Many-body wavefunctions for normal liquid $^3$He

Details Many-body wavefunctions for normal liquid $^3$He Many-body wavefunctions for normal liquid $^3$He

2006-05-22

arxiv.org/abs/cond-mat/0605513v2

Phys. Rev. B 74, 104510 (2006)

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages

Scientific paper

10.1103/PhysRevB.74.104510

We present new trial wave-functions which include 3-body correlations into the backflow coordinates and a 4-body symmetric potential. We show that our wavefunctions lower the energy enough to stabilize the ground state energies of normal liquid $^3$He in the unpolarized state at all pressures in agreement with experiment; however, quantitative discrepancies remain. Further, we include strong spin coupling into the Fermi liquid by adapting pairing wave functions. We demonstrate a new, numerically stable method to evaluate pairing functions which is also useful for Path Integrals calculations at low, but non-zero temperatures.

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