Collisional Properties ofp-Wave Feshbach Molecules

Abstract

We have observed p-wave Feshbach molecules for all three combinations of the two lowest hyperfine spin states of 6Li. By creating a pure molecular sample in an optical trap, we measured the inelastic collision rates of p-wave molecules. We have also measured the elastic collision rate from the thermalization rate of a breathing mode which was excited spontaneously upon molecular formation.

Charge-exchange collisions between ultracold fermionic lithium atoms and calcium ions

“…The ion temperature under optimum conditions is expected to be less than 3 mK, based on estimations using the Doppler broadening of the ion fluorescence spectra during scanning over a range of cooling laser frequencies [12]. 6 Li atoms are captured in a magneto-optical trap and subsequently transferred into an optical trap having a relatively large volume and depth (∼1 mK), created with an enhanced light field using an optical resonator [13,14]. These atoms are subsequently transferred into a tightly focused dipole trap and transported to the vicinity of the ion trap electrodes by translational motion of the focusing lens of the trap laser, and mixed with the ions.…”

BCS-BEC crossover and nodal-points contribution in p-wave resonance superfluids

“…In the first experiments on p-wave Feshbach resonance the experimentalists measure the molecule formation in the ultracold fermionic gas of 6 Li-atoms close to resonance magnetic field B 0 [1,2]. In the last years the analogous experiments on p-wave molecules formation in spin-polarized fermionic gas of 40 K-atoms were started [3].…”

“…In the last years the analogous experiments on p-wave molecules formation in spin-polarized fermionic gas of 40 K-atoms were started [3]. The lifetime of p-wave molecules is rather short yet [1][2][3]. However the physicists working in ultracold gases have started intensively to study the huge bulk of experimental and theoretical wisdom accumulated in the physics of superfluid 3 He in 1970-s-1980-s (see [11]).…”

“…The first experimental results on p-wave Feshbach resonance [1][2][3] in ultracold fermionic gases 40 K and 6 Li make the field of quantum gases closer to the interesting physics of superfluid 3 He and the physics of unconventional superconductors such as Sr 2 RuO 4 . In this context it is important to try to build the bridge between the physics of ultracold gases and the physics of quantum liquids and to enrich both communities with the experience and knowledge accumulated in each of these fields.…”

Engineering p-wave interactions in ultracold atoms using nanoplasmonic traps

“…In the field of quantum gases, strong p-wave interaction can in principle be achieved by using Feshbach resonances. Because of the inelastic loss processes, however, a strong p-wave interaction is hard to achieve experimentally [20][21][22] . Moreover, in Bose-Fermi mixtures, density fluctuations of bosons can induce attractive p-wave interactions or even higher partial waves between the fermions [23][24][25] .…”