# Welcome to udkm1Dsim documentation!¶

The udkm1Dsim toolbox is a collection of Python classes and routines to simulate the thermal, structural, and magnetic dynamics after laser excitation as well as the according X-ray scattering response in one-dimensional sample structures after ultrafast excitation.

The toolbox provides the capabilities to define arbitrary layered structures on the atomic level including a rich database of element-specific physical properties. The excitation of ultrafast dynamics is represented by an N-temperature-model which is commonly applied for ultrafast optical excitations. Structural dynamics due to thermal stresses are calculated by a linear-chain model of masses and springs. The implementation of magnetic dynamics can be easily accomplished by the user for the individual problem.

The resulting X-ray diffraction response is computed by kinematical or dynamical X-ray theory which can also include magnetic scattering.

The udkm1Dsim toolbox is highly modular and allows to introduce user-defined results at any step in the simulation procedure.

The udkm1Dsim toolbox was initially developed for MATLAB® in the Ultrafast Dynamics in Condensed Matter group of Prof. Matias Bargheer at the University of Potsdam, Germany. The MATLAB® source code is still available at https://github.com/dschick/udkm1DsimML.

The current toolbox, written in Python, is maintained by Daniel Schick at the Max-Born-Institute, Berlin, Germany.

# Citation¶

Please cite the original publication if you use the udkm1Dsim toolbox for your own publications:

D. Schick, A. Bojahr, M. Herzog, R. Shayduk, C. von Korff Schmising & M. Bargheer, udkm1Dsim - A Simulation Toolkit for 1D Ultrafast Dynamics in Condensed Matter, Comput. Phys. Commun. 185, 651 (2014) (preprint).

# Installation¶

You can either install directly from pypi.org using the command

pip install udkm1Dsim


or if you want to work on the latest develop release you can clone udkm1Dsim from the main git repository:

git clone https://github.com/dschick/udkm1Dsim.git udkm1Dsim


To work in editable mode (source is only linked but not copied to the python site-packages), just do:

pip install -e ./udkm1Dsim


Or to do a normal install with

pip install ./udkm1Dsim


You can have the following optional installation to enable parallel computations, unit tests, as well as building the documentation:

pip install udkm1Dsim[parallel]
pip install udkm1Dsim[testing]
pip install udkm1Dsim[documentation]