Details
| Original language | English |
|---|---|
| Pages (from-to) | 2600-2612 |
| Number of pages | 13 |
| Journal | J. Math. Phys. |
| Volume | 45 |
| Issue number | 7 |
| Publication status | Published - 2004 |
Abstract
Cite this
- Standard
- Harvard
- Apa
- Vancouver
- BibTeX
- RIS
In: J. Math. Phys., Vol. 45, No. 7, 2004, p. 2600-2612.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - On quantum error-correction by classical feedback in discrete time
AU - Gregoratti, M.
AU - Werner, R. F.
PY - 2004
Y1 - 2004
N2 - 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.
AB - 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.
U2 - 10.1063/1.1758320
DO - 10.1063/1.1758320
M3 - Article
VL - 45
SP - 2600
EP - 2612
JO - J. Math. Phys.
JF - J. Math. Phys.
SN - 1089-7658
IS - 7
ER -