Quantum information reclaiming after amplitude damping
Laleh Memarzadeh, Carlo Cafaro, Stefano Mancini · Journal of Physics A Mathematical and Theoretical · 2011
We design an effective method to investigate the quantum information reclaim from the environment after amplitude damping has occurred. In particular, we address the question of optimal measurement on the environment to perform the best possible correction on two- and three-dimensional quantum systems. While for qubits we show that the entanglement fidelity is the same for all possible measurements, for qutirits we find that different measurements give rise to different values of the entanglement fidelity. By searching over all possible measurements on the environment we uncover the optimal one leading to the maximum entanglement fidelity.