Statistical mechanics of strings with Y-junctions
arXiv:0803.3968 · doi:10.1103/PhysRevD.78.023521
Abstract
We investigate the Hagedorn transitions of string networks with Y-junctions as may occur, for example, with (p,q) cosmic superstrings. In a simplified model with three different types of string, the partition function reduces to three generalised coupled XY models. We calculate the phase diagram and show that, as the system is heated, the lightest strings first undergo the Hagedorn transition despite the junctions. There is then a second, higher, critical temperature above which infinite strings of all tensions, and junctions, exist. Conversely, on cooling to low temperatures, only the lightest strings remain, but they collapse into small loops.
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Cited by in corpus (8)
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- Cosmic strings and their induced non-Gaussianities in the cosmic microwave background
- Gravitating (field theoretical) cosmic (p,q)-superstrings
- Detection of cosmic superstrings by geodesic test particle motion
- Stability of superconducting strings coupled to cosmic strings
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