High-efficiency nondistortion quantum interrogation of atoms in quantum superpositions
Xingxiang Zhou, Zheng-Wei Zhou, Guang‐Can Guo, M. J. Feldman · Physical Review A · 2001
We consider the nondistortion quantum interrogation of an atom prepared in a quantum superposition. By manipulating the polarization of the probe photon and making connections to interaction-free measurements of opaque objects, we show that nondistortion interrogation of an atom in a quantum superposition can be done with efficiency approaching unity. However, if any component of the atom's superposition is completely transparent to the probe wave function, a nondistortion interrogation of the atom is impossible.