First demonstration of 6 dB quantum noise reduction in a kilometer scale gravitational wave observatory

Abstract

Photon shot noise, arising from the quantum-mechanical nature of the light, currently limits the sensitivity of all the gravitational wave observatories at frequencies above one kilohertz. We report a successful application of squeezed vacuum states of light at the GEO\,600 observatory and demonstrate for the first time a reduction of quantum noise up to $6.03\pm 0.02$ dB in a kilometer-scale interferometer. This is equivalent at high frequencies to increasing the laser power circulating in the interferometer by a factor of four. Achieving this milestone, a key goal for the upgrades of the advanced detectors, required a better understanding of the noise sources and losses, and implementation of robust control schemes to mitigate their contributions. In particular, we address the optical losses from beam propagation, phase noise from the squeezing ellipse, and backscattered light from the squeezed light source. The expertise gained from this work carried out at GEO 600 provides insight towards the implementation of 10 dB of squeezing envisioned for third-generation gravitational wave detectors.

References in corpus (23)

• Observation of Gravitational Waves from a Binary Black Hole Merger
• Properties of the binary neutron star merger GW170817
• Enhancing the sensitivity of the LIGO gravitational wave detector by using squeezed states of light
• A gravitational wave observatory operating beyond the quantum shot-noise limit: Squeezed light in application
• First Long-Term Application of Squeezed States of Light in a Gravitational-Wave Observatory
• Measuring the neutron star equation of state with gravitational wave observations
• Searching for dark matter and variation of fundamental constants with laser and maser interferometry
• Coherent control of vacuum squeezing in the Gravitational-Wave Detection Band
• Quantum correlations between the light and kilogram-mass mirrors of LIGO
• Frequency-Dependent Squeezing for Advanced LIGO
• Observing Gravitational Waves From The Post-Merger Phase Of Binary Neutron Star Coalescence
• Measuring the neutron star tidal deformability with equation-of-state-independent relations and gravitational waves
• GEO 600 and the GEO-HF upgrade program: successes and challenges
• Novel signatures of dark matter in laser-interferometric gravitational-wave detectors
• Frequency-Dependent Squeezed Vacuum Source for Broadband Quantum Noise Reduction in Advanced Gravitational-Wave Detectors
• DC-readout of a signal-recycled gravitational wave detector
• The GEO600 squeezed light source
• Quantum Noise Locking
• Demonstration of interferometer enhancement through EPR entanglement
• Phase Control of Squeezed Vacuum States of Light in Gravitational Wave Detectors
• Alignment sensing and control for squeezed vacuum states of light
• Optimal Alignment Sensing of a Readout Mode Cleaner Cavity
• Status of the GEO 600 squeezed-light laser

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