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Title: A nonlocal approach to the cosmological constant problem

Abstract

We construct a model in which the cosmological constant is canceled from the gravitational equations of motion. Our model relies on two key ingredients: a nonlocal constraint on the action, which forces the spacetime average of the Lagrangian density to vanish, and a dynamical way for this condition to be satisfied classically with arbitrary matter content. We implement the former condition with a spatially constant Lagrange multiplier associated with the volume form and the latter by including a free four-form gauge field strength in the action. These two features are enough to remove the cosmological constant from the Einstein equation. The model is consistent with all cosmological and experimental bounds on modification of gravity and allows for both cosmic inflation and the present epoch of acceleration.

Authors:
 [1];  [1]
  1. California Institute of Technology (CalTech), Pasadena, CA (United States). Walter Burke Institute for Theoretical Physics
Publication Date:
Research Org.:
California Institute of Technology (CalTech), Pasadena, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25); Foundational Questions Institute; National Science Foundation (NSF)
OSTI Identifier:
1599605
Alternate Identifier(s):
OSTI ID: 1361933
Report Number(s):
CALT-TH-2017-016
Journal ID: ISSN 2470-0010; PRVDAQ
Grant/Contract Number:  
SC0011632; DGE-1144469
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review D
Additional Journal Information:
Journal Volume: 95; Journal Issue: 12; Journal ID: ISSN 2470-0010
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS

Citation Formats

Carroll, Sean M., and Remmen, Grant N. A nonlocal approach to the cosmological constant problem. United States: N. p., 2017. Web. doi:10.1103/PhysRevD.95.123504.
Carroll, Sean M., & Remmen, Grant N. A nonlocal approach to the cosmological constant problem. United States. doi:10.1103/PhysRevD.95.123504.
Carroll, Sean M., and Remmen, Grant N. Wed . "A nonlocal approach to the cosmological constant problem". United States. doi:10.1103/PhysRevD.95.123504. https://www.osti.gov/servlets/purl/1599605.
@article{osti_1599605,
title = {A nonlocal approach to the cosmological constant problem},
author = {Carroll, Sean M. and Remmen, Grant N.},
abstractNote = {We construct a model in which the cosmological constant is canceled from the gravitational equations of motion. Our model relies on two key ingredients: a nonlocal constraint on the action, which forces the spacetime average of the Lagrangian density to vanish, and a dynamical way for this condition to be satisfied classically with arbitrary matter content. We implement the former condition with a spatially constant Lagrange multiplier associated with the volume form and the latter by including a free four-form gauge field strength in the action. These two features are enough to remove the cosmological constant from the Einstein equation. The model is consistent with all cosmological and experimental bounds on modification of gravity and allows for both cosmic inflation and the present epoch of acceleration.},
doi = {10.1103/PhysRevD.95.123504},
journal = {Physical Review D},
number = 12,
volume = 95,
place = {United States},
year = {2017},
month = {6}
}

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Cited by: 5 works
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