Strongly paired fermions: Cold atoms and neutron matter

By A. Gezerlis, J. Carlson. 2007

146 citations recorded by the source corpus.

Experiments with cold Fermi atoms can be tuned to probe strongly-interacting fluids that are very similar to the low-density neutron matter found in the crusts of neutron stars. In contrast to traditional superfluids and superconductors, matter in this regime is very strongly paired, with gaps of the order of the Fermi energy. We compute the $T=0$ equation of state and pairing gap for cold atoms and low-density neutron matter as a function of the Fermi momentum times the scattering length. Results of quantum Monte Carlo calculations show that the equations of state are very similar. The neutron matter pairing gap at low densities is found to be very large but, except at the smallest densities, significantly suppressed relative to cold atoms because of the finite effective range in the neutron-neutron interaction.

Subfields: Astronomy and Astrophysics, Atomic and Molecular Physics, and Optics

View Paper: https://www.semanticscholar.org/paper/fd17a6c9914a9c76ee28d6cd8a80e4a1cfb1b586

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In Astronomy and Astrophysics

In Atomic and Molecular Physics, and Optics

Citations in the corpus

Superfluidity in nuclear systems and neutron stars (2018, methodology): “More recent GFMC computations [231, 233] predict gaps which are about 30% smaller than those obtained with AFDMC.”
Theory of ultracold atomic Fermi gases (2007, background): “Bertsch (1999) and Baker (1999) first discussed the unitary regime as a model for neutron matter based on resonance effects in the neutron-neutron scattering amplitude (for a recent comparison between cold atoms and neutron matter see Gezerlis and Carlson, 2007).”