Abstract
The influence of correlations on the critical temperature and density for the onset of superfluidity in nuclear matter is investigated within the scheme of Nozières and Schmitt-Rink [1]. For symmetric nuclear matter a smooth transition from Bose-Einstein condensation (BEC) of deuteronlike bound states at low densities and low temperatures to Bardeen-Cooper-Schrieffer (BCS) pairing at higher densities is described. Compared with the mean field approach a lowering of the critical temperature is obtained for symmetric nuclear matter as well as for pure neutron matter. The Mott transition in symmetric nuclear matter is discussed. Regions in the temperature-density plane are identified where correlated pairs give the main contribution to the composition of the system, so that approximations beyond the quasi-particle picture are requested.
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Stein, H., Schnell, A., Alm, T. et al. Correlations and pairing in nuclear matter within the Nozières-Schmitt-Rink approach. Z. Physik A - Hadrons and Nuclei 351, 295–299 (1995). https://doi.org/10.1007/BF01290911
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DOI: https://doi.org/10.1007/BF01290911