|
| related topics |
| {information, entropy, channel} |
| {photon, photons, single} |
| {key, protocol, security} |
| {light, field, probe} |
| {group, space, representation} |
| {time, systems, information} |
| {vol, operators, histories} |
| {cos, sin, state} |
| {error, code, errors} |
| {entanglement, phys, rev} |
| {alice, bob, state} |
|
Quantum Theory and Classical Information
Göran Einarsson
abstract: Transmission of classical information using quantum objects such as polarized
photons is studied. The classical (Shannon) channel capacity and its relation
to quantum (von Neumann) channel capacity is investigated for various receiver
arrangements.
A quantum channel with transmission impairment caused by attenuation and
random polarization noise is considered. It is shown that the maximal (von
Neumann) capacity of such a channel can be realized by a simple symbol by
symbol detector followed by a classical error correcting decoder.
For an intensity limited optical channel capacity is achieved by on-off
keying (OOK). The capacity per unit cost is shown to be 1 nat/photon = 1.44
bit/photon, slightly larger than the 1 bit/photon obtained by orthogonal
quantum signals.
- oai_identifier:
- oai:arXiv.org:quant-ph/0202119
- categories:
- quant-ph
- comments:
- 20 pages, 9 figures, added material in 4.2 On-Off Keying (OOK)
- arxiv_id:
- quant-ph/0202119
- created:
- 2002-02-21
- updated:
- 2002-09-03
Full article ▸
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