QFS2016 Book of Abstracts

Abstracts

P4.28 Strong coupling effects on specific heat of a Fermi gas with a p-wave interaction Daisuke Inotani, Pieter van Wyk, and Yoji Ohashi Keio University, Faculty of Science and Technology, Department of Physics, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan Including pairing fluctuations within a strong-coupling theory, we theoretically investigate strong coupling effects on the specific heat at constant volume CV of a Fermi gas with a p-wave interaction above the superfluid transition temperature T c . We show thatCV is sensitive to the formation and the dissociation of preformed p-wave Cooper pairs. From the temperature dependence of CV, we determine a characteristic temperature, below which p-wave pairing fluctuations are remarkable. Since the appearance of preformed Cooper pairs is a precursor of the superfluid phase transition, the measurement of CV would be useful to estimate how the current experiment is close to T c . P4.29 One-dimensional soft particles with zero scattering length: from the Tonks-Girardeau gas to a high-density compressible fluid. Teruzzi Martina(1), Galli Davide Emilio(2), Pini Davide Enrico(2), Bertaina Gianluca(2) 1) SISSA-International School for Advanced Studies, Via Bonomea 265, I-34136 Trieste, Italy 2) Universit`a degli Studi di Milano, Dipartimento di Fisica, via Celoria 16, I-20133 Milano, Italy We study the equation of state and the dynamical structure factor of zero-temperature bosons interacting via a soft-shoulder potential in pure 1D, by using quantum Monte Carlo and analytic continuation techniques. The interaction is tuned to zero scattering length, which, in the limit of low density, corresponds to the Tonks-Girardeau limit and maps to the Ideal Fermi gas. By increasing the density, the system becomes relatively more compressible, albeit manifesting features typical of a precursor of a cluster phase. Our findings should be relevant for dressed Rydberg gases.

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