TY - JOUR

T1 - String-inspired infinite-derivative theories of gravity

T2 - a brief overview

AU - Biswas, Tirthabir

AU - Talaganis, Spyridon

PY - 2015/1/23

Y1 - 2015/1/23

N2 - In String Theory, there often appears a rather interesting class of higher derivative theories containing an infinite set of derivatives in the form of an exponential. These theories may provide a way to tame ultraviolet (UV) divergences without introducing ghost-like states. Here we provide a brief overview on the progress that has been made over the last decade to construct such infinite-derivative theories of gravity (IDG) which may be able to address the singularity problems in gravity. In the process, we will present some general results that applies to covariant torsion-free metric theories of gravity.

AB - In String Theory, there often appears a rather interesting class of higher derivative theories containing an infinite set of derivatives in the form of an exponential. These theories may provide a way to tame ultraviolet (UV) divergences without introducing ghost-like states. Here we provide a brief overview on the progress that has been made over the last decade to construct such infinite-derivative theories of gravity (IDG) which may be able to address the singularity problems in gravity. In the process, we will present some general results that applies to covariant torsion-free metric theories of gravity.

KW - Spacetime singularities

KW - modifications of general relativity

KW - metric perturbations

U2 - 10.1142/S021773231540009X

DO - 10.1142/S021773231540009X

M3 - Journal article

VL - 30

JO - Modern Physics Letters A

JF - Modern Physics Letters A

SN - 0217-7323

IS - 03n04

M1 - 1540009

ER -