https://doi.org/10.1140/epjd/s10053-025-01056-0
Regular Article – Quantum Information
Optimal control fields for efficient quantum memory in cold atoms via EIT
1
Department of Physics, Indian Institute of Technology Delhi, 110016, New Delhi, India
2
Prenishq Pvt. Ltd., Synergy Building, TBIU Complex, Institute of Technology Delhi, 110016, New Delhi, India
a
phz198686@physics.iitd.ac.in
Received:
23
May
2025
Accepted:
19
August
2025
Published online:
6
September
2025
Quantum memory is an indispensable component for enabling reliable long-distance quantum communication through quantum repeaters. In this work, we present a theoretical study of quantum memory based on electromagnetically induced transparency in a cold ensemble of Cesium atoms. We analyze the quantum memory performance by examining its dependence on the control field Rabi frequency (
) and the atomic optical depth (D). Our results show that high storage efficiency can be achieved at larger values of both and D. Furthermore, we calculate the group velocity of slow light and investigate the decoherence rate in the hyperfine ground states used as storage levels. Notably, the decoherence rate decreases as increases and eventually saturates. These findings offer useful insights into optimizing EIT-based quantum memory and advancing practical implementations of quantum communication networks.
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Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
