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Attend a 57-minute seminar exploring the theoretical foundations and recent experimental breakthroughs in supersolidity research. Learn about the historical development of supersolidity theory from its 1970s origins as Bose-Einstein condensation of vacancies in crystals through the inconclusive attempts to observe it in solid Helium-4. Discover how 21st-century understanding revealed that periodically arranged superfluids possess all characteristic features of supersolids, making observation possible in cold atom and exciton-polariton systems. Examine the three key conditions that enable supersolidity observation: roton instability, attractive interaction of bosons, and negative effective mass. Gain insights into the latest progress in this cutting-edge research area from Prof. Alexey Kavokin of the Abrikosov Center for Theoretical Physics.
