Cooling dynamics of ultracold two-species Fermi-Bose mixtures.
We compare strategies for evaporative and sympathetic cooling of two-species Fermi-Bose mixtures in single-color and two-color optical dipole traps. We show that in the latter case a large heat capacity of the bosonic species can be maintained during the entire cooling process. This could allow one to efficiently achieve a deep Fermi degeneracy regime having at the same time a significant thermal fraction for the Bose gas, crucial for a precise thermometry of the mixture. Two possible signatures of a superfluid phase transition for the Fermi species are discussed.
Presilla
Carlo
C
Dipartimento di Fisica, Università di Roma La Sapienza, Piazzale Aldo Moro 2, Roma 00185, Italy.
Onofrio
Roberto
R