  The dynamics of a bilayer system of ultracold dipolar molecules exhibits
classical and quantum glassy behavior, characterized by long tails in the
relaxation time and dynamical heterogeneity. In the proposed setup, quantum
fluctuations are of the order of thermal fluctuations and the degree of
frustration can tuned by the interlayer distance. We present experimental
accessible order parameters based on marker molecules, distinguished by
properly chosen internal levels, and find quantum features of dynamical
heterogeneity.
