A Caltech Library Service

Interferometer response to geontropic fluctuations

Li, Dongjun and Lee, Vincent S. H. and Chen, Yanbei and Zurek, Kathryn M. (2023) Interferometer response to geontropic fluctuations. Physical Review D, 107 (2). Art. No. 024002. ISSN 2470-0010. doi:10.1103/physrevd.107.024002.

[img] PDF - Published Version
See Usage Policy.


Use this Persistent URL to link to this item:


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:Article
Related URLs:
URLURL TypeDescription ItemDiscussion Paper
Li, Dongjun0000-0002-1962-680X
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 No. 2021-2817. The work of K. Z. 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 Y. C. and D. L. is also supported by the Simons Foundation (Award No. 568762), the Brinson Foundation and the National Science Foundation (via Grants No. PHY-2011961 and No. PHY-2011968).
Group:Astronomy Department, TAPIR, Walter Burke Institute for Theoretical Physics
Funding AgencyGrant Number
Heising-Simons Foundation2021-2817
Department of Energy (DOE)DE-SC0011632
Simons Foundation568762
Brinson FoundationUNSPECIFIED
National Science FoundationPHY-2011961
National Science FoundationPHY-2011968
Issue or Number:2
Record Number:CaltechAUTHORS:20230207-728273600.2
Persistent URL:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:119082
Deposited By: Research Services Depository
Deposited On:09 Mar 2023 21:29
Last Modified:09 Mar 2023 21:29

Repository Staff Only: item control page