Blue-detuned magneto-optical trap of cesium for laser cooling and optical transport with static magnetic fields

Neutral-atom platforms increasingly require cooling and trapping techniques compatible with static magnetic fields, a challenge for alkali atoms due to the reliance of conventional sub-Doppler cooling on time-varying fields. We demonstrate a simple solution by realizing a blue-detuned, type-II magneto-optical trap (MOT) in cesium. After a standard red-detuned MOT, cooling on the closed F=3→F'=2 transition at 852 nm provides a second stage of laser cooling to temperatures near 20 μK and enables direct loading into a one-dimensional optical lattice. We further demonstrate optical transport of the trapped atomic ensemble without changing the magnetic field configuration. This approach offers a robust and easily implemented cooling technique for cesium that is compatible with static-field environments and provides access to performance typically associated with narrow-line cooling.