AI Article Synopsis
- The strong interaction between single photons is crucial for advancing quantum photonics, aiming for nonlinear optics and applications in quantum information like quantum gates and Bell-state measurements.
- Researchers have successfully stored and retrieved paired single photons using a highly nonlinear medium with Rydberg atoms, demonstrating significant advancements in single-photon interaction techniques.
- This breakthrough maintains nonclassical correlations between photons, which is a significant step toward practical photon-photon interactions and more reliable quantum memory systems.
Article Abstract
Strong interaction between two single photons is a long standing and important goal in quantum photonics. This would enable a new regime of nonlinear optics and unlock several applications in quantum information science, including photonic quantum gates and deterministic Bell-state measurements. In the context of quantum networks, it would be important to achieve interactions between single photons from independent photon pairs storable in quantum memories. So far, most experiments showing nonlinearities at the single-photon level have used weak classical input light. Here we demonstrate the storage and retrieval of a paired single photon emitted by an ensemble quantum memory in a strongly nonlinear medium based on highly excited Rydberg atoms. We show that nonclassical correlations between the two photons persist after retrieval from the Rydberg ensemble. Our result is an important step towards deterministic photon-photon interactions, and may enable deterministic Bell-state measurements with multimode quantum memories.
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|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5253638 | PMC |
| http://dx.doi.org/10.1038/ncomms14072 | DOI Listing |
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