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Exact time-dependent density-functional theory for nonperturbative dynamics of the helium atom

Journal Article · · Physical Review A
By inverting the time-dependent Kohn-Sham equation for a numerically exact dynamics of the helium atom, we show that the dynamical step and peak features of the exact correlation potential found previously in one-dimensional models persist for real three-dimensional systems. We demonstrate that the Kohn-Sham and true current-densities differ by a rotational component. The results have direct implications for approximate TDDFT calculations of atoms and molecules in strong fields, emphasizing the need to go beyond the adiabatic approximation, and highlighting caution in quantitative use of the Kohn-Sham current.
Research Organization:
Rutgers University, Piscataway, NJ (United States)
Sponsoring Organization:
USDOE Office of Science (SC); USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0020044
OSTI ID:
1853424
Alternate ID(s):
OSTI ID: 1822492
Journal Information:
Physical Review A, Journal Name: Physical Review A Journal Issue: 3 Vol. 104; ISSN 2469-9926
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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