Optical storage for 0.53 s in a solid-state atomic frequency comb memory using dynamical decoupling
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Dokumenter
- Holzäpfel_2020_New_J._Phys._22_063009(1)
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Quantum memories with long storage times are key elements in long-distance quantum networks. The atomic frequency comb (AFC) memory in particular has shown great promise to fulfill this role, having demonstrated multimode capacity and spin-photon quantum correlations. However, the memory storage times have so-far been limited to about 1 ms, realized in a Eu3+ doped Y2SiO5 crystal at zero applied magnetic field. Motivated by studies showing increased spin coherence times under applied magnetic field, we developed an AFC spin-wave memory utilizing a weak 15 mT magnetic field in a specific direction that allows efficient optical and spin manipulation for AFC memory operations. With this field configuration the AFC spin-wave storage time increased to 40 ms using a simple spin-echo sequence. Furthermore, by applying dynamical decoupling techniques the spin-wave coherence time reaches 530 ms, a 300-fold increase with respect to previous AFC spin-wave storage experiments. This result paves the way towards long duration storage of quantum information in solid-state ensemble memories.
Originalsprog | Engelsk |
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Artikelnummer | 063009 |
Tidsskrift | New Journal of Physics |
Vol/bind | 22 |
Udgave nummer | 6 |
Antal sider | 14 |
ISSN | 1367-2630 |
DOI | |
Status | Udgivet - jun. 2020 |
ID: 257923181