Details
| Original language | English |
|---|---|
| Pages (from-to) | 070501 |
| Number of pages | 1 |
| Journal | Phys. Rev. Lett. |
| Volume | 95 |
| Issue number | 7 |
| Publication status | Published - 2005 |
Abstract
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In: Phys. Rev. Lett., Vol. 95, No. 7, 2005, p. 070501.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Non-Gaussian cloning of quantum coherent states is optimal
AU - Cerf, N. J.
AU - Krüger, O
AU - Navez, P
AU - Werner, R. F.
AU - Wolf, M. M.
PY - 2005
Y1 - 2005
N2 - We consider the optimal cloning of quantum coherent states with single-clone and joint fidelity as figures of merit. While the latter is maximized by a Gaussian cloner, the former is not: the optimal single-clone fidelity for a symmetric 1-to-2 cloner is 0.6826, compared to 2/3 in a Gaussian setting. This cloner can be realized with an optical parametric amplifier and certain non-Gaussian bimodal states. Finally, we show that the single-clone fidelity of the optimal 1-to-infinity cloner is 1/2. It is achieved by a Gaussian scheme and cannot be surpassed even with supplemental bound entangled states.
AB - We consider the optimal cloning of quantum coherent states with single-clone and joint fidelity as figures of merit. While the latter is maximized by a Gaussian cloner, the former is not: the optimal single-clone fidelity for a symmetric 1-to-2 cloner is 0.6826, compared to 2/3 in a Gaussian setting. This cloner can be realized with an optical parametric amplifier and certain non-Gaussian bimodal states. Finally, we show that the single-clone fidelity of the optimal 1-to-infinity cloner is 1/2. It is achieved by a Gaussian scheme and cannot be surpassed even with supplemental bound entangled states.
U2 - 10.1103/PhysRevLett.95.070501
DO - 10.1103/PhysRevLett.95.070501
M3 - Article
VL - 95
SP - 070501
JO - Phys. Rev. Lett.
JF - Phys. Rev. Lett.
IS - 7
ER -