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Results tagged with ghosts
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user 8821
Ghosts are unphysical states that arise when quantizing gauge theories. Do not use this tag for 'ghosts' in the paranormal sense.
2
votes
Accepted
What constrains ghost fields $c^+$ and $b_{++}$ as $z$ going to infinity
The behaviour of a vector field $v^z$ at $z=\infty$ can be described by first moving to coordinates that are well-defined in that coordinate patch. Defining $w = \frac{1}{z}$, we find
$$
c^w = \frac{d …
- 27.7k
3
votes
Weyl Anomaly for Old Covariant Quantization in String Theory?
In lightcone quantization the mass of a level $N$ state is given by $m^2 \sim ( N - \frac{D-2}{24} )$. The $N=1$ transforms in a rep of $SO(D-2)$. This is because in lightcone quantization there are $ …
- 27.7k
3
votes
Accepted
Ghost Theory energy-momentum tensor CFT
If you wish to determine the stress tensor from the action, you will need to know how the $bc$ ghost system couples to gravity. To figure this out, we recall that the action arose from the BRST gauge …
- 27.7k
9
votes
Accepted
Energy-momentum tensor of Bosonic Ghost Action in String Theory
Here's part of my answer to the derivation of the EM tensor for the ghost action. It does not match the expression you gave, but I may have made a mistake. Can you check my work?
We start with the act …
- 27.7k