Optimal realization of the transposition maps
arXiv:quant-ph/0304175 · doi:10.1016/S0375-9601(03)00954-X
Abstract
We solve the problem of achieving the optimal physical approximation of the transposition for pure states of arbitrary quantum systems for finite and infinite dimensions. A unitary realization is also given for any finite dimension, which provides the optimal quantum cloning map of the ancilla as well.
10 pages. No figures. Elsart style