Exact Solution of the Heinsenberg-Kondo Quantum Spin Glass, Showing that an Infinite Order Quantum Phase Transition Occurs Between the Quantum Spin Glass and Kondo Spin Quenched Phases at a Temperature of Order Ten Times Lower than that Given by Mean Fi

We have exactly solved the Heisenberg-Kondo model of a quantum spin glass, showing that an infinite order phase transition occurs between the quantum spin glass phase and the Kondo spin quenched phase at a temperature $T_c $ of an order of magnitude smaller than that given by mean field theory, which predicts a fast order phase transition. The phase diagram will be presented as a function of the ratio of the Kondo exchange $J^K$and Heisenberg exchange $J^H$ divided by the Fermion band width $W$.