|
| related topics |
| {states, state, optimal} |
| {measurement, state, measurements} |
| {state, phys, rev} |
| {cos, sin, state} |
| {information, entropy, channel} |
| {light, field, probe} |
| {state, states, coherent} |
| {error, code, errors} |
| {key, protocol, security} |
|
Information-Disturbance Tradeoff in Quantum State Discrimination
Francesco Buscemi, Massimiliano F. Sacchi
abstract: When discriminating between two pure quantum states, there exists a
quantitative tradeoff between the information retrieved by the measurement and
the disturbance caused on the unknown state. We derive the optimal tradeoff and
provide the corresponding quantum measurement. Such an optimal measurement
smoothly interpolates between the two limiting cases of maximal information
extraction and no measurement at all.
- oai_identifier:
- oai:arXiv.org:quant-ph/0610196
- categories:
- quant-ph
- comments:
- 5 pages, 2 (low-quality) figures. Eq. (20) corrected. Final published
version
- doi:
- 10.1103/PhysRevA.74.052320
- arxiv_id:
- quant-ph/0610196
- journal_ref:
- Phys. Rev. A 74, 052320 (2006)
- created:
- 2006-10-23
- updated:
- 2006-11-14
Full article ▸
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