# The noise of gravitons

@article{Parikh2020TheNO, title={The noise of gravitons}, author={Maulik Parikh and Frank Wilczek and George Zahariade}, journal={arXiv: High Energy Physics - Theory}, year={2020} }

We show that when the gravitational field is treated quantum-mechanically, it induces fluctuations -- noise -- in the lengths of the arms of gravitational wave detectors. The characteristics of the noise depend on the quantum state of the gravitational field, and can be calculated exactly in several interesting cases. For coherent states the noise is very small, but it can be greatly enhanced in thermal and (especially) squeezed states. Detection of this fundamental noise would constitute…

## 27 Citations

Signatures of the quantization of gravity at gravitational wave detectors

- Physics, GeologyPhysical Review D
- 2021

We develop a formalism to calculate the response of a model gravitational wave detector to a quantized gravitational field. Coupling a detector to a quantum field induces stochastic fluctuations…

Quantum Mechanics of Gravitational Waves.

- PhysicsPhysical review letters
- 2021

The gravitational field is treated as a quantum field and it is found that falling bodies in gravity are subject to random fluctuations ("noise") whose characteristics depend on the quantum state of the gravitational field.

Noise and decoherence induced by gravitons

- Physics, Geology
- 2020

We study quantum noise and decoherence induced by gravitons. We derive a Langevin equation of geodesic deviation in the presence of gravitons. The amplitude of noise correlations tells us that large…

Quantum State Evolution in an Environment of Cosmological Perturbations

- Physics
- 2021

We study the pure and thermal states of quantized scalar and tensor perturbations in various epochs of Universe evolution. We calculate the density matrix of non-relativistic particles in an…

Gravitational decoherence of photons

- PhysicsClassical and Quantum Gravity
- 2021

Models of gravitational decoherence are not commonly applied to ultra-relativistic systems, including photons. As a result, few quantum optical tests of gravitational decoherence have been developed.…

Gravitational effects in macroscopic quantum systems: a first-principles analysis

- PhysicsClassical and Quantum Gravity
- 2021

We analyze the weak-field limit of general relativity with matter and its possible quantisations. This analysis aims toward a predictive quantum theory to provide a first-principles description of…

Light-ray operators, detectors and gravitational event shapes

- PhysicsJournal of High Energy Physics
- 2021

Abstract
Light-ray operators naturally arise from integrating Einstein equations at null infinity along the light-cone time. We associate light-ray operators to physical detectors on the celestial…

A manifestly covariant theory of multifield stochastic inflation in phase space: solving the discretisation ambiguity in stochastic inflation

- Computer ScienceJournal of Cosmology and Astroparticle Physics
- 2020

A path-integral derivation of Langevin equations is developed, which solves conceptual issues of the heuristic approach made at the level of the classical equations of motion, and allows in principle to compute corrections to the stochastic formalism.

Quantum black hole spectroscopy: probing the quantum nature of the black hole area using LIGO–Virgo ringdown detections

- PhysicsClassical and Quantum Gravity
- 2021

We present a thorough observational investigation of the heuristic quantised ringdown model presented by Foit and Kleban (2019 Class. Quantum Grav. 36 035006). This model is based on the…

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