Entanglement between more than two hundred macroscopic atomic ensembles in a solid
Abstract
We create a multi-partite entangled state by storing a single photon in a crystal that contains many large atomic ensembles with distinct resonance frequencies. The photon is re-emitted at a well-defined time due to an interference effect analogous to multi-slit diffraction. We derive a lower bound for the number of entangled ensembles based on the contrast of the interference and the single-photon character of the input, and we experimentally demonstrate entanglement between over two hundred ensembles, each containing a billion atoms. In addition, we illustrate the fact that each individual ensemble contains further entanglement. Our results are the first demonstration of entanglement between many macroscopic systems in a solid and open the door to creating even more complex entangled states.
Cite
@article{arxiv.1703.04709,
title = {Entanglement between more than two hundred macroscopic atomic ensembles in a solid},
author = {P. Zarkeshian and C. Deshmukh and N. Sinclair and S. K. Goyal and G. H. Aguilar and P. Lefebvre and M. Grimau Puigibert and V. B. Verma and F. Marsili and M. D. Shaw and S. W. Nam and K. Heshami and D. Oblak and W. Tittel and C. Simon},
journal= {arXiv preprint arXiv:1703.04709},
year = {2017}
}
Comments
10 pages, 8 figures; see also parallel submission by Frowis et al