Abstract
Storage capacity is a key requirement for multiplexed quantum memory in long-distance quantum communication and quantum calculation. The data exchange and processing of a quantum system would speed up, with the benefit from the increasing storage capacity. In this paper, we demonstrate a frequency selected optical storage based on the electromagnetically induced transparency scheme in warm atomic vapor. Two probe pulses with different frequencies could be stored and retrieved in different memory cell individually, in which the memory cells are divided by the velocity of atomic motion in Doppler broadening atomic vapor. The theoretical predictions show that the frequency bandwidth of the proposed multiplexed optical storage is decided by the width of Doppler broadening and the frequency bandwidth of each memory cell is decided by the width of electromagnetically induced transparency window. The proposed frequency selected storage significantly advances the pursuit of multiplexed optical memory and should have important applications in classical and quantum information processing.
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