Half the entanglement in critical systems is distillable from a single specimen
Half the entanglement in critical systems is distillable from a single specimen
We establish a quantitative relationship between the entanglement content of a single quantum chain at a critical point and the corresponding entropy of entanglement. We find that, surprisingly, the leading critical scaling of the single-copy entanglement with respect to any bipartitioning is exactly one-half of the entropy of entanglement, in …