Splitting quantum information via six-qubit maximally entangled state

Abstract

Abstract:

Quantum information splitting (QIS) or quantum state sharing is the generalization of classical secret sharing schemes to the quantum scenario. In QIS, a piece of quantum information (in the form of a quantum state) is divided and distributed to a number of receivers.Propose a schemes of splitting two-qubit states by using six -particle maximally entangled state as the quantum channel. Alice first performs two Bell-basis measurement and announces her measurement outcome and assigns Charlie (Bob) to reconstruct the original unknown state. If the controllers Bob (Charlie) agree to help Charlie (Bob) obtain the original state, they should perform single-particle measurements on their respective qubits. After the sender performs Bell-basis measurements on her particles, and the cooperators operate single-particle measurements on their particles, the state receiver can reconstruct the original state of the sender by applying the appropriate unitary operation.

Key words: quantum information, splitting quantum information, six -particle maximally entangled state, Bell-basis measurement, entanglement swapping, unitary operation

CLC Number:

O431

TU Xiu-li, ZHANG Ting, WANG Xian-ming, XU Jing. Splitting quantum information via six-qubit maximally entangled state[J]. J4, 2012, 29(5): 577-583.

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