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. https://resolver.caltech.edu/CaltechAUTHORS:20230207-728273600.2
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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.
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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 | ||||||||||||||
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Issue or Number: | 2 | ||||||||||||||
DOI: | 10.1103/physrevd.107.024002 | ||||||||||||||
Record Number: | CaltechAUTHORS:20230207-728273600.2 | ||||||||||||||
Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20230207-728273600.2 | ||||||||||||||
Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | ||||||||||||||
ID Code: | 119082 | ||||||||||||||
Collection: | CaltechAUTHORS | ||||||||||||||
Deposited By: | Research Services Depository | ||||||||||||||
Deposited On: | 09 Mar 2023 21:29 | ||||||||||||||
Last Modified: | 09 Mar 2023 21:29 |
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