Interleaved Matter-Wave Gyroscope with 3 × 10−10 rad.s−1 Stability

We present a matter-wave gyroscope with 11 cm
²
Sagnac area operating without dead times and at a sampling frequency of 3.75 Hz. This is achieved by interleaving the atom laser-cooling step and the interrogation of the atoms. We demonstrate a record short term sensitivity of 30 nrad.s-
¹
. Hz-
¹
/
²
, which allows us to characterize and stabilize systematic effects below 3×10
^-10
rad.s
^-1
after 15 000 seconds of integration time. Such level of stability competes with best long term stabilities obtained with fiber-optics gyroscopes, and paves the way for applications of cold-atom sensors in inertial navigation or geoscience.