English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Only a few years ago, it was realized that the zero-area Sagnacinterferometer topology is able to perform quantum nondemolition measurementsof position changes of a mechanical oscillator. Here, we experimentally showthat such an interferometer can also be efficiently enhanced by squeezed light.We achieved a nonclassical sensitivity improvement of up to 8.2 dB, limited byoptical loss inside our interferometer. Measurements performed directly on oursqueezed-light laser output revealed squeezing of 12.7 dB. We show that thesensitivity of a squeezed-light enhanced Sagnac interferometer can surpass thestandard quantum limit for a broad spectrum of signal frequencies without theneed for filter cavities as required for Michelson interferometers. The Sagnactopology is therefore a powerful option for future gravitational-wavedetectors, such as the Einstein Telescope, whose design is currently beingstudied.

Quantum Enhancement of the Zero-Area Sagnac Interferometer Topology for Gravitational Wave Detection