A phenomenological approach to the equation of state of a unitary Fermi gas
arXiv:1302.6316 · doi:10.1007/s12043-014-0749-y
Abstract
We propose a phenomenological approach for the equation of state of a unitary Fermi gas. The universal equation of state is parametrised in terms of Fermi-Dirac integrals. This reproduces the experimental data over the accessible range of fugacity and normalised temperature, but cannot describe the superfluid phase transition found in the MIT experiment \cite{ku}. The most sensitive data for compressibility and specific heat at phase transition can, however, befitted by introducing into the grand partition function a pair of complex conjugate zeros lying in the complex fugacity plane slightly off the real axis.
LaTeX file (revtex-4-1), 10 pp., 4 figures (7 *.eps files), final version to be published in Pramana
References in corpus (5)
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