Rostock 2019 – scientific programme

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A: Fachverband Atomphysik

A 26: Atomic systems in external fields

A 26.2: Poster

Wednesday, March 13, 2019, 16:15–18:15, S Fobau Physik

QPROP 3.0: an improved t-SURFF 2.0 algorithm for a trusted Schrödinger solver — •Vasily Tulsky and Dieter Bauer — University of Rostock, Rostock, Germany

Solving the time-dependent Schrödinger equation (TDSE) for an atom in a strong laser field is often a delicate problem and requires numerical methods to obtain accurate results. In the particular case of calculating photoelectron spectra (PES) the t-SURFF method [1] is efficiently applied, allowing to significantly reduce the size of the numerical grid. This poster is devoted to our TDSE solver named QPROP [2-3] and the fresh improvement to its t-SURFF part.

Once the ionizing laser pulse is over, the propagation of the wavefunction is determined by a time-independent Hamiltonian. This allows to analytically obtain the contribution to the surface flux after the pulse [4], covering the infinite time interval in a single step, significantly speeding up the calculation of the PES and allowing to exactly reproduce even its low-energy domain.

[1] L. Tao, A. Scrinzi, New Journal of Physics 14, 013021 (2012).

[2] D. Bauer, P. Koval, Computer Physics Communications 174, 396 (2006).

[3] V. Mosert and D. Bauer, Computer Physics Communications 207, 452 (2016).

[4] F. Morales, T. Bredtmann, S. Patchkovskii, J. Phys. B 49, 245001 (2016).