Journal
NATURE PHYSICS
Volume 7, Issue 1, Pages 13-16Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/NPHYS1819
Keywords
-
Categories
Funding
- EU
- Engineering and Physical Sciences Research Council [EP/E036473/1] Funding Source: researchfish
- EPSRC [EP/E036473/1] Funding Source: UKRI
Ask authors/readers for more resources
A quantum memory for light is a key element for the realization of future quantum information networks(1-3). Requirements for a good quantum memory are versatility (allowing a wide range of inputs) and preservation of quantum information in a way unattainable with any classical memory device. Here we demonstrate such a quantum memory for continuous-variable entangled states, which play a fundamental role in quantum information processing(4-6). We store an extensive alphabet of two-mode 6.0 dB squeezed states obtained by varying the orientation of squeezing and the displacement of the states. The two components of the entangled state are stored in two room-temperature cells separated by 0.5 m, one for each mode, with a memory time of 1 ms. The true quantum character of the memory is rigorously proved by showing that the experimental memory fidelity 0.52 +/- 0.02 significantly exceeds the benchmark of 0.45 for the best possible classical memory for a range of displacements.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available