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Direct production of fermionic superfluids in a cavity-enhanced optical dipole trap
by Tabea Bühler, Timo Zwettler, Gaia Bolognini, Aurélien Fabre, Victor Helson, Giulia Del Pace, Jean-Philippe Brantut
Submission summary
Authors (as registered SciPost users): | Tabea Bühler |
Submission information | |
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Preprint Link: | https://arxiv.org/abs/2411.05694v1 (pdf) |
Data repository: | https://zenodo.org/records/14051599 |
Date submitted: | 2024-11-11 18:27 |
Submitted by: | Bühler, Tabea |
Submitted to: | SciPost Physics |
Ontological classification | |
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Academic field: | Physics |
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Approach: | Experimental |
Abstract
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-P\'erot 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 is similar to that of a running wave dipole trap. Our system enables the optical production of ultracold samples using a total trap-laser power below $1$ W, leveraging the benefits of optical resonators as dipole traps in quantum gas research while maintaining a simple resonator design and minimizing additional experimental complexity.
Author indications on fulfilling journal expectations
- Provide a novel and synergetic link between different research areas.
- Open a new pathway in an existing or a new research direction, with clear potential for multi-pronged follow-up work
- Detail a groundbreaking theoretical/experimental/computational discovery
- Present a breakthrough on a previously-identified and long-standing research stumbling block