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research article

Direct production of fermionic superfluids in a cavity-enhanced optical dipole trap

Bühler, Tabea N.C.
•
Zwettler, Timo  
•
Bolognini, Gaia S.  
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April 1, 2025
SciPost Physics

We present the production of quantum degenerate, superfluid gases of 6Li through direct evaporative cooling in a cavity-enhanced optical dipole trap. The entire evaporative cooling process is performed in a trap created by the TEM00 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 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.

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10.21468_scipostphys.18.4.133.pdf

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Main Document

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Published version

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openaccess

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CC BY

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1.02 MB

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Adobe PDF

Checksum (MD5)

910148ae9e1b1931c16f8f7091215930

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