|
| related topics |
| {state, states, coherent} |
| {measurement, state, measurements} |
| {state, phys, rev} |
| {alice, bob, state} |
| {photon, photons, single} |
|
Fidelity and information in the quantum teleportation of continuous
variables
Holger F. Hofmann, Toshiki Ide, Takayoshi Kobayashi, Akira Furusawa
abstract: Ideally, quantum teleportation should transfer a quantum state without
distortion and without providing any information about that state. However,
quantum teleportation of continuous electromagnetic field variables introduces
additional noise, limiting the fidelity of the quantum state transfer. In this
article, the operator describing the quantum state transfer is derived. The
transfer operator modifies the probability amplitudes of the quantum state in a
shifted photon number base by enhancing low photon numbers and suppressing high
photon numbers. This modification of the statistical weight corresponds to a
measurement of finite resolution performed on the original quantum state. The
limited fidelity of quantum teleportation is thus shown to be a direct
consequence of the information obtained in the measurement.
- oai_identifier:
- oai:arXiv.org:quant-ph/0003053
- categories:
- quant-ph physics.optics
- comments:
- 10 pages, including one figure, minor clarifications and added
reference
- doi:
- 10.1103/PhysRevA.62.062304
- arxiv_id:
- quant-ph/0003053
- journal_ref:
- Phys. Rev. A 62, 062304 (2000)
- created:
- 2000-03-15
- updated:
- 2000-06-06
Full article ▸
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