Simulation of Cosmic Strings

Cosmic String Simulations performed by the Cambridge Cosmology Group. Cosmic strings interact with each other by commuting, reconnecting, and forming loops. Cosmic strings are expected to have huge tension so as to make their motion relativistic. Vibrating string loops evaporate by emitting gravitational waves. As time elapses, long strings tend to straighten (compare long patterns in two different eras). The simulation shows that tens of long strings with cosmological length survive up to matter dominated era.

        

Figure 3. String network simulations [7]. Simulations are performed in two different eras. Left: Evolution of strings in radiation era. Right: Evolution of strings in matter dominated era. Each case the size of box is ~2ct.

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