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Journal Article

Reduction of Classical Measurement Noise via Quantum-Dense Metrology

MPS-Authors
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Ast,  Melanie
Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

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Steinlechner,  Sebastian
Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

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Schnabel,  Roman
Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

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Fulltext (public)

1607.00130.pdf
(Preprint), 836KB

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Citation

Ast, M., Steinlechner, S., & Schnabel, R. (2016). Reduction of Classical Measurement Noise via Quantum-Dense Metrology. Physical Review Letters, 117: 180801. doi:10.1103/PhysRevLett.117.180801.


Cite as: http://hdl.handle.net/11858/00-001M-0000-002C-3E4E-7
Abstract
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.