Optimal Entanglement Generation from Quantum Operations

Authors

Matthew S. Leifer, Chapman UniversityFollow
L. Henderson, University of Bristol
N. Linden, University of Bristol

Document Type

Article

Publication Date

2003

Abstract

We consider how much entanglement can be produced by a nonlocal two-qubit unitary operation, UAB—the entangling capacity of U_AB. For a single application of U_AB , with no ancillas, we find the entangling capacity and show that it generally helps to act with U_AB on an entangled state. Allowing ancillas, we present numerical results from which we can conclude, quite generally, that allowing initial entanglement typically increases the optimal capacity in this case as well. Next, we show that allowing collective processing does not increase the entangling capacity if initial entanglement is allowed.

Comments

This article was originally published in Physical Review A, volume 67, in 2003. DOI: 10.1103/PhysRevA.67.012306

Recommended Citation

Leifer, M.S., Henderson, L., Linden, N., 2003. Optimal entanglement generation from quantum operations. Phys. Rev. A 67, 012306. doi:10.1103/PhysRevA.67.012306

Peer Reviewed

1

Copyright

American Physical Society