Distillable entanglement is continuous

We prove continuity of distillable entanglement, the optimal asymptotic rate at which copies of a bipartite state can be converted into maximally entangled pairs by local operations and classical communication (LOCC) with vanishing error. We establish an explicit asymptotic continuity bound that holds for arbitrary bipartite states and depends logarithmically on the system dimension. This bound has the same structure as known continuity bounds for conditional entropy, entanglement cost, and relative entropy of entanglement. Our proof constructs an explicit LOCC protocol that converts either of two arbitrary bipartite states into the other at an ebit cost that vanishes as their trace distance tends to zero.

Source: arXiv:2610.35722v1 - http://arxiv.org/abs/2610.35722v1 PDF: https://arxiv.org/pdf/2610.35722v1 Original Link: http://arxiv.org/abs/2610.35722v1