# SPEEDUP Code for Calculation of Transition Amplitudes via the Effective Action Approach

@article{Bala2012SPEEDUPCF, title={SPEEDUP Code for Calculation of Transition Amplitudes via the Effective Action Approach}, author={Antun Bala{\vz} and Ivana Vidanovic and Danica Stojiljkovic and Dusan Vudragovic and Aleksandar Belic and Aleksandar Bogojevic}, journal={Communications in Computational Physics}, year={2012}, volume={11}, pages={739-755} }

We present Path Integral Monte Carlo C code for calculation of quantum mechanical transition amplitudes for 1D models. The SPEEDUP C code is based on the use of higher-order short-time effectiveactions and implemented to the maximal order p=18 in the time of propagation (Monte Carlo time step), which substantially improves the convergence of discretized amplitudes to their exact continuum values. Symbolic derivation of higher-order effective actions is implemented in SPEEDUP Mathematica codes…

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