BMN Operators from Wilson Loop

Details BMN Operators from Wilson Loop BMN Operators from Wilson Loop

2005-04-05

arxiv.org/abs/hep-th/0504039v3

JHEP 0506 (2005) 050

Physics

High Energy Physics

High Energy Physics - Theory

17 pages, v2: arguments on the correction terms expanded, references added, v3: minor corrections, to appear in JHEP

Scientific paper

10.1088/1126-6708/2005/06/050

We show that the BMN operators arise from the expansion of the Wilson loop in four-dimensional N=4 super Yang-Mills theory. The Wilson loop we consider is obtained from ``dimensional reduction'' of ten-dimensional N=1 super Yang-Mills theory, and it contains six scalar fields as well as the gauge field. We expand the Wilson loop twice. First we expand it in powers of the fluctuations around a BPS loop configuration. Then we further expand each term in the result of the first step in powers of the scalar field Z associated with the BPS configuration. We find that each operator in this expansion with large number of Z is the BMN operator. The number of fluctuations corresponds to the number of impurities, and the phase factor of each BMN operator is supplied correctly. We have to impose the BPS condition on the loop for obtaining the complete form of the BMN operators including the correction terms with \bar Z. Our observation suggests the correspondence between the Wilson loop and the string field.

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