using their exact wave functions.
Akitomo Tachibana, Kazuhide Ichikawa, W. Pauli   +2 more
core   +2 more sources