2016/06/30 by Alexey Tiranov, Peter C. Strassmann, Jonathan Lavoie +10 · 1 citation
Computer Science · Physics and Astronomy · #Computer science #Multiplexing #Photon #Photon entanglement #Photorefractive and Nonlinear Optics #Physics #Quantum #Quantum Information and Cryptography #Quantum entanglement #Quantum mechanics #Quantum network #Quantum optics and atomic interactions #Spontaneous parametric down-conversion #Telecommunications #W state #quant-ph
paper · pdf · doi:10.1103/physrevlett.117.240506
published as Phys. Rev. Lett. 117, 240506 (2016)
arxiv created 2016/12/09 · openalex publication_date 2016/12/09 · arxiv updated 2016/12/12 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
Multiplexed quantum memories capable of storing and processing entangled photons are essential for the development of quantum networks. In this context, we demonstrate and certify the simultaneous storage and retrieval of two entangled photons inside a solid-state quantum memory and measure a temporal multimode capacity of ten modes. This is achieved by producing two polarization-entangled pairs from parametric down-conversion and mapping one photon of each pair onto a rare-earth-ion-doped (REID) crystal using the atomic frequency comb (AFC) protocol. We develop a concept of indirect entanglement witnesses, which can be used as Schmidt number witnesses, and we use it to experimentally certify the presence of more than one entangled pair retrieved from the quantum memory. Our work puts forward REID-AFC as a platform compatible with temporal multiplexing of several entangled photon pairs along with a new entanglement certification method, useful for the characterization of multiplexed quantum memories.