Temporal Multimode Storage of Entangled Photon Pairs

 Authors: Alexey Tiranov, Peter C Strassmann, Jonathan Lavoie, Nicolas Brunner, Marcus Huber, Varun B Verma, Sae Woo Nam, Richard P Mirin, Adriana E Lita, Francesco Marsili, Mikael Afzelius, Félix Bussières, Nicolas Gisin Phys. Rev. Lett. 117, 240506 (2016) http://dx.doi.org/10.1103/PhysRevLett.117.240506 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. tiranov2016b.pdf

BibTeX Source

@article{PhysRevLett.117.240506,
title = {Temporal Multimode Storage of Entangled Photon Pairs},
author = {Tiranov, Alexey and Strassmann, Peter C. and Lavoie, Jonathan and Brunner, Nicolas and Huber, Marcus and Verma, Varun B. and Nam, Sae Woo and Mirin, Richard P. and Lita, Adriana E. and Marsili, Francesco and Afzelius, Mikael and Bussi\eres, F\'elix and Gisin, Nicolas},
journal = {Phys. Rev. Lett.},
volume = {117},
issue = {24},
pages = {240506},
numpages = {6},
year = {2016},
month = {Dec},
publisher = {American Physical Society},
doi = {10.1103/PhysRevLett.117.240506},
}`