Aharonov-Bohm Radiation
  A solenoid oscillating in vacuum will pair produce charged particles due to
the Aharonov-Bohm (AB) interaction. We calculate the radiation pattern and
power emitted for charged scalar particles. We extend the solenoid analysis to
cosmic strings, and find enhanced radiation from cusps and kinks on loops. We
argue by analogy with the electromagnetic AB interaction that cosmic strings
should emit photons due to the gravitational AB interaction of fields in the
conical spacetime of a cosmic string. We calculate the emission from a kink and
find that it is of similar order as emission from a cusp, but kinks are vastly
more numerous than cusps and may provide a more interesting observational
signature.
