Strongly Dipolar Two-Dimensional Quantum Gases: from Superfluid to Supesolid

In two dimensions (2D), dipolar quantum gases provide a platform for studying complex ordered phases, from superfluids to supersolids. Strong dipolar interactions enrich this picture by revealing density modulation in both superfluids and supersolids. In this poster, we discuss our experimental investigation of strongly dipolar 2D systems with tilted dipolar angle, showing unusual collective mode and stripe pattern when dipolar interactions become dominant. First, we use breathing-mode dynamics to reveal scale-invariance breaking as dipoles tilt in-plane, where ω_B/ω_t deviates from ≃ 2 and stripe modulations emerging. Second, we directly image a robust stripe lattice and establish its supersolid character by demonstrating (i) stable periodic density modulation, (ii) global phase coherence across stripes via matter-wave interference, and (iii) a coherent low-energy response consistent with phase rigidity. Finally, we discuss our efforts to upgrade our apparatus, in which supersolid samples will be studied in a tunable box trap with an improved imaging system.