2013/08/31 by Michael McNeil Forbes, M. M. Forbes, A. Gezerlis +4
Physics and Astronomy · #Atomic and Subatomic Physics Research #Cold Atom Physics and Bose-Einstein Condensates #Condensed matter physics #Electron #Fermi Gamma-ray Space Telescope #Fermion #Monte Carlo method #Neutron #Nuclear physics #Nuclear physics research studies #Physics #Polaron #Quantum Monte Carlo #Quantum mechanics #cond-mat.quant-gas #nucl-th
paper · pdf · doi:10.1103/physrevc.89.041301
published as Phys. Rev. C 89, 041301(R) (2014) · 5 pages, 3 figures; v2 corresponds to the published version
openalex publication_date 2014/04/03 · arxiv created 2014/04/11 · arxiv updated 2014/04/14 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We study the energy of an impurity (polaron) that interacts strongly in a sea of fermions when the effective range of the impurity-fermion interaction becomes important, thereby mapping the Fermi polaron of condensed matter physics and ultracold atoms to strongly interacting neutrons. We present quantum Monte Carlo results for this neutron polaron, and compare these with effective field theory calculations that also include contributions beyond the effective range. We show that state-of-the-art nuclear density functionals vary substantially and generally underestimate the neutron polaron energy. Our results thus provide constraints for adjusting the time-odd components of nuclear density functionals to better characterize polarized systems.