Scientists have experimentally observed the coexistence and competition between triangular and stripe spatial orders in a dipolar quantum gas. This advance is significant because supersolids are exotic quantum states where long-range phase coherence coexists with emergent spatial orders, and the structural variety predicted for two-dimensional dipolar supersolids has been challenging to observe. The study, published on arXiv, demonstrates the formation of these density-modulated phases in a gas of highly magnetic atoms, opening new avenues for exploring complex quantum phenomena.

To achieve this, the team confined magnetic atoms in a surfboard-shaped trap and tuned the contact interaction strength and dipole orientation. They defined a structural order parameter to study the statistical behavior of the system, which allowed them to identify both the triangular and stripe phases, as well as the transition between them. The critical behavior associated with this transition was marked by enhanced non-Gaussian fluctuations, a key indicator of the system's complexity.

A crucial finding was the observation of each spatial structure in both the phase-coherent supersolid regime and the phase-incoherent insulating one. This was achieved near and far from the unmodulated-to-modulated transition, respectively. These results establish a versatile platform for investigating multiple phases of the two-dimensional supersolid phase diagram and, more generally, intertwined symmetry-breaking phenomena. The ability to control and observe these complex phases is an important step towards understanding exotic quantum matter.