Analysis of N-qubit perfectly controlled teleportation schemes from the controller's point of view

Abstract

We quantitatively analyze and evaluate the controller's power in $N$-qubit controlled teleportation schemes. We calculate the minimum control power required to ensure the controller's authority such that the teleportation fidelity without the controller's permission is no more than the classical bound. We revisit several typical controlled teleportation schemes from the controller's point of view and evaluate the control power in these schemes. We find that for teleporting arbitrary N-qubit states, each controller should control at least N bits of useful information to ensure his/her authority over the protocol. We also discuss the general rules that must be satisfied by controlled teleportation schemes to ensure both teleportation fidelity and control power.

5 pages

References in corpus (5)

• Experimental quantum teleportation
• Symmetric multiparty-controlled teleportation of an arbitrary two-particle entanglement
• Optimal Controlled Teleportation
• Controlled Teleportation of an Arbitrary Multi-Qudit State in a General Form with d-Dimensional Greenberger-Horne-Zeilinger States
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Cited by in corpus (3)

• Generalization of port-based teleportation and controlled teleportation capability
• Controlled remote implementation of operations via graph states
• Flying-cat parity checks for quantum error correction