Solid-state spin-wave quantum memories for single photons (Conference Presentation)

Hugues de Riedmatten

doi:10.1117/12.2254557

2 June 2017 Solid-state spin-wave quantum memories for single photons (Conference Presentation)

Hugues de Riedmatten

Proceedings Volume 10118, Advances in Photonics of Quantum Computing, Memory, and Communication X; 101180Q (2017) https://doi.org/10.1117/12.2254557
Event: SPIE OPTO, 2017, San Francisco, California, United States

Abstract

Photonic quantum memories are important devices in quantum information science, and are crucial for several applications including quantum repeaters and quantum networks. Rare-earth (RE) doped crystals are promising candidates as quantum memories for light as they offer coherence properties comparable to those of atomic systems, but free of the drawbacks deriving from atomic motion. The research on RE based quantum memories has been so far mostly focused on the mapping of photonic quantum bits to optical collective excitations, but this leads to short lived and mostly pre-determined storage. However, some RE ions, as Praseodymium and Europium, exhibit the suitable energy level scheme, with three long-lived hyperfine ground states, to enable the spin-wave storage by transferring the collective optical excitations into collective spin excitations. Proof of principle spin-wave quantum memories have been reported in rare-earth doped crystals, using weak coherent states as input [1,2]. Here, I will present our recent results on the realization of multimode spin-wave quantum memories in a Praseodymium doped crystal, using non-classical input light. [1] M. Gündoğan, P. M. Ledingham, K. Kutluer, M. Mazzera and H. de Riedmatten , A solid state spin-wave quantum memory for time-bin qubits, Phys. Rev. Lett. 114, 230501 (2015) [2] P. Jobez, C. Laplane, N. Timoney, N. Gisin, A. Ferrier, P. Goldner, and M. Afzelius, Coherent Spin Control at the Quantum Level in an Ensemble-Based Optical Memory, Phys. Rev. Lett. 114, 230502 (2015)

Conference Presentation

Citation Download Citation

Hugues de Riedmatten "Solid-state spin-wave quantum memories for single photons (Conference Presentation)", Proc. SPIE 10118, Advances in Photonics of Quantum Computing, Memory, and Communication X, 101180Q (2 June 2017); https://doi.org/10.1117/12.2254557

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KEYWORDS

Quantum memory

Crystals

Solid state physics

Praseodymium

Quantum communications

Quantum information

Single photon

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