Asymptotic symmetries and electromagnetic memory
By Sabrina Pasterski. 2015
140 citations recorded by the source corpus.
A bstractRecent investigations into asymptotic symmetries of gauge theory and gravity have illuminated connections between gauge field zero-mode sectors, the corresponding soft factors, and their classically observable counterparts — so called “memories”. Namely, low frequency emissions in momentum space correspond to long time integrations of the corre-sponding radiation in position space. Memory effect observables constructed in this manner are non-vanishing in typical scattering processes, which has implications for the asymptotic symmetry group. Here we complete this triad for the case of large U(1) gauge symmetries at null infinity. In particular, we show that the previously studied electromagnetic memory effect, whereby the passage of electromagnetic radiation produces a net velocity kick for test charges in a distant detector, is the position space observable corresponding to th Weinberg soft photon pole in momentum space scattering amplitudes.
Subfields: Atomic and Molecular Physics, and Optics, Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/1ece28323b63f04edbb2b75dd49c05b8c9b29427
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In Atomic and Molecular Physics, and Optics
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Citations in the corpus
- Celestial Holography (2021, background): “It is tantalizing to ask: Can spin memory be measured by LISA? Will color memory be observed at the EIC? At the moment there are various proof-of-concept measurement proposals [33,34,39,41] and experimental feasibility studies [40] for these lesser known memories, but we expect there is much more to”
- Lectures on the Infrared Structure of Gravity and Gauge Theory (2017, background): “Details of how this “electromagnetic memory effect” can be observed are discussed in the literature [38,39,201].”
- Lectures on celestial amplitudes (2021, background): “Memory effects [74–77] were the position space incarnation of the soft operators that generated asymptotic symmetry transformations and could serve as experimental probes of the assumptions built into our asymptotic analyses [39, 40, 78].”
- Soft Hair on Black Holes. (2016, methodology): “Soft photons exiting at I+ can be measured using the electromagnetic memory effect [51, 52, 53].”