Quantum Enhancement of the Zero-Area Sagnac Interferometer Topology for Gravitational Wave Detection
| Autor: | Roman Schnabel, Moritz Mehmet, Jöran Bauchrowitz, H. Vahlbruch, Tobias Eberle, Vitus Händchen, Sebastian Steinlechner, Helge Müller-Ebhardt |
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| Rok vydání: | 2010 |
| Předmět: |
Condensed Matter::Quantum Gases
Physics Quantum Physics Interferometric visibility business.industry Quantum limit Intensity interferometer FOS: Physical sciences General Physics and Astronomy Topology (electrical circuits) Degree of coherence Topology 01 natural sciences 010309 optics Interferometry Optics 0103 physical sciences Astronomical interferometer LASER Quantum Physics (quant-ph) 010306 general physics business Squeezed coherent state |
| Zdroj: | Physical Review Letters, 104(25):251102. American Physical Society Pysical Review Letters |
| ISSN: | 1079-7114 0031-9007 |
| Popis: | Only a few years ago, it was realized that the zero-area Sagnac interferometer topology is able to perform quantum nondemolition measurements of position changes of a mechanical oscillator. Here, we experimentally show that such an interferometer can also be efficiently enhanced by squeezed light. We achieved a nonclassical sensitivity improvement of up to 8.2 dB, limited by optical loss inside our interferometer. Measurements performed directly on our squeezed-light laser output revealed squeezing of 12.7 dB. We show that the sensitivity of a squeezed-light enhanced Sagnac interferometer can surpass the standard quantum limit for a broad spectrum of signal frequencies without the need for filter cavities as required for Michelson interferometers. The Sagnac topology is therefore a powerful option for future gravitational-wave detectors, such as the Einstein Telescope, whose design is currently being studied. Comment: 4 pages, 4 figures |
| Databáze: | OpenAIRE |
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