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Interferometer Response to Geontropic Fluctuations

Li, Dongjun and Lee, Vincent S. H. and Chen, Yanbei and Zurek, Kathryn M. (2022) Interferometer Response to Geontropic Fluctuations. . (Unpublished)

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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.

Item Type:Report or Paper (Discussion Paper)
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URLURL TypeDescription Paper ItemJournal Article
Chen, Yanbei0000-0002-9730-9463
Zurek, Kathryn M.0000-0002-2629-337X
Additional Information:We thank Temple He, Allic Sivaramakrishnan, and Jordan Wilson-Gerow for discussions and comments on the draft, and Lee McCuller for comments and help with recasting the Holometer bounds. We are supported by the Heising-Simons Foundation “Observational Signatures of Quantum Gravity” collaboration grant 2021- 2817. The work of KZ is also supported by a Simons Investigator award and the U.S. Department of Energy, Office of Science, Office of High Energy Physics, under Award No. DE-SC0011632. The work of YC and DL is also supported by the Simons Foundation (Award Number 568762), the Brinson Foundation and the National Science Foundation (via grants PHY-2011961 and PHY2011968)
Group:Astronomy Department, Walter Burke Institute for Theoretical Physics
Funding AgencyGrant Number
Heising-Simons Foundation2021-2817
Department of Energy (DOE)DE-SC0011632
Simons Foundation568762
Brinson FoundationUNSPECIFIED
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Record Number:CaltechAUTHORS:20220922-220443602
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:117117
Deposited By: Joy Painter
Deposited On:23 Sep 2022 15:59
Last Modified:09 Mar 2023 20:57

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