Quantum (in)stability of 2D charged dilaton black holes due to back-reaction of dilaton coupled scalars

The quantum properties of charged black holes (BHs) found by McGuigan, Nappi and Yost are studied in 2D dilaton-Maxwell gravity (spontaneously compactificated from heterotic string) with $N$ dilaton coupled scalars. Working in large $N$ approach we discuss the presence of stable (evaporating) and unstable (anti-evaporating) modes in the spectrum of quantum-corrected BH. It is proved that charged 2D BHs (or spherically reduced 4D and 5D BHs) may not only evaporate but also anti-evaporate. Higher modes may cause the disintegration of BH in accordance with recent observation by Bousso. Quantum corrections to horizon radius, mass, charge, temperature and entropy of 2D BHs are calculated. Using duality above parameters may be connected with characteristics of stringy 5D BH