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- W1575812795 abstract "Summary form only given. The present techniques allow one to perform or measurements at or even beyond the standard quantum noise level, even on single objects. In this context, Kip Thorne and Vladimir Braginsky introduced in the seventies the concept of Quantum Non Demolition (QND) measurement, which was initially meant to be applied to mechanical harmonic oscillators designed for detecting gravitational waves, the so-called Weber's bars. But the QND ideas encountered a real success in optics, where fluctuations are readily accessible, and can also be circumvented. We review the state of the art of QND measurements, in this broad sense of sub-shot-noise optical information processing. Most of the initial objectives of QND measurements have now been successfully reached through proof-of-principle experiments. The domain is now opening on future perspectives related to information processing (e.g. cryptography), either with discrete or continuous variables. In this context the close relationship between QND measurements and controlled-NOT (CNOT) gates are discussed and illustrated." @default.
- W1575812795 created "2016-06-24" @default.
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- W1575812795 date "2002-11-11" @default.
- W1575812795 modified "2023-09-25" @default.
- W1575812795 title "Quantum nondemolition measurements" @default.
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- W1575812795 doi "https://doi.org/10.1109/cleoe.2000.909818" @default.
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