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

. 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

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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