Given two pure bipartite quantum states |ψ\rangle and |φ\rangle, Nielsen’s theorem states that |ψ\rangle can be exactly transformed into |φ\rangle via local quantum operations and classical communication (LOCC), if and only if P\preceq Q (P is majorized by Q). Here P and Q are the squared Schmidt coefficients of |ψ\rangle and |φ\rangle, respectively. From a quantum resource theory perspective, this motivates determining for which P and Q the relation P^{\otimes N}\preceq Q^{\otimes N} holds for large N, as this relates to asymptotic extraction rates between quantum states. This talk explores and provides a solution to this problem, yielding an expression for the exact asymptotic extraction rate between pure bipartite states: \min_{\alpha\in [0,\infty]}\frac{H_\alpha(P)}{H_\alpha(Q)}.
Asymptotic majorization of probability distributions and LOCC transformations
Időpont:
2018. 10. 17. 16:00
Hely:
H306
Előadó:
Asger Kjærulff Jensen