Details
| Original language | English |
|---|---|
| Article number | 150503 |
| Journal | Physical Review Letters |
| Volume | 94 |
| Issue number | 15 |
| Publication status | Published - 22 Apr 2005 |
| Externally published | Yes |
Abstract
We consider the storage and transmission of a Gaussian distributed set of coherent states of continuous variable systems. We prove a limit on the average fidelity achievable when the states are transmitted or stored by a classical channel, i.e., a measure and repreparation scheme which sends or stores classical information only. The obtained bound is tight and serves as a benchmark which has to be surpassed by quantum channels in order to outperform any classical strategy. The success in experimental demonstrations of quantum memories as well as quantum teleportation has to be judged on this footing.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- General Physics and Astronomy
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In: Physical Review Letters, Vol. 94, No. 15, 150503, 22.04.2005.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Quantum benchmark for storage and transmission of coherent states
AU - Hammerer, Klemens
AU - Wolf, Michael
AU - Polzik, Eugene S.
AU - Cirac, J. I.
PY - 2005/4/22
Y1 - 2005/4/22
N2 - We consider the storage and transmission of a Gaussian distributed set of coherent states of continuous variable systems. We prove a limit on the average fidelity achievable when the states are transmitted or stored by a classical channel, i.e., a measure and repreparation scheme which sends or stores classical information only. The obtained bound is tight and serves as a benchmark which has to be surpassed by quantum channels in order to outperform any classical strategy. The success in experimental demonstrations of quantum memories as well as quantum teleportation has to be judged on this footing.
AB - We consider the storage and transmission of a Gaussian distributed set of coherent states of continuous variable systems. We prove a limit on the average fidelity achievable when the states are transmitted or stored by a classical channel, i.e., a measure and repreparation scheme which sends or stores classical information only. The obtained bound is tight and serves as a benchmark which has to be surpassed by quantum channels in order to outperform any classical strategy. The success in experimental demonstrations of quantum memories as well as quantum teleportation has to be judged on this footing.
UR - http://www.scopus.com/inward/record.url?scp=18144431029&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.94.150503
DO - 10.1103/PhysRevLett.94.150503
M3 - Article
AN - SCOPUS:18144431029
VL - 94
JO - Physical Review Letters
JF - Physical Review Letters
SN - 0031-9007
IS - 15
M1 - 150503
ER -