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$pp$-waves as exact solutions to ghost-free infinite derivative gravity

Kilicarslan, Ercan


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    <subfield code="a">&lt;p&gt;We construct exact&amp;nbsp;pp-wave solutions of ghost-free infinite derivative gravity. These waves described in the Kerr-Schild form also solve the linearized field equations of the theory. We also find an exact gravitational shock wave with nonsingular curvature invariants and with a finite limit in the ultraviolet regime of nonlocality which is in contrast to the divergent limit in Einstein&amp;rsquo;s theory.&lt;/p&gt;</subfield>
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    <subfield code="a">$pp$-waves as exact solutions to ghost-free infinite derivative gravity</subfield>
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