How to simulate global cosmic strings with large string tension
  Global string networks may be relevant in axion production in the early
Universe, as well as other cosmological scenarios. Such networks contain a
large hierarchy of scales between the string core scale and the Hubble scale,
log(f/H) around 70, which influences the network dynamics by giving the strings
large tensions T = pi f^2 log(f/H). We present a new numerical approach to
simulate such global string networks, capturing the tension without an
exponentially large lattice.
