2025/07/21 by Sara Conti, Conti, Sara, Andrey Chaves +10 · 1 voice
Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #FOS: Physical sciences #Other Condensed Matter (cond-mat.other) #Physics of Superconductivity and Magnetism #Quantum Gases (cond-mat.quant-gas) #Strong Light-Matter Interactions #cond-mat.other #cond-mat.quant-gas
paper · pdf · doi:10.48550/arxiv.2507.15561
openalex publication_date 2025/07/21 · arxiv published 2025/07/21 · arxiv updated 2025/07/21 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Recently observed signatures of Bose-Einstein condensation and superfluidity of dipolar excitons have drawn enormous attention to excitonic semiconductor bilayers. In superfluids, stabilization and observation of vortex matter is usually a decisive proof of coherent condensation order. However to date, the vortex behavior in a 2D excitonic system with aligned dipole-like interactions that are long-range and everywhere repulsive has not been addressed. We here provide a theoretical description of the vortex characteristics, interaction, and lattices in a dipolar exciton superfluid, solving the corresponding Gross-Pitaevskii equation, while varying the exciton dipole moments and the exciton density - both tunable in the experiment, by interlayer separation and gating, respectively. We draw particular attention to the appearance of a maximum in the density redistribution around the edge of each vortex, in the phase-space region where the dipole interactions are particularly strong, and where a transition to an incompressible exciton supersolid is expected.