Rights statement: © 2015 American Physical Society
Accepted author manuscript, 194 KB, PDF document
Available under license: CC BY: Creative Commons Attribution 4.0 International License
Rights statement: © 2015 American Physical Society
Final published version, 156 KB, PDF document
Available under license: CC BY: Creative Commons Attribution 4.0 International License
Final published version
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Nonlocal gravity in D-dimensions
T2 - propagators, entropy, and bouncing cosmology
AU - Conroy, Aindriu
AU - Mazumdar, Anupam
AU - Talaganis, Spyridon
AU - Teimouri, Ilia
N1 - © 2015 American Physical Society
PY - 2015/12/22
Y1 - 2015/12/22
N2 - We present the graviton propagator for an infinite derivative, D-dimensional, nonlocal action, up to quadratic order in curvature around a Minkowski background, and discuss the conditions required for this class of gravity theory to be ghost-free. We then study the gravitational entropy for de-Sitter and anti-de Sitter backgrounds, before comparing with a recently derived result for a Schwarzschild black hole, generalized to arbitrary D dimensions, whereby the entropy is given simply by the area law. A novel approach of decomposing the entropy into its (r,t) and spherical components is adopted in order to illustrate the differences more clearly. We conclude with a discussion of de-Sitter entropy in the framework of a nonsingular bouncing cosmology.
AB - We present the graviton propagator for an infinite derivative, D-dimensional, nonlocal action, up to quadratic order in curvature around a Minkowski background, and discuss the conditions required for this class of gravity theory to be ghost-free. We then study the gravitational entropy for de-Sitter and anti-de Sitter backgrounds, before comparing with a recently derived result for a Schwarzschild black hole, generalized to arbitrary D dimensions, whereby the entropy is given simply by the area law. A novel approach of decomposing the entropy into its (r,t) and spherical components is adopted in order to illustrate the differences more clearly. We conclude with a discussion of de-Sitter entropy in the framework of a nonsingular bouncing cosmology.
KW - hep-th
KW - astro-ph.CO
KW - gr-qc
KW - hep-ph
U2 - 10.1103/PhysRevD.92.124051
DO - 10.1103/PhysRevD.92.124051
M3 - Journal article
VL - 92
JO - Physical Review D
JF - Physical Review D
SN - 1550-7998
IS - 12
M1 - 124501
ER -