|
| related topics |
| {information, entropy, channel} |
| {error, code, errors} |
| {measurement, state, measurements} |
| {states, state, optimal} |
| {time, decoherence, evolution} |
| {let, theorem, proof} |
| {state, phys, rev} |
| {operator, operators, space} |
| {qubit, qubits, gate} |
| {state, algorithm, problem} |
| {observables, space, algebra} |
|
On quantum error-correction by classical feedback in discrete time
M. Gregoratti, R. F. Werner
abstract: We consider the problem of correcting the errors incurred from sending
quantum information through a noisy quantum environment by using classical
information obtained from a measurement on the environment. For discrete time
Markovian evolutions, in the case of fixed measurement on the environment, we
give criteria for quantum information to be perfectly corrigible and
characterize the related feedback. Then we analyze the case when perfect
correction is not possible and, in the qubit case, we find optimal feedback
maximizing the channel fidelity.
- oai_identifier:
- oai:arXiv.org:quant-ph/0403092
- categories:
- quant-ph
- comments:
- 11 pages, 1 figure, revtex4
- doi:
- 10.1063/1.1758320
- arxiv_id:
- quant-ph/0403092
- created:
- 2004-03-12
Full article ▸
|
|
| related documents |
| 9611032v1 |
| 9806027v2 |
| 0203045v1 |
| 0702059v3 |
| 9512022v3 |
| 9805017v1 |
| 0209030v1 |
| 0408004v2 |
| 0511217v1 |
| 0112034v1 |
| 0506197v3 |
| 0207010v1 |
| 0412157v1 |
| 0511171v1 |
| 0409026v1 |
| 0611070v1 |
| 0409187v1 |
| 0701149v3 |
| 0611058v2 |
| 0502093v1 |
| 0202119v2 |
| 0512037v2 |
| 0412083v1 |
| 0603024v2 |
| 0403188v1 |
|