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arXiv · 1801.10196

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

Hsuan-Hao Fan·E. Krotscheck
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Abstract

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.

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Hsuan-Hao Fan, E. Krotscheck. 2018-01-30. An analysis of variational wave function for the pairing problem in strongly correlated system. https://doi.org/10.1088/1742-6596%2F1041%2F1%2F012010

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