- #1
earth2
- 86
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Hey guys,
i just started taking a course on ST and so far we discuss the closed string following Green, Schwarz, Witten.
I don't see the point of constructing the Virasoro algebra (formula 2.1.85 in GSW) if the corresponding generators are zero due to the constraints. Or to put it differently, they are defined by
[tex]L_m\propto \int e^{...m} T_{--}d\sigma[/tex] but by the constraints on the system we have T_{--}=0 (similarly for the barred generator). In other words: i don't understand why we deal with the L's if they are zero anyways?
Hope someone can enlighten me on that...
Cheers,
earth2
i just started taking a course on ST and so far we discuss the closed string following Green, Schwarz, Witten.
I don't see the point of constructing the Virasoro algebra (formula 2.1.85 in GSW) if the corresponding generators are zero due to the constraints. Or to put it differently, they are defined by
[tex]L_m\propto \int e^{...m} T_{--}d\sigma[/tex] but by the constraints on the system we have T_{--}=0 (similarly for the barred generator). In other words: i don't understand why we deal with the L's if they are zero anyways?
Hope someone can enlighten me on that...
Cheers,
earth2
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