|
| related topics |
| {states, state, optimal} |
| {qubit, qubits, gate} |
| {state, phys, rev} |
| {state, states, entangled} |
| {phase, path, phys} |
| {alice, bob, state} |
| {state, algorithm, problem} |
| {trap, ion, state} |
| {time, decoherence, evolution} |
| {cos, sin, state} |
| {entanglement, phys, rev} |
|
Sequential Quantum Cloning
Y. Delgado, L. Lamata, J. Leon, D. Salgado, E. Solano
abstract: Not all unitary operations upon a set of qubits can be implemented by
sequential interactions between each qubit and an ancillary system. We analyze
the specific case of sequential quantum cloning 1->M and prove that the minimal
dimension D of the ancilla grows linearly with the number of clones M. In
particular, we obtain D = 2M for symmetric universal quantum cloning and D =
M+1 for symmetric phase-covariant cloning. Furthermore, we provide a recipe for
the required ancilla-qubit interactions in each step of the sequential
procedure for both cases.
- oai_identifier:
- oai:arXiv.org:quant-ph/0607105
- categories:
- quant-ph
- comments:
- 4 pages, no figures. New version with changes. Accepted in Physical
Review Letters
- arxiv_id:
- quant-ph/0607105
- journal_ref:
- Phys. Rev. Lett. 98, 150502 (2007).
- created:
- 2006-07-15
- updated:
- 2007-03-08
Full article ▸
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