Covariant vertex operators for cosmic strings

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• Dimitri Skliros, University of Sussex
• Friday 12 March 2010, 13:00-14:00
• Pavilion B Potter Room (B1.19).

If you have a question about this talk, please contact David Kubiznak.

I will discuss the first construction of coherent states (and other massive states with arbitrarily excited harmonics) in the covariant formalism for both open and closed strings with applications to cosmic strings in mind. Furthermore, I provide an explicit map that relates three different descriptions of cosmic strings: classical strings, lightcone gauge quantum states and covariant vertex operators, highlighting the virtues and shortcomings of each. I will then go on to discuss applications and future directions: string amplitude computations with such vertices and in particular decays of (the phenomenologically promising) cosmic strings with non-degenerate cusps in a framework that naturally incorporates the effects of gravitational backreaction. The talk is partly based on arXiv:0911.5354.

This talk is part of the DAMTP Friday GR Seminar series.

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