We study the problem of an impurity in fully polarized (spin-up) low-density neutron matter with the help of an accurate quantum Monte Carlo method in conjunction with a realistic nucleon-nucleon interaction derived from chiral effective field theory at next-to-next-to leading order. Our calculations show that the behavior of the proton spin-down impurity is very similar to that of a polaron in a fully polarized unitary Fermi gas. We show that our results can be used to put tight constraints on the time-odd parts of the Skyrme energy density functional, independent of the time-even parts, in the density regime relevant to neutron-rich nuclei and compact astrophysical objects such as neutron stars and supernovae.

Constraining the Skyrme energy density functional with quantum Monte Carlo calculations / Roggero, Alessandro; Mukherjee, Abhishek; Pederiva, Francesco. - In: PHYSICAL REVIEW. C, NUCLEAR PHYSICS. - ISSN 0556-2813. - 92:(2015), pp. 054303.1-054303.5. [10.1103/PhysRevC.92.054303]

Constraining the Skyrme energy density functional with quantum Monte Carlo calculations

Roggero, Alessandro;Pederiva, Francesco
2015

Abstract

We study the problem of an impurity in fully polarized (spin-up) low-density neutron matter with the help of an accurate quantum Monte Carlo method in conjunction with a realistic nucleon-nucleon interaction derived from chiral effective field theory at next-to-next-to leading order. Our calculations show that the behavior of the proton spin-down impurity is very similar to that of a polaron in a fully polarized unitary Fermi gas. We show that our results can be used to put tight constraints on the time-odd parts of the Skyrme energy density functional, independent of the time-even parts, in the density regime relevant to neutron-rich nuclei and compact astrophysical objects such as neutron stars and supernovae.
Roggero, Alessandro; Mukherjee, Abhishek; Pederiva, Francesco
Constraining the Skyrme energy density functional with quantum Monte Carlo calculations / Roggero, Alessandro; Mukherjee, Abhishek; Pederiva, Francesco. - In: PHYSICAL REVIEW. C, NUCLEAR PHYSICS. - ISSN 0556-2813. - 92:(2015), pp. 054303.1-054303.5. [10.1103/PhysRevC.92.054303]
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11572/319354
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