Quantum-information theory is used to analyze various nonlinear operations on quantum states. The universal disentanglement machine is shown to be impossible, and partial (negative) results are obtained in the state-dependent case. The efficiency of the transformation of nonorthogonal states into orthogonal ones is discussed.
|Number of pages||5|
|Journal||Physical Review A - Atomic, Molecular, and Optical Physics|
|Publication status||Published - 1999|