Abstract
Entangled-photon sources with simultaneously near-unity heralding efficiency and indistinguishability are the fundamental elements for scalable photonic quantum technologies. We design and realize a degenerate telecommunication wavelength entangled-photon source from an ultrafast pulsed laser pumped spontaneous parametric down-conversion (SPDC), which shows simultaneously 97% heralding efficiency and 96% indistinguishability between independent single photons without narrow-band filtering. Such a beamlike and frequency-uncorrelated SPDC source allows generation of the first 12-photon genuine entanglement with a state fidelity of
0.572
±
0.024
. We further demonstrate a blueprint of scalable scattershot boson sampling using 12 SPDC sources and a
12
×
12
mode interferometer for three-, four-, and five-boson sampling, which yields count rates more than 4 orders of magnitude higher than all previous SPDC experiments.
0.572
±
0.024
. We further demonstrate a blueprint of scalable scattershot boson sampling using 12 SPDC sources and a
12
×
12
mode interferometer for three-, four-, and five-boson sampling, which yields count rates more than 4 orders of magnitude higher than all previous SPDC experiments.
| Original language | Others/Unknown |
|---|---|
| Pages (from-to) | 250505 |
| Number of pages | 1 |
| Journal | Physical Review Letters |
| Volume | 121 |
| Issue number | 25 |
| Publication status | Published - Dec 2018 |