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Related Experiment Video

Updated: Jul 8, 2026

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

Seniority eigenstate configuration interaction.

Thomas M Henderson^1,2, Guo P Chen¹, Gustavo E Scuseria^1,2

¹Department of Chemistry, Rice University, Houston, Texas 77005-1892, USA.

The Journal of Chemical Physics

|July 7, 2026

Summary

We introduce a new method for strongly correlated electronic systems using seniority eigenstates. This approach achieves high accuracy, rivaling or surpassing traditional zero-seniority methods for complex models.

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Area of Science:

Quantum chemistry
Computational physics
Strongly correlated electronic systems

Background:

Zero-seniority methods are effective for strongly correlated systems.
Other seniority sectors remain less explored.
Maximal and zero seniority share algebraic structures.

Purpose of the Study:

Introduce a novel seniority eigenstate configuration interaction.
Constrain wave functions to fixed local seniority.
Explore high-seniority sectors for electronic system description.

Main Methods:

Partition orbitals into seniority zero (pairing) and seniority one (spin) sets.
Construct an effective Hamiltonian for the seniority eigenstate ansatz.
Apply the method to the Hubbard model and nitrogen molecule dissociation.

Main Results:

High-seniority wave functions demonstrate excellent accuracy for strongly correlated fermionic systems.
The accuracy is competitive with or superior to seniority zero.
Effective Hamiltonian construction is demonstrated.

Conclusions:

Seniority eigenstate configuration interaction offers a powerful alternative for strongly correlated systems.
High-seniority sectors provide accurate descriptions.
The method shows promise for future computational chemistry and physics applications.