Enhancing fiber atom interferometer by in-fiber laser cooling
Journal
Physical Review Research
Journal Volume
4
Journal Issue
2
Start Page
L022058
ISSN
2643-1564
Date Issued
2022-06-13
Author(s)
Shijie Chai
Thomas Billotte
Zilong Chen
Mingjie Xin
Wui Seng Leong
Foued Amrani
Benoit Debord
Fetah Benabid
Abstract
We demonstrate an inertia sensitive atom interferometer optically guided inside a 22-cm-long negative curvature hollow-core photonic crystal fiber with an interferometer time of 20 ms. The result improves the previous fiber guided atom interferometer sensitivity by three orders of magnitude. The improvement arises from the realization of in-fiber Λ-enhanced gray molasses and delta-kick cooling to cool atoms from 32μK to below 1μK in 4 ms. The in-fiber cooling overcomes the inevitable heating during the atom loading process and allows a shallow guiding optical potential to minimize decoherence. Our results permit bringing atoms close to source fields for sensing and could lead to compact inertial quantum sensors with a submillimeter resolution.
Publisher
American Physical Society (APS)
Type
journal article