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06 October 2022
 
  » arxiv » 1706.3305

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Intrinsic non-commutativity of closed string theory
Laurent Freidel ; Robert G. Leigh ; Djordje Minic ;
Date 11 Jun 2017
AbstractWe show that the proper interpretation of the cocycle operators appearing in the physical vertex operators of compactified strings is that the closed string target is non-commutative. We track down the appearance of this non-commutativity to the Polyakov action of the flat closed string in the presence of translational monodromies (i.e., windings). In view of the unexpected nature of this result, we present detailed calculations from a variety of points of view, including a careful understanding of the consequences of mutual locality in the vertex operator algebra, as well as a detailed analysis of the symplectic structure of the Polyakov string. We also underscore why this non-commutativity was not emphasized previously in the existing literature. This non-commutativity can be thought of as a central extension of the zero-mode operator algebra, an effect set by the string length scale -- it is present even in trivial backgrounds. Clearly, this result indicates that the $alpha’ o 0$ limit is more subtle than usually assumed.
Source arXiv, 1706.3305
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