Decoherence, Pointer Engineering, and Quantum State Protection
Andre R. R. Carvalho, P. Milman, R. L. de Matos Filho, L. Davidovich · Physical Review Letters · 2001
We present a proposal for protecting states against decoherence, based on the engineering of pointer states. We apply this procedure to the vibrational motion of a trapped ion, and show how to protect qubits, squeezed states, approximate phase eigenstates, and superpositions of coherent states.