Equation of state of superfluid neutron matter and the calculation of the 1S0 pairing gap.
We present a quantum Monte Carlo study of the zero-temperature equation of state of neutron matter and the computation of the 1S0 pairing gap in the low-density regime with rho < 0.04 fm(-3). The system is described by a nonrelativistic 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.
S.I.S.S.A., International School of Advanced Studies, via Beirut 2/4, 34014 Trieste, Italy.
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S
Gandolfi
A Yu
AY
Illarionov
S
S
Fantoni
F
F
Pederiva
K E
KE
Schmidt