2009/03/04 by Bogdan Mihaila, B. Mihaila, Andres Cardenas +1 · 1 citation
Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #Curse of dimensionality #Energy (signal processing) #Excitation #Fermion #Limit (mathematics) #Physics of Superconductivity and Magnetism #Quantum many-body systems #Spectrum (functional analysis) #cond-mat.str-el #hep-ph #nucl-th
paper · pdf · doi:10.1080/14786430802676437
published in The Philosophical Magazine A Journal of Theoretical Experimental and Applied Physics 89(22-24), 1975-1987 (Taylor & Francis) · 7 figures
openalex publication_date 2009/03/04 · arxiv created 2009/03/16 · arxiv updated 2015/05/13 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We study the ground-state properties of a dilute gas of strongly-interacting fermions in the framework of the coupled-cluster expansion (CCE). We demonstrate that properties such as universality, opening of a gap in the excitation spectrum and applicability of s-wave approximations appear naturally in the CCE approach. In the zero-density limit, we show that the ground-state energy density depends on only one parameter, which in turn may depend at most on the spatial dimensionality of the system.