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Join a 57-minute seminar where Professor Alexey Kavokin from the Abrikosov Center for Theoretical Physics (ACTP) explores "The Discovery of Supersolidity." Delve into the fascinating history of supersolidity, which was first introduced in the 1970s as an effect originating from the Bose-Einstein condensation of vacancies in crystals. Learn why early attempts to observe this phenomenon in solid Helium-4 yielded inconclusive results, and discover the breakthrough understanding developed in the 21st century that a periodically arranged superfluid possesses all characteristic features of a supersolid. Examine the three key conditions that make observation of supersolidity possible in cold atom and exciton-polariton systems: the roton instability, the attractive interaction of bosons, and the negative effective mass. Gain insights into recent progress in this cutting-edge research area through this comprehensive theoretical physics presentation.
