An analysis of variational wave function for the pairing problem in strongly correlated system

An analysis of variational wave function for the pairing problem in strongly correlated system

We report a theoretical analysis of variational wave functions for the BCS pairing problem. Starting with a Jastrow-Feenberg (or, in a more recent language "fixed-node") wave function for the superfluid state, we develop the full optimized Fermi-Hypernetted Chain (FHNC-EL) equations which...

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Veröffentlicht in:Journal of physics. Conference series 2018-06, Vol.1041 (1), p.12010
Hauptverfasser: Fan, H.-H., Krotscheck, E.
Format: Artikel
Sprache:eng
Schlagworte:
Approximation
Fluids
Helium
Mathematical analysis
Physics
Superfluidity
Wave functions
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Zusammenfassung:We report a theoretical analysis of variational wave functions for the BCS pairing problem. Starting with a Jastrow-Feenberg (or, in a more recent language "fixed-node") wave function for the superfluid state, we develop the full optimized Fermi-Hypernetted Chain (FHNC-EL) equations which sum a local approximation of the parquet-diagrams. Close examination of the procedure reveals that it is essential to go beyond the usual Jastrow-Feenberg approximation to guarantee the correct stability range.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/1041/1/012010