|
| related topics |
| {states, state, optimal} |
| {state, states, entangled} |
| {entanglement, phys, rev} |
| {alice, bob, state} |
| {state, phys, rev} |
| {classical, space, random} |
| {energy, state, states} |
| {phase, path, phys} |
|
Usefulness of classical communication for local cloning of entangled
states
Rafal Demkowicz-Dobrzanski, Maciej Lewenstein, Aditi Sen De, Ujjwal Sen, Dagmar Bruss
abstract: We solve the problem of the optimal cloning of pure entangled two-qubit
states with a fixed degree of entanglement using local operations and classical
communication. We show, that amazingly, classical communication between the
parties can improve the fidelity of local cloning if and only if the initial
entanglement is higher than a certain critical value. It is completely useless
for weakly entangled states. We also show that bound entangled states with
positive partial transpose are not useful as a resource to improve the best
local cloning fidelity.
- oai_identifier:
- oai:arXiv.org:quant-ph/0502103
- categories:
- quant-ph
- comments:
- 6 pages, RevTeX4, 2 figures, published version
- doi:
- 10.1103/PhysRevA.73.032313
- arxiv_id:
- quant-ph/0502103
- journal_ref:
- Phys. Rev. A 73, 032313 (2006)
- created:
- 2005-02-16
- updated:
- 2006-03-23
Full article ▸
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