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Atomic frequency comb memory with spin-wave storage in¹⁵³Eu^{3 +}:Y₂SiO₅

Atomic frequency comb memory with spin-wave storage in¹⁵³Eu^{3 +}:Y₂SiO₅

153Eu3 +:Y2SiO5 is a very attractive candidate for a long-lived, multimode quantum memory due to the long spin coherence time (∼15 ms), the relatively large hyperfine splitting (100 MHz) and the narrow optical homogeneous linewidth (∼100 Hz). Here we show an atomic frequency comb memory with spin-wave storage in a …