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Title: Measurement analysis and quantum gravity

Abstract

We consider the question of whether consistency arguments based on measurement theory show that the gravitational field must be quantized. Motivated by the argument of Eppley and Hannah, we apply a DeWitt-type measurement analysis to a coupled system that consists of a gravitational wave interacting with a mass cube. We also review the arguments of Eppley and Hannah and of DeWitt, and investigate a second model in which a gravitational wave interacts with a quantized scalar field. We argue that one cannot conclude from the existing gedanken experiments that gravity has to be quantized. Despite the many physical arguments which speak in favor of a quantum theory of gravity, it appears that the justification for such a theory must be based on empirical tests and does not follow from logical arguments alone.

Authors:
; ;  [1];  [2]
  1. Institut fuer Theoretische Physik, Universitaet zu Koeln, Zuelpicher Strasse 77, 50937 Koeln (Germany)
  2. (Germany)
Publication Date:
OSTI Identifier:
21254132
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. D, Particles Fields; Journal Volume: 78; Journal Issue: 6; Other Information: DOI: 10.1103/PhysRevD.78.064051; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; GRAVITATION; GRAVITATIONAL FIELDS; GRAVITATIONAL WAVES; MASS; QUANTUM GRAVITY; SCALAR FIELDS

Citation Formats

Albers, Mark, Kiefer, Claus, Reginatto, Marcel, and Physikalisch-Technische Bundesanstalt, Bundesallee 100, 38116 Braunschweig. Measurement analysis and quantum gravity. United States: N. p., 2008. Web. doi:10.1103/PHYSREVD.78.064051.
Albers, Mark, Kiefer, Claus, Reginatto, Marcel, & Physikalisch-Technische Bundesanstalt, Bundesallee 100, 38116 Braunschweig. Measurement analysis and quantum gravity. United States. doi:10.1103/PHYSREVD.78.064051.
Albers, Mark, Kiefer, Claus, Reginatto, Marcel, and Physikalisch-Technische Bundesanstalt, Bundesallee 100, 38116 Braunschweig. Mon . "Measurement analysis and quantum gravity". United States. doi:10.1103/PHYSREVD.78.064051.
@article{osti_21254132,
title = {Measurement analysis and quantum gravity},
author = {Albers, Mark and Kiefer, Claus and Reginatto, Marcel and Physikalisch-Technische Bundesanstalt, Bundesallee 100, 38116 Braunschweig},
abstractNote = {We consider the question of whether consistency arguments based on measurement theory show that the gravitational field must be quantized. Motivated by the argument of Eppley and Hannah, we apply a DeWitt-type measurement analysis to a coupled system that consists of a gravitational wave interacting with a mass cube. We also review the arguments of Eppley and Hannah and of DeWitt, and investigate a second model in which a gravitational wave interacts with a quantized scalar field. We argue that one cannot conclude from the existing gedanken experiments that gravity has to be quantized. Despite the many physical arguments which speak in favor of a quantum theory of gravity, it appears that the justification for such a theory must be based on empirical tests and does not follow from logical arguments alone.},
doi = {10.1103/PHYSREVD.78.064051},
journal = {Physical Review. D, Particles Fields},
number = 6,
volume = 78,
place = {United States},
year = {Mon Sep 15 00:00:00 EDT 2008},
month = {Mon Sep 15 00:00:00 EDT 2008}
}