Berlin 2014 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 27: Poster: Photoionization
A 27.11: Poster
Dienstag, 18. März 2014, 16:30–18:30, Spree-Palais
Nonlinear photo-ionization dynamics using MCTHDF and Time-dependent RASCI — •Christopher Hinz1, David Hochstuhl2, and Michael Bonitz1 — 1ITAP, Christian-Albrechts-Universität Kiel, Leibnizstraße 15, 24098 Kiel — 2d-fine GmbH, Opernplatz 2, D-60313 Frankfurt
As of now, the exact simulation of correlated quantum systems is inherently limited by the exponential growth of the
state space with the particle number, and the resulting computational complexity—established as curse of dimensionality.
It is therefore necessary to use an adapted approximation to mitigate this barrier, such as by using an ansatz
for the many-particle state of the system.
To methodically understand the implications of such an ansatz, it is required to strictly quantify its structural properties
and their impact on the treated observables.
As a first benchmark, we compare the structural properties of atomic states during photo-ionization for the FCI, MCTDHF [1,3] and TD-RASCI [2,3] methods.
Particularly, we try to identify the cause of some already known deficiencies of the MCTDHF ansatz [1].
In the end, the detailed insight into the structure of these systems will allow one to guide the development of more advanced approximations.
D. Hochstuhl, and M. Bonitz, J. Chem. Phys 134(8) (2011)
D. Hochstuhl, and M. Bonitz, JPCS 427, 012007 (2013)
D. Hochstuhl, C. Hinz and M. Bonitz, EPJ ST in press