Coherence protection by the quantum Zeno effect and non-holonomic   control in a Rydberg Rubidium isotope
  The protection of the coherence of open quantum systems against the influence of their environment is a very topical issue. A scheme is proposed here which protects a general quantum system from the action of a set of arbitrary uncontrolled unitary evolutions. This method draws its inspiration from ideas of standard error-correction (ancilla adding, coding and decoding) and the Quantum Zeno Effect. A pedagogical demonstration of our method on a simple atomic system, namely a Rubidium isotope, is proposed. 
E. Brion, V.M. Akulin, D. Comparat, I. Dumer, G. Harel, N. Kebaili, G.   Kurizki, I. Mazets and P. Pillet