Freiburg 2019 – wissenschaftliches Programm

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FM: Fall Meeting

FM 54: Quantum Networks: Quantum Memory and Gates

FM 54.1: Invited Talk

Mittwoch, 25. September 2019, 14:00–14:30, 1015

Quantum memories for photons — •Mikael Afzelius — Department of Applied Physics, University of Geneva

Optical quantum memories are devices that can store and later retrieve quantum states encoded onto single photons [1]. These are essential components of future quantum technologies such as quantum repeaters, which can increase quantum communication (e.g. quantum cryptography) to continental distances.

In this talk I will introduce quantum memories, their role in quantum repeaters and challenges in terms of memory requirements for repeaters. I will then briefly introduce different quantum memory schemes and some physical systems where memories are currently investigated, with a specific focus on current state-of-the-art in solid-state memories based on rare-earth doped crystals.

[1] Quantum memory for photons, M. Afzelius, N. Gisin, and H. de Riedmatten, Physics Today 68, 42 (2015)