2020, Wragg, J., Benda, J., Mašín, Z., Armstrong, G.S.J., Clarke, D.D.A., Brown, A.C., Ballance, C., Harvey, A.G., Houfek, K., Sunderland, A., Plummer, M., Gorfinkiel, J.D., Van Der Hart, H.

We describe and illustrate a number of recent developments of the atomic and molecular ab initio R-matrix suites for both time-dependent calculations of ultrafast laser-induced dynamics and time-independentcalculations of photoionization and electron scattering. © 2019 Published under licence by IOP Publishing Ltd.

2016, Lazzaroni, Giuliano, Rossi, Riccarda, Thomas, Marita, Toader, Rodica

This note deals with the analysis of a model for partial damage, where the rate- independent, unidirectional flow rule for the damage variable is coupled with the rate-dependent heat equation, and with the momentum balance featuring inertia and viscosity according to Kelvin-Voigt rheology. The results presented here combine the approach from Roubicek [1, 2] with the methods from Lazzaroni/Rossi/Thomas/Toader [3]. The present analysis encompasses, differently from [2], the monotonicity in time of damage and the dependence of the viscous tensor on damage and temperature, and, unlike [3], a nonconstant heat capacity and a time-dependent Dirichlet loading.

2022-10-10, Carlström, Stefanos, Bertolino, Mattias, Dahlström, Jan Marcus, Patchkovskii, Serguei

We present a specialization of the grid-based implementation of the time-dependent configuration-interaction singles described in the preceding paper [S. Carlström et al., preceding paper, Phys. Rev. A 106, 043104 (2022)]. to the case of spherical symmetry. We describe the intricate time propagator in detail and conclude with a few example calculations. Among these, of note are high-resolution photoelectron spectra in the vicinity of the Fano resonances in photoionization of neon and spin-polarized photoelectrons from xenon, in agreement with recent experiments.

2015, Barillot, T., Magrakvelidze, M., Loriot, V., Bordas, C., Hervieux, P.-A., Gisselbrecht, M., Johnsson, P., Laksman, J., Mansson, E.P., Sorensen, S., Canton, S.E., Dahlström, J.M., Dixit, G., Madjet, M.E., Lépine, F., Chakraborty, H.S.

We perform time-dependent local density functional calculations of the time delay in C60 HOMO and HOMO-1 photoionization at giant plasmon energies. A semiclassical model is used to develop further insights.

2022-10-10, Carlström, Stefanos, Spanner, Michael, Patchkovskii, Serguei

We present a grid-based implementation of the time-dependent configuration-interaction singles method suitable for computing the strong-field ionization of small gas-phase molecules. After outlining the general equations of motion used in our treatment of this method, we present example calculations of strong-field ionization of He, LiH, H2O, and C2H4 that demonstrate the utility of our implementation. The following paper [S. Carlström et al., following paper, Phys. Rev. A 106, 042806 (2022)] specializes to the case of spherical symmetry, which is applied to various atoms.

2022, Morales, Felipe, Richter, Maria, Ivanov, Misha, Husakou, Anton

It is commonly assumed that for low-intensity short optical pulses far from resonance, the third-order optical nonlinear response is instantaneous. We solve the three-dimensional time-dependent Schrödinger equation for the hydrogen atom and show that this is not the case: the polarization is not simply proportional to the cube of the electric field even at low intensities. We analyze the fundamental-frequency and third-harmonic nonlinear susceptibilities of hydrogen, investigate their dependence on intensity, and find that the delays in the Kerr response rapidly approach the femtosecond time-scale at higher intensities, while the delays in the third harmonic generation remain much lower. We also propose an experimental scheme to detect and characterize the above effects.