2013/08/31 by S. Ramanan, M. Urban, Michael Urban · 22 citations
Chemistry · Mathematics · Physics and Astronomy · #Chemistry #Cold Atom Physics and Bose-Einstein Condensates #Computer science #Condensed matter physics #Crossover #Diagonal #Effective field theory #Mathematics #Momentum (technical analysis) #Neutron #Nuclear matter #Nuclear physics #Nucleon #Operator (biology) #Physics #Pulsars and Gravitational Waves Research #Quantum electrodynamics #Quantum mechanics #Quantum, superfluid, helium dynamics #Renormalization #Renormalization group #Statistical physics #cond-mat.quant-gas #cond-mat.str-el #nucl-th
paper · pdf · doi:10.1103/physrevc.88.054315
published in Physical Review C 88(5) (American Institute of Physics) · 10 pages and 8 figures, Figs 6 and 7 now includes higher cut-offs, discussion of the cut-off dependence improved, new Summary and Outlook section and new references added
arxiv created 2013/11/07 · openalex publication_date 2013/11/18 · arxiv updated 2013/12/10 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We study pure neutron matter in the BEC-BCS crossover regime using renormalization-group-based low-momentum interactions within the Nozi\`eres-Schmitt-Rink framework. This is an attempt to go beyond the mean-field description for low-density matter. We work in the basis of so-called Weinberg eigenvectors where the operator G0V is diagonal, which proves to be an excellent choice that allows one to use nonlocal interactions in a very convenient way. We study the importance of correlations as a function of density. We notice that there is a significant reduction of the BCS critical temperature at low densities as the neutron matter approaches the unitary limit.