|
| related topics |
| {photon, photons, single} |
| {states, state, optimal} |
| {state, phys, rev} |
| {light, field, probe} |
| {spin, pulse, spins} |
| {time, systems, information} |
| {particle, mechanics, theory} |
| {qubit, qubits, gate} |
|
Experimental Quantum Cloning of Single Photons
Antia Lamas-Linares, Christoph Simon, John C. Howell, Dik Bouwmeester
abstract: Although perfect copying of unknown quantum systems is forbidden by the laws
of quantum mechanics, approximate cloning is possible. A natural way of
realizing quantum cloning of photons is by stimulated emission. In this context
the fundamental quantum limit to the quality of the clones is imposed by the
unavoidable presence of spontaneous emission. In our experiment a single input
photon stimulates the emission of additional photons from a source based on
parametric down-conversion. This leads to the production of quantum clones with
near optimal fidelity. We also demonstrate universality of the copying
procedure by showing that the same fidelity is achieved for arbitrary input
states.
- oai_identifier:
- oai:arXiv.org:quant-ph/0205149
- categories:
- quant-ph
- comments:
- 4 pages, 2 figures
- doi:
- 10.1126/science.1068972
- arxiv_id:
- quant-ph/0205149
- journal_ref:
- Science 296, 712 (2002)
- created:
- 2002-05-23
Full article ▸
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