量子隱形傳態(Quantum teleportation) 利用了量子量測與最大糾纏的愛因斯坦-波多爾斯基-羅森粒子對，完成於相隔兩地之間未知量子態的傳輸，對量子計算與量子資訊至關重要。一般普遍認知上，所有的糾纏態都能夠去展現所謂的“非古典隱形傳態’，而這樣的非古典隱形傳態不能被“量測-準備策略”(measure-prepare strategy)所模擬；於此，我們證明了並非所有的非古典隱形傳態皆為純然的量子力學過程。更準確地說，存在著更強的古典過程模型，而量測-準備策略是它的一個可被描述的特例；超越這樣的古典過程模型所能描述的過程意味著“真正的量子隱形傳態”，而其粒子對的狀態與量測皆具純然量子力學特性。我們證明了是量子操控性而非量子糾纏驅動了真正的量子隱形傳態。量子糾纏運用於量子隱形傳態上；而真正的多體糾纏可運用於多人參與的量子隱形傳態上，對此，我們從過程的角度，量化一個過程產生純的多體糾纏的能力。對於量子資訊處理，如遠端準備量子態協定(remote state preparation) 或是複合量子系統的量子隱形傳態，愛因斯坦-波多爾斯基-羅森粒子對也同樣是不可或缺；對這樣的量子資訊處理，我們的結果亦為實現可信賴的量子資訊任務提供了客觀與嚴謹的指標。

Quantum teleportation is a method for utilizing quantum measurements and the maximally entangled Einstein-Podolsky-Rosen (EPR) pair to transmit an unknown quantum state, which provides the power crucial for quantum computation and uantum information. It is well known that all entangled states demonstrate so-called “nonclassical teleportation” that cannot be simulated by the seminal classical measure-prepare strategy. Herein, we reveal that not all nonclassical teleportations are truly quantum-mechanical. Rather, there exists a stronger classical-teleportation model, which includes the measure-prepare procedure for teleportation as a special case, that can describe certain nonclassical teleportations. Invalidating such a classical model implies genuine quantum teleportation wherein both the pair state and the measurement are truly quantum-mechanical. We show that PR steering empowers genuine quantum teleportations, rather than entanglement. Our results show a compelling benchmark for implementing quantum-information processing where EPR pairs are indispensable, such as remote state preparation and general teleportation for composite quantum systems.

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