|
| related topics |
| {photon, photons, single} |
| {key, protocol, security} |
| {bell, inequality, local} |
| {wave, scattering, interference} |
| {state, phys, rev} |
| {qubit, qubits, gate} |
| {state, states, coherent} |
| {alice, bob, state} |
| {error, code, errors} |
| {cavity, atom, atoms} |
|
Experimental Quantum Cryptography with Qutrits
Simon Groeblacher, Thomas Jennewein, Alipasha Vaziri, Gregor Weihs, Anton Zeilinger
abstract: We produce two identical keys using, for the first time, entangled trinary
quantum systems (qutrits) for quantum key distribution. The advantage of
qutrits over the normally used binary quantum systems is an increased coding
density and a higher security margin. The qutrits are encoded into the orbital
angular momentum of photons, namely Laguerre-Gaussian modes with azimuthal
index l +1, 0 and -1, respectively. The orbital angular momentum is controlled
with phase holograms. In an Ekert-type protocol the violation of a
three-dimensional Bell inequality verifies the security of the generated keys.
A key is obtained with a qutrit error rate of approximately 10 %.
- oai_identifier:
- oai:arXiv.org:quant-ph/0511163
- categories:
- quant-ph
- comments:
- New version includes additional references and a few minor changes to
the manuscript
- doi:
- 10.1088/1367-2630/8/5/075
- arxiv_id:
- quant-ph/0511163
- journal_ref:
- New J. Phys. 8 (2006) 75
- created:
- 2005-11-16
- updated:
- 2006-06-13
Full article ▸
|
|
| related documents |
| 0610096v2 |
| 0611041v1 |
| 0509211v1 |
| 0609005v1 |
| 0607189v3 |
| 0503215v1 |
| 0310042v2 |
| 0406138v1 |
| 0502067v1 |
| 0608156v1 |
| 0106121v2 |
| 0507178v2 |
| 0507239v1 |
| 0605002v1 |
| 0303184v1 |
| 0610258v1 |
| 0701079v1 |
| 9610033v1 |
| 0607223v1 |
| 0612033v1 |
| 0606242v3 |
| 0507024v1 |
| 0703193v2 |
| 0507194v1 |
| 0701198v1 |
|