Covariant Vertex Operators for Cosmic Strings

Abstract

We construct complete sets of (open and closed string) covariant coherent state and mass eigenstate vertex operators in bosonic string theory. By minimally extending the standard definition of coherent states so as to include the string theory requirements, we show that the naive construction of the the closed string coherent states requires the existence of a lightlike compactification of spacetime. When the null winding states in the underlying Hilbert space are projected out the resulting vertex operators satisfy the definition of a coherent state and have a classical interpretation. We present explicitly both the covariant and lightcone gauge realization of the resulting states using the DDF map that relates the two. We also identify the corresponding general lightcone gauge classical solutions around which the quantum states are fluctuating. We go on to show that both the covariant gauge coherent vertex operators, the corresponding lightcone gauge coherent states and the classical solutions all share the same mass and angular momenta and conjecture that the covariant and lightcone gauge states are different manifestations of the same state and share identical interactions. This construction can be used to study the evolution of fundamental cosmic strings as predicted by string theory and may also be useful for other applications where massive string vertex operators are of interest.

This paper has been withdrawn by the authors. The content of this paper has evolved significantly since the appearance of this preprint. A large chunk of the revised content will be found in the article entitled `String Vertex Operators and Cosmic Strings', and the comments on Weinberg's construction will be subsequently submitted as a brief report

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Cited by in corpus (5)

• Chaotic scattering of highly excited strings
• On the soft limit of closed string amplitudes with massive states
• On the soft limit of open string disk amplitudes with massive states
• DDF operators, open string coherent states and their scattering amplitudes
• String coherent vertex operators of Neveu-Schwarz and Ramond states