Scientists predict that exotic quantum effects occur near a black hole’s event horizon—the boundary beyond which nothing can escape. These effects are unobservable with current astronomical detectors but can be explored using lab-based analogues of event horizons. Now Maxime Jacquet at the Kastler Brossel Laboratory in France and his colleagues have demonstrated a new analogue that uses a quantum fluid of light [1]. This platform offers a way to explore how quantum fields behave both near black holes and in arbitrary curved spacetimes.
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