|
| related topics |
| {states, state, optimal} |
| {phase, path, phys} |
| {state, phys, rev} |
| {key, protocol, security} |
| {alice, bob, state} |
| {group, space, representation} |
| {information, entropy, channel} |
| {equation, function, exp} |
|
Asymmetric phase-covariant d-dimensional cloning
L. -P. Lamoureux, N. J. Cerf
abstract: We consider cloning transformations of d-dimensional states of the form
e^{i\phi_0}|0> + e^{i\phi_1}|1> +...+ e^{i\phi_{d-1}}|d-1> that are covariant
with respect to rotations of the phases \phi_i's. The optimal cloning maps are
easily obtained using a well-defined general characterization of
state-dependent 1 -> 2 cloning transformations in arbitrary dimensions. Our
results apply to symmetric as well as asymmetric cloners, so that the balance
between the fidelity of the two clones can be analyzed.
- oai_identifier:
- oai:arXiv.org:quant-ph/0410054
- categories:
- quant-ph
- comments:
- Accepted for publication in Quantum Information and Communication
- arxiv_id:
- quant-ph/0410054
- journal_ref:
- Quantum Information and Computation - Vol. 5, No. 1 (2005)
032-039
- created:
- 2004-10-07
Full article ▸
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