| Issue |
Europhys. Lett.
Volume 63, Number 2, July 2003
|
|
|---|---|---|
| Page(s) | 226 - 232 | |
| Section | Electromagnetism, optics, acoustics, heat transfer, classical mechanics, and fluid dynamics | |
| DOI | https://doi.org/10.1209/epl/i2003-00527-x | |
| Published online | 01 November 2003 | |
Back-action cancellation in interferometers by quantum locking
Laboratoire Kastler Brossel, Case 74 - 4 place Jussieu
F-75252 Paris Cedex 05, France
Received:
21
January
2003
Accepted:
22
May
2003
We show that back-action noise in interferometric measurements such as gravitational-waves detectors can be completely suppressed by a local control of mirrors motion. An optomechanical sensor with an optimized measurement strategy is used to monitor mirror displacements. A feedback loop then eliminates radiation-pressure effects without adding noise. This very efficient technique leads to an increased sensitivity for the interferometric measurement, which becomes only limited by phase noise. Back-action cancellation is furthermore insensitive to losses in the interferometer.
PACS: 42.50.Lc – Quantum fluctuations, quantum noise, and quantum jumps / 04.80.Nn – Gravitational wave detectors and experiments / 03.65.Ta – Foundations of quantum mechanics; measurement theory
© EDP Sciences, 2003
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