Efficient integrated quantum memory for light

Reports impedance-matched integrated ${}^{151}{\mathrm{Eu}}^{3+}$:Y₂SiO₅ memories with $80.3(7)\%$ efficiency for weak coherent pulses, $69.8(1.6)\%$ for telecom-heralded single photons, and 20 temporal modes at $51.3(2)\%$ average efficiency.

Links

• Journal: Nature Photonics 20, 437–443 (2026)
• arXiv: 2511.05928

Zoo Links

• rare-earth-ion-qubit