The Creation and Propagation of Radiation: Fields Inside and Outside of Sources

Posted by klaurent MIT

Kavli Affiliate: John W. Belcher | First 5 Authors: Stanislaw Olbert, John W. Belcher, Richard H. Price, , | Summary: We present a new algorithm for computing the electromagnetic fields of currents inside and outside of finite current sources, for arbitrary time variations in the currents. Unexpectedly, we find that our solutions for these fields […]


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Strong Coupling Problem with Time-Varying Sound Speed

Posted by Chicago

Kavli Affiliate: Austin Joyce | First 5 Authors: Austin Joyce, Justin Khoury, , , | Summary: For a single scalar field with unit sound speed minimally coupled to Einstein gravity, there are exactly three distinct cosmological solutions which produce a scale invariant spectrum of curvature perturbations in a dynamical attractor background, assuming vacuum initial conditions: […]


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