Taylor, Michael A; Janousek, Jiri; Knittel, Joachim; Daria, Vincent; Hage, Boris; Bachor, Hans; Bowen, Warwick
Dynamic biological measurements require low light levels to avoid damaging the specimen. With this constraint on optical power, quantum noise fundamentally limits the measurement sensitivity. This limit can only be surpassed by extracting more information per photon by using quantum correlations. Here, we experimentally demonstrate that the quantum shot noise limit can be overcome for measurements of living systems. Quantum-correlated light with amplitude noise squeezed 75% below the vacuum...[Show more]
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