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Microparticle Manipulation by Standing Surface Acoustic Waves with Dual-frequency Excitations

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Excited State Specific Multi-Slater Jastrow Wave Functions.

Sergio D Pineda Flores¹, Eric Neuscamman^1,2

¹Department of Chemistry , University of California , Berkeley , California 94720 , United States.

The Journal of Physical Chemistry. A

|February 1, 2019

Summary

This summary is machine-generated.

This study introduces a new computational method for accurately calculating excited states in molecules. The approach optimizes wave function approximations for individual states, achieving high accuracy even for challenging systems.

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Area of Science:

Quantum Chemistry
Computational Physics
Theoretical Chemistry

Background:

Calculating electronic excited states is crucial for understanding molecular properties and reactions.
Traditional methods often struggle with accuracy, especially for systems with complex electronic structures.
State-averaged approaches can lead to compromises, limiting precision for individual electronic states.

Purpose of the Study:

To develop a novel computational method for accurate excited state calculations.
To overcome limitations of state-averaged methods by optimizing for individual electronic states.
To improve the accuracy of excitation energies, particularly for challenging molecular systems.

Main Methods:

Combining advances in excited state variational principles, fast multi-Slater Jastrow methods, and selective configuration interaction.
Developing multi-Slater Jastrow wave function approximations optimized for individual excited states.
Incorporating state-specific orbital relaxations and variance matching for balanced approximation quality.

Main Results:

Achieved accurate excitation energies with modest multi-Slater expansions.
Demonstrated the method's effectiveness on a difficult chlorine-anion-to-π* charge transfer system.
Showcased improved accuracy compared to traditional state-averaged multireference methods.

Conclusions:

The proposed state-specific optimization approach provides accurate excitation energies.
This method offers a significant improvement for challenging electronic structure problems.
The technique is robust even when dealing with states requiring drastically different orbital relaxations.