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Updated: Jul 16, 2026

Measurement of the Directional Information Flow in fNIRS-Hyperscanning Data using the Partial Wavelet Transform Coherence Method
Published on: September 3, 2021
From Wave Function Sign Structure to Static Correlation
1Department of Physics, Faculty of Science, University of Ostrava, 30. dubna 22, 701 03Ostrava, Czech Republic.
Abstract:
We define a variational nodal partition of correlation energy, Ecor = Esym + Estat, relative to a mean-field baseline and its single-determinant (SD) node. Estat is the component associated with replacing the exact node with the SD one, isolating Fermionic sign-structure correlation. The complement contains dynamic and strong nodeless correlation. Thus, three state-based components naturally emerge, clarifying dynamic, strong, nondynamic, and static correlation. Additionally, previous nodal decompositions and SD fixed-node diffusion Monte Carlo successes and failures become transparent.
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