Proposed fitting function for the critical Casimir force on 4He film below the point

Abstract: We have extended the mean field calculations of Zandi et al. (2007) and have obtained an approximate mathematical expression for the Casimir scaling function , which if extrapolated to the domain , becomes surprisingly similar to that obtained experimentally by Ganshin et al. (2006). The extrapolated can be regarded as a proposed fitting function, that appears to agree better with the experiments in , than the exact mean field results of Zandi et al. (2007) . [Copyright &y& Elsevier]