Physics

By representing the potentially unstable bound states as multi-centered black hole solutions in N=2 supergravity, we provide explicit formula for the change in the (refined) index across a wall of marginal stability. The main physical insight behind...

We develop the idea of an effective conformal theory describing the low-lying spectrum of the dilatation operator in a CFT. Such an effective theory is useful when the spectrum contains a hierarchy in the dimension of operators, and a small...