# RMT: R-matrix with time-dependence. Solving the semi-relativistic, time-dependent Schrodinger equation for general, multi-electron atoms and molecules in intense, ultrashort, arbitrarily polarized laser pulses

## TL;DR

The paper introduces RMT, a computational program that accurately models the interaction of multi-electron atoms and molecules with intense, ultrashort laser pulses, capturing complex electron dynamics and relativistic effects.

## Contribution

It presents a new, versatile simulation tool capable of handling general multi-electron systems under complex laser interactions with full correlation effects.

## Key findings

- Successfully models ionization and recollision processes.
- Includes relativistic spin-orbit effects in atomic calculations.
- Handles arbitrary laser polarization and ultrashort pulses.

## Abstract

RMT is a program which solves the time-dependent Schrodinger equation for general, multielectron atoms, ions and molecules interacting with laser light. As such it can be used to model ionization (single-photon, multi-photon and strong-field), recollision (high-harmonic generation, strong-field rescattering), and more generally absorption or scattering processes with a full account of the multielectron correlation effects in a time-dependent manner. Calculations can be performed for targets interacting with ultrashort, intense laser pulses of long-wavelength and arbitrary polarization. Calculations for atoms can optionally include the Breit-Pauli correction terms for the description of relativistic (in particular, spin-orbit) effects.