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- W2795582942 abstract "When a positively charged impurity is placed inside a cold metal, the resulting charge density around that object exhibits characteristic ripples to negative values, known as Friedel oscillations. In this essay, we describe a somewhat analogous effect in (i) linearized higher-derivative gravity and (ii) linearized infinite-derivative ghost-free gravity: when a gravitational impurity (point particle) is placed in Minkowski vacuum, the local energy density $rho equiv G{}_{munu}xi{}^mu xi{}^nu$ (with $xi=partial_t$) exhibits oscillations to negative values. The wavelength of these oscillations is roughly given by (i) the Pauli--Villars regularization scale and (ii) the scale of non-locality. We hence dub this phenomenon gravitational Friedel oscillations." @default.
- W2795582942 created "2018-04-13" @default.
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- W2795582942 date "2018-10-01" @default.
- W2795582942 modified "2023-09-23" @default.
- W2795582942 title "Gravitational Friedel oscillations in higher-derivative and infinite-derivative gravity?" @default.
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- W2795582942 doi "https://doi.org/10.1142/s0218271818470223" @default.
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