A theoretical approach for quantum memory based on modified superradiance lattice

We propose modified superradiance lattice (MSL) based scheme to realize quantum memory where intensity of the control field plays an important role in achieving high storage efficiency. We report that via proposed scheme one can store light with 96% storage efficiency having corresponding fidelity of 99% and group delay 1 mu s. We notice that the group delay can be enhanced to 10 mu s via manipulation of the control field, however, the storage efficiency is reduced to 87%. The benefit of considering MSL for the quantum memory is that one can obtain directional light. The main advantage of the proposed scheme is that it does not require large optical depth to obtain high storage efficiency, which makes it experimentally more viable.