Develops resource theory of quantum secret key, proving regularized key of formation upper-bounds key cost and regularized relative entropy of entanglement lower-bounds it, with irreversibility and single-shot yield-cost relations.
After these steps, both of them have to swap systems eA′ and A′ to obtain a corrected shield in system A′ and the state |⊥⟩⊗(n+Lmax) in systems eA′ and TA′
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Cost of quantum secret key
Develops resource theory of quantum secret key, proving regularized key of formation upper-bounds key cost and regularized relative entropy of entanglement lower-bounds it, with irreversibility and single-shot yield-cost relations.