Dynamic rephasing in a telecom warm vapor quantum memory
Published in arXiv preprint, 2026
The Off-Resonant Cascaded Absorption (ORCA) protocol in warm atomic vapors offers a scalable platform for high-bandwidth, low-noise quantum memories, but its coherence time is fundamentally limited by Doppler-induced dephasing. This work introduces and experimentally demonstrates a dynamic rephasing protocol that counteracts Doppler dephasing by transferring the stored excitation to an auxiliary shelving state, effectively reversing the accumulated Doppler phase. The protocol extends the storage time by a factor of 50 while preserving the memory’s GHz bandwidth and low noise, and it enables on-demand storage and retrieval of four independent time-bin modes within a single warm vapor memory.
Recommended citation: Ilse Maillette de Buy Wenniger, Paul Burdekin, Shicheng Zhang, Mikhael J. Rasiah, Anindya Rastogi, Otto T.P. Schmidt, Patrick M. Ledingham, Ian A. Walmsley, and S.E. Thomas. Dynamic rephasing in a telecom warm vapor quantum memory. arXiv:2604.13900 (2026).
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