This study was part of a larger effort called the transient dendritic solidification experiment (TDSE), which uses the well known Clapeyron effect to study transient effects in dendritic solidification. The transient behaviour was studied between well defined steady states using pressure mediated changes since it is almost impossible to study the transient behaviour during growth of a dendrite ...

We develop an algorithm to solve tridiagonal systems of linear equations, which appear in implicit finite-difference schemes partial differential equations (PDEs), being the time-dependent Schr\"{o}dinger equation (TDSE) ideal candidate benefit from it. Our N-shaped partition method optimizes implementation numerical calculation on parallel architectures, without memory size constraints. Specif...

As a step toward the full ab initio description of two-photon double ionization processes, we present finite-pulse version virtual-sequential model for polyelectronic atoms. The relies on single scattering states both neutral and ionized target system. proof principle benchmark, is applied to helium atom using newstock atomic photoionization code. results angularly integrated observables, which...

The partition of the photon energy into the subsystems of molecules determines many photon-induced chemical and physical dynamics in laser-molecule interactions. The electron-nuclear energy sharing from multiphoton ionization of molecules has been used to uncover the correlated dynamics of the electron and fragments. However, most previous studies focus on symmetric molecules. Here we study the...

We present in this paper an original ab initio Maxwell–Schrödinger model and a methodology to simulate intense ultrashort laser pulses interacting with a 3D H2 -gas in the nonlinear nonperturbative regime under and beyond Born–Oppenheimer approximation. The model we present is the first one to our knowledge (excepted in [E. Lorin, S. Chelkowski, A. Bandrauk, A Maxwell–Schrödinger model for non-...

In this work, we investigate multiphoton and optical field tunneling emission from metallic surfaces with nanoscale vacuum gaps. Using time-dependent Schrödinger equation (TDSE) simulations, find that the properties of emitted photocurrent in such systems can be greatly altered by application only a few-volt direct current (DC) bias. We when coupled expected plasmonic enhancements within nanome...

The collision of antiprotons with helium atoms is a fundamental process in many-body atomic physics which long has attracted considerable interest. Due to the negative charge of the antiproton, no electron transfer can occur which facilitates the theoretical treatment of the problem. So far, total cross sections for single and double ionization have been obtained, both experimentally and theore...

Gauge invariance was discovered in the development of classical electromagnetism and was required when the latter was formulated in terms of scalar and vector potentials. It is now considered to be a fundamental principle of nature, stating that different forms of these potentials yield the same physical description: they describe the same electromagnetic field as long as they are related to ea...

When an atom or molecule is exposed to a short intense laser pulse, electrons that were removed at an earlier time may be driven back by the oscillating electric field of the laser to recollide with the parent ion, to incur processes like high-order harmonic generation (HHG), high-energy above-threshold ionization (HATI) and nonsequential double ionization (NSDI). Over the years, a rescattering...

Intense-field ionization of the hydrogen molecular ion by linearly-polarized light is modelled by direct solution of the fixed-nuclei time-dependent Schrödinger equation and compared with recent experiments. Parallel transitions are calculated using algorithms which exploit massively parallel computers. We identify and calculate dynamic tunnelling ionization resonances that depend on laser wave...