Details
| Original language | English |
|---|---|
| Pages (from-to) | 052329 |
| Number of pages | 1 |
| Journal | Phys. Rev. A |
| Volume | 83 |
| Publication status | Published - 1 May 2011 |
Abstract
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In: Phys. Rev. A, Vol. 83, 01.05.2011, p. 052329.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Strong Einstein-Podolsky-Rosen entanglement from a single squeezed light source
AU - Eberle, Tobias
AU - Händchen, Vitus
AU - Duhme, Jörg
AU - Franz, Torsten
AU - Werner, Reinhard F.
AU - Schnabel, Roman
PY - 2011/5/1
Y1 - 2011/5/1
N2 - Einstein-Podolsky-Rosen (EPR) entanglement is a criterion that is more demanding than just certifying entanglement. We theoretically and experimentally analyze the low resource generation of bi-partite continuous variable entanglement, as realized by mixing a squeezed mode with a vacuum mode at a balanced beam splitter, i.e. the generation of so-called vacuum-class entanglement. We find that in order to observe EPR entanglement the total optical loss must be smaller than 33.3 arbitrary strong EPR entanglement is generally possible with this scheme. We realize continuous wave squeezed light at 1550 nm with up to 9.9 dB of non-classical noise reduction, which is the highest value at a telecom wavelength so far. Using two phase controlled balanced homodyne detectors we observe an EPR co-variance product of 0.502 .006 <1, where 1 is the critical value. We discuss the feasibility of strong Gaussian entanglement and its application for quantum key distribution in a short-distance fiber network.
AB - Einstein-Podolsky-Rosen (EPR) entanglement is a criterion that is more demanding than just certifying entanglement. We theoretically and experimentally analyze the low resource generation of bi-partite continuous variable entanglement, as realized by mixing a squeezed mode with a vacuum mode at a balanced beam splitter, i.e. the generation of so-called vacuum-class entanglement. We find that in order to observe EPR entanglement the total optical loss must be smaller than 33.3 arbitrary strong EPR entanglement is generally possible with this scheme. We realize continuous wave squeezed light at 1550 nm with up to 9.9 dB of non-classical noise reduction, which is the highest value at a telecom wavelength so far. Using two phase controlled balanced homodyne detectors we observe an EPR co-variance product of 0.502 .006 <1, where 1 is the critical value. We discuss the feasibility of strong Gaussian entanglement and its application for quantum key distribution in a short-distance fiber network.
U2 - 10.1103/PhysRevA.83.052329
DO - 10.1103/PhysRevA.83.052329
M3 - Article
VL - 83
SP - 052329
JO - Phys. Rev. A
JF - Phys. Rev. A
SN - 2469-9934
ER -