Yow-Ming (Robin) Hu was a FLEET PhD student working with Centre CI Prof Elena Ostrovskaya at ANU. Robin’s project aims to characterise the topology of an exciton-polariton system and to show how to calculate and measure its quantum geometric tensor, including complex Berry curvature. This worked towards a key objective of FLEET Research theme 2: Exciton superfluids — to observe, theoretically and experimentally, topologically protected states in an exciton-polariton system.