Random access memory is an indispensable device for classical information technology. Analog to this, for quantum information technology, it is desirable to have a random access quantum memory with many memory cells and programmable access to each cell. We report an experiment that realizes a random access quantum memory of 105 qubits carried by 210 memory cells in a macroscopic atomic ensemble. We demonstrate storage of optical qubits into these memory cells and their read-out at programmable times by arbitrary orders with fidelities exceeding any classical bound. Experimental realization of a random access quantum memory with many memory cells and programmable control of its write-in and read-out makes an important step for its application in quantum communication, networking, and computation.
@article{arxiv.1904.09643,
title = {Experimental realization of 105-qubit random access quantum memory},
author = {N. Jiang and Y. -F. Pu and W. Chang and C. Li and S. Zhang and L. -M. Duan},
journal= {arXiv preprint arXiv:1904.09643},
year = {2019}
}