Probing Coherences and Itinerant Magnetism in a Dipolar Lattice Gas
Abstract
We report on the study of itinerant magnetism of lattice-trapped magnetic atoms, driven by magnetic dipole-dipole interactions, in the low-entropy and close-to-unit filling regime. We have used advanced dynamical decoupling techniques to efficiently suppress the sensitivity to magnetic field fluctuations. We have thus measured the spin coherence of an itinerant spin 3 Bose dipolar gas throughout a quantum phase transition from a superfluid phase to a Mott insulating phase. In the superfluid phase, a metastable ferromagnetic behavior is observed below a dynamical instability that occurs at lattice depths below the phase transition. In the insulating phase, the thermalization toward a paramagnetic state is driven by an interplay between intersite and superexchange interactions.
Fields of Study & Subjects
Cold Atom Physics and Bose-Einstein Condensates
Physics of Superconductivity and Magnetism
Quantum and electron transport phenomena
Publication details
- Journal / source
- Physical Review Letters
- Publisher
- American Physical Society (APS)
- Volume
- 136
- Issue
- 10
- Pages
- 103401–103401
- Publication date
- 2 February 2026
- Language
- EN