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Related Experiment Video

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An open-source framework for analyzing N-electron dynamics. I. Multideterminantal wave functions.

Vincent Pohl1, Gunter Hermann1, Jean Christophe Tremblay1

  • 1Institut für Chemie und Biochemie, Freie Universität Berlin, Takustraße 3, Berlin, 14195, Germany.

Journal of Computational Chemistry
|April 25, 2017
PubMed
Summary
This summary is machine-generated.

This study introduces detCI@ORBKIT, a Python tool for analyzing electron dynamics in molecules. It visualizes correlated many-electron dynamics and electronic flux density for ultrafast charge migration processes.

Keywords:
Slater-Condon rulescorrelated electron dynamicselectron densityelectronic current densityelectronic difference densityelectronic flux densitymultideterminantal wave function

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Area of Science:

  • Quantum Chemistry
  • Computational Physics
  • Molecular Dynamics

Background:

  • Analyzing correlated many-electron dynamics is crucial for understanding molecular systems.
  • Existing methods require specialized tools for visualizing electronic wave packet evolution.

Purpose of the Study:

  • To develop a framework for analyzing and visualizing correlated many-electron dynamics.
  • To introduce a general tool for post-processing multideterminant configuration-interaction wave functions.

Main Methods:

  • Representing electronic wave packets as linear combinations of N-electron wave functions.
  • Computing electronic flux density using Slater-Condon rules.
  • Implementing the procedure in the open-source Python program detCI@ORBKIT.

Main Results:

  • The detCI@ORBKIT tool extracts data from standard quantum chemistry packages.
  • Demonstrated applicability to ultrafast charge migration processes in various molecular systems.
  • Investigated convergence of N-electron dynamics with respect to theory level and basis set size.

Conclusions:

  • The developed tool provides a robust method for analyzing electron dynamics.
  • Assesses the reliability of dynamical features observed in charge migration simulations.
  • Facilitates deeper insights into transient electronic density and phase evolution.