Ast, M., Steinlechner, S. and Schnabel, R. (2016) Reduction of classical measurement noise via quantum-dense metrology. Physical Review Letters, 117(18), 180801. (doi: 10.1103/PhysRevLett.117.180801)
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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 propose and demonstrate a new method 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. The new method has high potential for improving the noise spectral density of gravitational-wave detectors at signal frequencies of high astrophysical relevance.
| Item Type: | Articles (Letter) |
|---|---|
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Steinlechner, Dr Sebastian |
| Authors: | Ast, M., Steinlechner, S., and Schnabel, R. |
| Subjects: | Q Science > QC Physics |
| College/School: | College of Science and Engineering > School of Physics and Astronomy |
| Journal Name: | Physical Review Letters |
| Publisher: | American Physical Society |
| ISSN: | 0031-9007 |
| ISSN (Online): | 1079-7114 |
| Copyright Holders: | Copyright © 2016 American Physical Society |
| First Published: | First published in Physical Review Letters 117(18): 180801 |
| Publisher Policy: | Reproduced in accordance with the publisher copyright policy |
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