 Nambu-Goto phase-space action

ID: nambu-goto-phase-space-action

The first-order string action is

I = \int d t d σ [\dot{X} \cdot P - \frac{e}{2} (P^{2} + T^{2} X^{'2}) - u X^{'} \cdot P] .

The multipliers impose the two Virasoro constraints. The canonical equations give a spatial momentum flux

J_{m} = e T^{2} X_{m}^{'} + u P_{m}

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