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arXiv · 0805.2513

Equation of state of superfluid neutron matter and the calculation of $^1S_0$ pairing gap

S. Gandolfi·A. Yu. Illarionov·S. Fantoni·F. Pederiva·K. E. Schmidt
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Abstract

We present a Quantum Monte Carlo study of the zero temperature equation of state of neutron matter and the computation of the $^1S_0$ pairing gap in the low-density regime with $ρ<0.04$ fm$^{-3}$. The system is described by a non-relativistic nuclear Hamiltonian including both two-- and three--nucleon interactions of the Argonne and Urbana type. This model interaction provides very accurate results in the calculation of the binding energy of light nuclei. A suppression of the gap with respect to the pure BCS theory is found, but sensibly weaker than in other works that attempt to include polarization effects in an approximate way.

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S. Gandolfi, A. Yu. Illarionov, S. Fantoni, F. Pederiva, K. E. Schmidt. 2008-05-16. Equation of state of superfluid neutron matter and the calculation of $^1S_0$ pairing gap. https://doi.org/10.1103/physrevlett.101.132501

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