TY  - JOUR
PB  - SciPost Foundation
DO  - 10.21468/SciPostPhys.18.4.133
TI  - Direct production of fermionic superfluids in a cavity-enhanced optical dipole trap
PY  - 2025/04/23
UR  - https://scipost.org/SciPostPhys.18.4.133
JF  - SciPost Physics
JA  - SciPost Phys.
VL  - 18
IS  - 4
SP  - 133
A1  - Bühler, Tabea
AU  - Zwettler, Timo
AU  - Bolognini, Gaia
AU  - Fabre, Aurélien
AU  - Helson, Victor
AU  - Del Pace, Giulia
AU  - Brantut, Jean-Philippe
AB  - We present the production of quantum degenerate, superfluid gases of $^6$Li through direct evaporative cooling in a cavity-enhanced optical dipole trap. The entire evaporative cooling process is performed in a trap created by the TEM$_{00}$ mode of a Fabry-Pérot cavity, simultaneously driven on several successive longitudinal modes. This leads to near-complete cancellation of the inherent lattice structure along the axial direction of the cavity, as evidenced by the observation of long-lived dipole oscillations of the atomic cloud. We demonstrate the production of molecular Bose-Einstein condensates upon adiabatic conversion of a unitary Fermi gas evaporatively cooled in this trap. The lifetime and heating in the cavity trap are similar to those in a running wave dipole trap. Our system enables the optical production of ultracold samples using a total trap-laser power below $1W$, leveraging the benefits of optical resonators as dipole traps in quantum gas research while maintaining a simple resonator design and minimizing additional experimental complexity.
ER  -

@Article{10.21468/SciPostPhys.18.4.133,
	title={{Direct production of fermionic superfluids in a cavity-enhanced optical dipole trap}},
	author={Tabea N. C. Bühler and Timo Zwettler and Gaia S. Bolognini and Aurélien H. Fabre and Victor Y. Helson and Giulia Del Pace and Jean-Philippe Brantut},
	journal={SciPost Phys.},
	volume={18},
	pages={133},
	year={2025},
	publisher={SciPost},
	doi={10.21468/SciPostPhys.18.4.133},
	url={https://scipost.org/10.21468/SciPostPhys.18.4.133},
}