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Continuum Electronic States: The Tiresia Code.

Piero Decleva1,2, Mauro Stener1,2, Daniele Toffoli2

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Summary
This summary is machine-generated.

This study introduces a new computational method using a localized (LCAO) B-spline basis for accurate electronic structure calculations. This approach efficiently describes photoionization in complex systems under various light conditions.

Keywords:
electronic continuum statesmolecular photoionizationtheoretical chemistry

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Area of Science:

  • Computational chemistry
  • Quantum mechanics
  • Electronic structure theory

Background:

  • Accurate calculation of electronic continuum states and wavepacket propagation is crucial for understanding molecular processes.
  • Existing methods may face challenges in computational efficiency and accuracy for complex systems.

Purpose of the Study:

  • To present a detailed description of a multicenter (LCAO) B-spline basis set.
  • To demonstrate its capability in providing convergent solutions for electronic continuum states and wavepacket propagation.
  • To showcase its application in accurate and efficient photoionization property calculations.

Main Methods:

  • Implementation of a multicenter (LCAO) B-spline basis within the Tiresia code.
  • Utilization of static-DFT and TDDFT Hamiltonians.
  • Inclusion of electron correlation in bound states via single-channel Dyson-DFT and Dyson-TDDFT descriptions.

Main Results:

  • The developed basis set provides convergent solutions for electronic continuum states.
  • Wavepacket propagation is accurately described.
  • The Tiresia code, incorporating these methods, offers efficient and accurate descriptions of photoionization properties for complex systems.
  • Successful application to both single-photon and strong-field photoionization scenarios.

Conclusions:

  • The multicenter (LCAO) B-spline basis set is a powerful tool for electronic structure calculations.
  • The Tiresia code provides a computationally efficient and accurate approach for studying photoionization properties.
  • This methodology is applicable to a wide range of complex systems and electromagnetic field conditions.