Register For Free. Consider the scenario where Alice and Bob send systems to each other by choosing between two possible channels, forward or backward , and performing adaptive LOCC after each single transmission see also Fig. A 99 , — As shown in Fig. The relaxation of such constraints has also practical reasons since it approximates the working regime of current QKD protocols, that exploit large data blocks and high-energy Gaussian modulations 13 , Electrons are no longer thought of as being randomly distributed around a nucleus or restricted to certain orbits in that regard, Bohr was wrong. Hence these parameters must be found for each system to be analyzed. Let us characterize the set of teleportation unitaries for a qudit of dimension d.