Condensation Energy of a Spin-1/2 Strongly Interacting Fermi Gas
Quantum Gases
2015-06-15 v1
Abstract
We report a measurement of the condensation energy of a two-component Fermi gas with tunable interactions. From the equation of state of the gas, we infer the properties of the normal phase in the zero-temperature limit. By comparing the pressure of the normal phase at T=0 to that of the low-temperature superfluid phase, we deduce the condensation energy, i.e. the energy gain of the system in being in the superfluid rather than normal state. We compare our measurements to a ladder approximation description of the normal phase, and to a fixed node Monte-Carlo approach, finding excellent agreement. We discuss the relationship between condensation energy and pairing gap in the BEC-BCS crossover.
Keywords
Cite
@article{arxiv.1304.1661,
title = {Condensation Energy of a Spin-1/2 Strongly Interacting Fermi Gas},
author = {Nir Navon and Sylvain Nascimbène and Xavier Leyronas and Frédéric Chevy and Christophe Salomon},
journal= {arXiv preprint arXiv:1304.1661},
year = {2015}
}
Comments
4 figures