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Wave diffraction by a cosmic string

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arxiv 1605.03176 v2 pith:O6GK6ZUK submitted 2016-05-10 astro-ph.CO gr-qcphysics.optics

Wave diffraction by a cosmic string

classification astro-ph.CO gr-qcphysics.optics
keywords stringcosmicdiffractionwavewavescharacteristicallowsanalogous
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We show that if a cosmic string exists, it may be identified through characteristic diffraction pattern in the energy spectrum of the observed signal. In particular, if the string is on the line of sight, the wave field is shown to fit the Cornu spiral. We suggest a simple procedure, based on Keller's geometrical theory of diffraction, which allows to explain wave effects in conical spacetime of a cosmic string in terms of interference of four characteristic rays. Our results are supposed to be valid for scalar massless waves, including gravitational waves, electromagnetic waves, or even sound in case of condensed matter systems with analogous topological defects.

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Cited by 3 Pith papers

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  3. Detection of cosmic strings by gravitational wave lensing. Predictions for Einstein Telescope

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    Simulated cosmic-string lensing of binary black holes predicts Einstein Telescope would detect the events and infer Gµ ≈ 1e-10, though the source geometry is assumed ad hoc.