| Download | - View final version: Entanglement between more than two hundred macroscopic atomic ensembles in a solid (PDF, 1.1 MiB)
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| DOI | Resolve DOI: https://doi.org/10.1038/s41467-017-00897-7 |
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| Author | Search for: Zarkeshian, P.; Search for: Deshmukh, C.; Search for: Sinclair, N.; Search for: Goyal, S. K.; Search for: Aguilar, G. H.; Search for: Lefebvre, P.; Search for: Puigibert, M. Grimau; Search for: Verma, V. B.; Search for: Marsili, F.; Search for: Shaw, M. D.; Search for: Nam, S. W.; Search for: Heshami, K.1; Search for: Oblak, D.; Search for: Tittel, W.; Search for: Simon, C. |
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| Affiliation | - National Research Council of Canada. Security and Disruptive Technologies
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| Format | Text, Article |
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| Abstract | There are both fundamental and practical motivations for studying whether quantum entanglement can exist in macroscopic systems. However, multiparty entanglement is generally fragile and difficult to quantify. Dicke states are multiparty entangled states where a single excitation is delocalized over many systems. Building on previous work on quantum memories for photons, we create a Dicke state in a solid 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. We also illustrate the fact that each individual ensemble contains further entanglement. |
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| Publication date | 2017-10-13 |
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| Publisher | Nature Publishing Group |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| NPARC number | 23003052 |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | 6aa7da41-fe25-4c08-8c9e-00eb3c523551 |
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| Record created | 2018-04-17 |
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| Record modified | 2020-05-30 |
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