Linear dilaton conformal field theory
= Linear dilaton conformal field theory
A linear dilaton conformal field theory improves the free-boson stress tensor by a second derivative, $T=-\alpha'^{-1}:\!\partial X\partial X\!:-q\partial^2X$. The improvement shifts the <central charge> to $c=1+6\alpha'q^2$ and corresponds to a dilaton linear in the target coordinate $X$.