Interferometer Response to Geontropic Fluctuations

Abstract

We model vacuum fluctuations in quantum gravity with a scalar field, characterized by a high occupation number, coupled to the metric. The occupation number of the scalar is given by a thermal density matrix, whose form is motivated by fluctuations in the vacuum energy, which have been shown to be conformal near a light-sheet horizon. For the experimental measurement of interest in an interferometer, the size of the energy fluctuations is fixed by the area of a surface bounding the volume of spacetime being interrogated by an interferometer. We compute the interferometer response to these "geontropic" scalar-metric fluctuations, and apply our results to current and future interferometer measurements, such as LIGO and the proposed GQuEST experiment.

17 pages, 6 figures

References in corpus (6)

• Towards a derivation of holographic entanglement entropy
• LIGO: The Laser Interferometer Gravitational-Wave Observatory
• Gravitational-wave sensitivity curves
• LIGOs Quantum Response to Squeezed States
• Conformal Description of Near-Horizon Vacuum States
• Modular Fluctuations from Shockwave Geometries

Cited by in corpus (18)

• Photon Counting Interferometry to Detect Geontropic Space-Time Fluctuations with GQuEST
• Probing RG flows, symmetry resolution and quench dynamics through the capacity of entanglement
• Bound on Quantum Fluctuations in Gravitational Waves from LIGO-Virgo
• Astronomical Image Blurring from Transversely Correlated Quantum Gravity Fluctuations
• Macroscopic Dark Matter Detection with Gravitational Wave Experiments
• Stochastic waveform estimation at the fundamental quantum limit
• A Maximum Force Perspective on Black Hole Thermodynamics, Quantum Pressure, and Near-Extremality
• Proper Time Observables of General Gravitational Perturbations in Laser Interferometry-based Gravitational Wave Detectors
• Quantum Area Fluctuations from Gravitational Phase Space
• Squeezed gravitons from superradiant axion fields around rotating black holes
• Modular Fluctuations in Cosmology
• Angular correlations on causally-coherent inflationary horizons
• Phenomenology of Holography via Quantum Coherence on Causal Horizons
• Response of interferometers to the vacuum of quantum gravity
• Extracting electromagnetic signatures of spacetime fluctuations
• Angular spectrum of quantum fluctuations in causal structure
• Digital Discovery of interferometric Gravitational Wave Detectors
• Signatures of Correlation of Spacetime Fluctuations in Laser Interferometers