New paper out!

Our new paper Using dynamical decoupling to investigate magnetism of large-spin atoms from the chromium BEC lab is out. You can find it on the website Phys. Rev. A at this link.

We present a detailed investigation of itinerant magnetism in a dipolar Bose gas of chromium atoms confined in a three-dimensional optical lattice, expanding on results recently reported in [Phys. Rev. Lett. 136, 103401 (2026)]. In the low-entropy, near-unit filling regime, we employ advanced dynamical decoupling techniques to suppress magnetic-field noise and probe spin coherence across the superfluid–Mott insulator transition.

Top: dynamical decoupling (DD) sequences that we have studied. The Ramsey sequence is complemented by a series of π pulses separated by a duration T . πx,y represent rotations of an angle ≈π around the X or Y axis. Bottom: DD outcomes. Open red symbols are obtained without DD. “X” sequence (where πx pulses are repeatedly applied) does not preserve coherence long enough (open orange symbols), unlike “Y” sequence (repeated πy pulses, solid green symbols).