Efficient multi port-based teleportation schemes

Understand

In this manuscript we analyse generalised port-based teleportation (PBT) schemes, allowing for transmitting more than one unknown quantum state (or a composite quantum state) in one go, where the state ends up in several ports at Bob's side.

• We investigate the efficiency of our scheme discussing both deterministic and probabilistic case, where parties share maximally entangled states.
• It turns out that the new scheme gives better performance than various variants of the optimal PBT protocol used for the same task.
• All the results are presented in group-theoretic manner depending on such quantities like dimensions and multiplicities of irreducible representations in the Schur-Weyl duality.