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キーワード:
Quantum Physics, quant-ph
要旨:
Quantum-dense metrology (QDM) constitutes a special case of quantum metrology
in which two orthogonal phase space projections of a signal are simultaneously
sensed beyond the shot noise limit. Previously it was shown that the additional
sensing channel that is provided by QDM contains information that can be used
to identify and to discard corrupted segments from the measurement data. Here,
we demonstrate a proof-of-principle experiment in which this information is
used for improving the sensitivity without discarding any measurement segments.
Our measurement reached sub-shot-noise performance although initially strong
classical noise polluted the data.
