The semi-classical energy of closed Nambu-Goto strings

15 Nov 2019 · Kozoň Marek, Zahn Jochen ·

We compute semi-classical corrections to the energy of rotating closed Nambu-Goto strings. We confirm the results obtained by means of the Polchinski-Strominger action. We also show that in this semi-classical approximation, the spectrum of physical excitations contains modes that are unphysical non-perturbatively, i.e., to which no physical excitations of the covariantly quantized Nambu-Goto string correspond.

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The semi-classical energy of closed Nambu-Goto strings

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