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The entangling and disentangling power of unitary transformations are unequal
Noah Linden, John A. Smolin, Andreas Winter
We consider two capacity quantities associated with bipartite unitary gates: the entangling and the disentangling power. For two-qubit unitaries these two capacities are always the…
The Entanglement of Superpositions
Noah Linden, Sandu Popescu, John A. Smolin
Given a bipartite quantum state (in arbitrary dimension) and a decomposition of it as a superposition of two others, we find bounds on the entanglement of the superposition state i…
Information locking in black holes
John Smolin, Jonathan Oppenheim
The black hole information loss paradox has plagued physicists since Hawking's discovery that black holes evaporate thermally in contradiction to the unitarity expected by quantum…
Entanglement of assistance and multipartite state distillation
John A. Smolin, Frank Verstraete, Andreas Winter
We find that the asymptotic entanglement of assistance of a general bipartite mixed state is equal to the smaller of its two local entropies. Our protocol gives rise to the asympto…