Quantum Cryptography

Our observations at the GW observatory LIGO show that the quantum uncertainty of intense laser light affects the quantum uncertainty of 40 kg mirrors, resulting in correlated quantum uncertainties.

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Quantum noise is a limiting issue in high-precision measurements of gravitational waves. Recently, we performed a proof-of-principle experiment about the sensitivity enhancement of gravitational-wave observatories via quantum entanglement of laser light. Our results were published in Nature...