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String-inspired infinite-derivative theories of gravity: a brief overview

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Article number1540009
<mark>Journal publication date</mark>23/01/2015
<mark>Journal</mark>Modern Physics Letters A
Issue number03n04
Publication StatusPublished
<mark>Original language</mark>English


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.