We know that a free scalar field on a diff-invariant 1+1 dimensional background (i.e. bosonic string theory on the worldsheet) contributes to the central charge of the Virasoro algebra with a constant term.(adsbygoogle = window.adsbygoogle || []).push({});

Is there any examples of a 1+1d QFT that has instead a central charge contribution that diverges when the regularization cut off is removed in the canonical quantization approach?

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# A diff-invariant 1+1d QFT with divergent central charge?

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